CVE-2021-43541

When invoking protocol handlers for external protocols, a supplied parameter URL containing spaces was not properly escaped. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

Mozilla Firefox is a standalone web browser, designed for standards compliance and performance. Its functionality can be enhanced via a plethora of extensions.

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance and portability.

Security Fix(es):

Mozilla developers reported memory safety bugs present in Firefox for Android 79. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 80, Firefox ESR < 78.2, Thunderbird < 78.2, and Firefox for Android < 80.(CVE-2020-15670)

Mozilla developers reported memory safety bugs present in Firefox 80 and Firefox ESR 78.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.(CVE-2020-15673)

Mozilla developers reported memory safety bugs present in Firefox 80. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 81.(CVE-2020-15674)

When processing surfaces, the lifetime may outlive a persistent buffer leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 81.(CVE-2020-15675)

If a valid external protocol handler was referenced in an image tag, the resulting broken image size could be distinguished from a broken image size of a non-existent protocol handler. This allowed an attacker to successfully probe whether an external protocol handler was registered. This vulnerability affects Firefox < 82.(CVE-2020-15680)

When multiple WASM threads had a reference to a module, and were looking up exported functions, one WASM thread could have overwritten another's entry in a shared stub table, resulting in a potentially exploitable crash. This vulnerability affects Firefox < 82.(CVE-2020-15681)

When a link to an external protocol was clicked, a prompt was presented that allowed the user to choose what application to open it in. An attacker could induce that prompt to be associated with an origin they didn't control, resulting in a spoofing attack. This was fixed by changing external protocol prompts to be tab-modal while also ensuring they could not be incorrectly associated with a different origin. This vulnerability affects Firefox < 82.(CVE-2020-15682)

Mozilla developers and community members reported memory safety bugs present in Firefox 81 and Firefox ESR 78.3. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.4, Firefox < 82, and Thunderbird < 78.4.(CVE-2020-15683)

Mozilla developers reported memory safety bugs present in Firefox 81. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 82.(CVE-2020-15684)

Side-channel information leakage in graphics in Google Chrome prior to 87.0.4280.66 allowed a remote attacker to leak cross-origin data via a crafted HTML page.(CVE-2020-16012)

Use after free in WebRTC in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to potentially exploit heap corruption via a crafted SCTP packet.(CVE-2020-16044)

In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition. This vulnerability affects Firefox < 82.0.3, Firefox ESR < 78.4.1, and Thunderbird < 78.4.2.(CVE-2020-26950)

(CVE-2020-26951)

(CVE-2020-26953) …

Mozilla Firefox is a standalone web browser, designed for standards compliance and performance. Its functionality can be enhanced via a plethora of extensions.

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance and portability.

Security Fix(es):

Mozilla developers reported memory safety bugs present in Firefox for Android 79. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 80, Firefox ESR < 78.2, Thunderbird < 78.2, and Firefox for Android < 80.(CVE-2020-15670)

Mozilla developers reported memory safety bugs present in Firefox 80 and Firefox ESR 78.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.(CVE-2020-15673)

Mozilla developers reported memory safety bugs present in Firefox 80. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 81.(CVE-2020-15674)

When processing surfaces, the lifetime may outlive a persistent buffer leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 81.(CVE-2020-15675)

If a valid external protocol handler was referenced in an image tag, the resulting broken image size could be distinguished from a broken image size of a non-existent protocol handler. This allowed an attacker to successfully probe whether an external protocol handler was registered. This vulnerability affects Firefox < 82.(CVE-2020-15680)

When multiple WASM threads had a reference to a module, and were looking up exported functions, one WASM thread could have overwritten another's entry in a shared stub table, resulting in a potentially exploitable crash. This vulnerability affects Firefox < 82.(CVE-2020-15681)

When a link to an external protocol was clicked, a prompt was presented that allowed the user to choose what application to open it in. An attacker could induce that prompt to be associated with an origin they didn't control, resulting in a spoofing attack. This was fixed by changing external protocol prompts to be tab-modal while also ensuring they could not be incorrectly associated with a different origin. This vulnerability affects Firefox < 82.(CVE-2020-15682)

Mozilla developers and community members reported memory safety bugs present in Firefox 81 and Firefox ESR 78.3. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.4, Firefox < 82, and Thunderbird < 78.4.(CVE-2020-15683)

Mozilla developers reported memory safety bugs present in Firefox 81. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 82.(CVE-2020-15684)

Side-channel information leakage in graphics in Google Chrome prior to 87.0.4280.66 allowed a remote attacker to leak cross-origin data via a crafted HTML page.(CVE-2020-16012)

Use after free in WebRTC in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to potentially exploit heap corruption via a crafted SCTP packet.(CVE-2020-16044)

In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition. This vulnerability affects Firefox < 82.0.3, Firefox ESR < 78.4.1, and Thunderbird < 78.4.2.(CVE-2020-26950)

(CVE-2020-26951)

(CVE-2020-26953) …

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

This update upgrades Firefox to version 91.4.0 ESR.

Security Fix(es):

• Mozilla: Memory safety bugs fixed in Firefox 95 and Firefox ESR 91.4

• Mozilla: URL leakage when navigating while executing asynchronous function (CVE-2021-43536)

• Mozilla: Heap buffer overflow when using structured clone (CVE-2021-43537)

• Mozilla: Missing fullscreen and pointer lock notification when requesting both (CVE-2021-43538)

• Mozilla: GC rooting failure when calling wasm instance methods (CVE-2021-43539)

• Mozilla: External protocol handler parameters were unescaped (CVE-2021-43541)

• Mozilla: XMLHttpRequest error codes could have leaked the existence of an external protocol handler (CVE-2021-43542)

• Mozilla: Bypass of CSP sandbox directive when embedding (CVE-2021-43543)

• Mozilla: Denial of Service when using the Location API in a loop (CVE-2021-43545)

• Mozilla: Cursor spoofing could overlay user interface when native cursor is zoomed (CVE-2021-43546)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Mozilla Thunderbird is a standalone mail and newsgroup client.

This update upgrades Thunderbird to version 91.4.0.

Security Fix(es):

• Mozilla: Memory safety bugs fixed in Firefox 95 and Firefox ESR 91.4 (BZ#2030116)

• Mozilla: URL leakage when navigating while executing asynchronous function (CVE-2021-43536)

• Mozilla: Heap buffer overflow when using structured clone (CVE-2021-43537)

• Mozilla: Missing fullscreen and pointer lock notification when requesting both (CVE-2021-43538)

• Mozilla: GC rooting failure when calling wasm instance methods (CVE-2021-43539)

• Mozilla: External protocol handler parameters were unescaped (CVE-2021-43541)

• Mozilla: XMLHttpRequest error codes could have leaked the existence of an external protocol handler (CVE-2021-43542)

• Mozilla: Bypass of CSP sandbox directive when embedding (CVE-2021-43543)

• Mozilla: JavaScript unexpectedly enabled for the composition area (CVE-2021-43528)

• Mozilla: Denial of Service when using the Location API in a loop (CVE-2021-43545)

• Mozilla: Cursor spoofing could overlay user interface when native cursor is zoomed (CVE-2021-43546)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

When invoking protocol handlers for external protocols, a supplied parameter URL containing spaces was not properly escaped. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

This update upgrades Firefox to version 91.4.0 ESR.

Security Fix(es):

• Mozilla: Memory safety bugs fixed in Firefox 95 and Firefox ESR 91.4

• Mozilla: URL leakage when navigating while executing asynchronous function (CVE-2021-43536)

• Mozilla: Heap buffer overflow when using structured clone (CVE-2021-43537)

• Mozilla: Missing fullscreen and pointer lock notification when requesting both (CVE-2021-43538)

• Mozilla: GC rooting failure when calling wasm instance methods (CVE-2021-43539)

• Mozilla: External protocol handler parameters were unescaped (CVE-2021-43541)

• Mozilla: XMLHttpRequest error codes could have leaked the existence of an external protocol handler (CVE-2021-43542)

• Mozilla: Bypass of CSP sandbox directive when embedding (CVE-2021-43543)

• Mozilla: Denial of Service when using the Location API in a loop (CVE-2021-43545)

• Mozilla: Cursor spoofing could overlay user interface when native cursor is zoomed (CVE-2021-43546)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Mozilla Thunderbird is a standalone mail and newsgroup client.

This update upgrades Thunderbird to version 91.4.0.

Security Fix(es):

• Mozilla: Memory safety bugs fixed in Firefox 95 and Firefox ESR 91.4 (BZ#2030116)

• Mozilla: URL leakage when navigating while executing asynchronous function (CVE-2021-43536)

• Mozilla: Heap buffer overflow when using structured clone (CVE-2021-43537)

• Mozilla: Missing fullscreen and pointer lock notification when requesting both (CVE-2021-43538)

• Mozilla: GC rooting failure when calling wasm instance methods (CVE-2021-43539)

• Mozilla: External protocol handler parameters were unescaped (CVE-2021-43541)

• Mozilla: XMLHttpRequest error codes could have leaked the existence of an external protocol handler (CVE-2021-43542)

• Mozilla: Bypass of CSP sandbox directive when embedding (CVE-2021-43543)

• Mozilla: JavaScript unexpectedly enabled for the composition area (CVE-2021-43528)

• Mozilla: Denial of Service when using the Location API in a loop (CVE-2021-43545)

• Mozilla: Cursor spoofing could overlay user interface when native cursor is zoomed (CVE-2021-43546)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Under certain circumstances, asynchronous functions could have caused a navigation to fail but expose the target URL (CVE-2021-43536).

An incorrect type conversion of sizes from 64bit to 32bit integers allowed an attacker to corrupt memory leading to a potentially exploitable crash due to a heap buffer overflow when using structured clone (CVE-2021-43537).

By misusing a race in our notification code, an attacker could have forcefully hidden the notification for pages that had received both full screen and pointer lock access, which could have been used for spoofing attacks (CVE-2021-43538).

Failure to correctly record the location of live pointers across wasm instance calls resulted in a GC occurring within the call not tracing those live pointers. This could have led to a use-after-free causing a potentially exploitable crash (CVE-2021-43539).

When invoking protocol handlers for external protocols, a supplied parameter URL containing spaces was not properly escaped (CVE-2021-43541).

Using XMLHttpRequest, an attacker could have identified installed applications by probing error messages for loading external protocols (CVE-2021-43542).

Documents loaded with the CSP sandbox directive could have escaped the sandbox's script restriction by embedding additional content (CVE-2021-43543).

Using the Location API in a loop could have caused severe application hangs and crashes (CVE-2021-43545).

It was possible to recreate previous cursor spoofing attacks against users with a zoomed native cursor (CVE-2021-43546).

Mozilla developers and community members Julian Hector, Randell Jesup, Gabriele Svelto, Tyson Smith, Christian Holler, and Masayuki Nakano reported memory safety bugs present in Firefox ESR 91.3. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code (CVE-2021-4129).

Thunderbird unexpectedly enabled JavaScript in the composition area. The JavaScript execution context was limited to this area and did not receive chrome-level privileges, but could be used as a stepping stone to further an attack with other vulnerabilities (CVE-2021-43528).

Under certain circumstances, asynchronous functions could have caused a navigation to fail but expose the target URL (CVE-2021-43536).

An incorrect type conversion of sizes from 64bit to 32bit integers allowed an attacker to corrupt memory leading to a potentially exploitable crash due to a heap buffer overflow when using structured clone (CVE-2021-43537).

By misusing a race in our notification code, an attacker could have forcefully hidden the notification for pages that had received both full screen and pointer lock access, which could have been used for spoofing attacks (CVE-2021-43538).

Failure to correctly record the location of live pointers across wasm instance calls resulted in a GC occurring within the call not tracing those live
pointers. This could have led to a use-after-free causing a potentially
exploitable crash (CVE-2021-43539).

When invoking protocol handlers for external protocols, a supplied parameter URL containing spaces was not properly escaped (CVE-2021-43541).

Using XMLHttpRequest, an attacker could have identified installed applications by probing error messages for loading external protocols (CVE-2021-43542).

Documents loaded with the CSP sandbox directive could have escaped the sandbox's script restriction by embedding additional content (CVE-2021-43543).

Using the Location API in a loop could have caused severe application hangs and crashes (CVE-2021-43545).

It was possible to recreate previous cursor spoofing attacks against users with a zoomed native cursor (CVE-2021-43546).

Mozilla developers and community members Julian Hector, Randell Jesup, Gabriele Svelto, Tyson Smith, Christian Holler, and Masayuki Nakano reported memory safety bugs present in Thunderbird 91.3. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code (CVE-2021-4129).

This update for MozillaFirefox fixes the following issues:

Update to Extended Support Release 91.4.0 (bsc#1193485):

• CVE-2021-43536: URL leakage when navigating while executing asynchronous function
• CVE-2021-43537: Heap buffer overflow when using structured clone
• CVE-2021-43538: Missing fullscreen and pointer lock notification when requesting both
• CVE-2021-43539: GC rooting failure when calling wasm instance methods
• CVE-2021-43541: External protocol handler parameters were unescaped
• CVE-2021-43542: XMLHttpRequest error codes could have leaked the existence of an external protocol handler
• CVE-2021-43543: Bypass of CSP sandbox directive when embedding
• CVE-2021-43545: Denial of Service when using the Location API in a loop
• CVE-2021-43546: Cursor spoofing could overlay user interface when native cursor is zoomed
• Memory safety bugs fixed in Firefox 95 and Firefox ESR 91.4
• Removed x-scheme-handler/ftp from MozillaFirefox.desktop (bsc#1193321)

This update was imported from the SUSE:SLE-15-SP2:Update update project.

This update for MozillaThunderbird fixes the following issues:

• Update to version 91.4 MFSA 2021-54 (bsc#1193485)

• CVE-2021-43536: URL leakage when navigating while executing asynchronous function

• CVE-2021-43537: Heap buffer overflow when using structured clone

• CVE-2021-43538: Missing fullscreen and pointer lock notification when requesting both

• CVE-2021-43539: GC rooting failure when calling wasm instance methods

• CVE-2021-43541: External protocol handler parameters were unescaped

• CVE-2021-43542: XMLHttpRequest error codes could have leaked the existence of an external protocol handler

• CVE-2021-43543: Bypass of CSP sandbox directive when embedding

• CVE-2021-43545: Denial of Service when using the Location API in a loop

• CVE-2021-43546: Cursor spoofing could overlay user interface when native cursor is zoomed

• CVE-2021-43528: JavaScript unexpectedly enabled for the composition area

• Update to version 91.3.2

• CVE-2021-40529: Fixed ElGamal implementation could allow plaintext recovery (bsc#1190244)

• Update to version 91.3 MFSA 2021-50 (bsc#1192250)

• CVE-2021-38503: Fixed iframe sandbox rules did not apply to XSLT stylesheets

• CVE-2021-38504: Fixed use-after-free in file picker dialog

• CVE-2021-38505: Fixed Windows 10 Cloud Clipboard may have recorded sensitive user data

• CVE-2021-38506: Fixed Thunderbird could be coaxed into going into fullscreen mode without notification or warning

• CVE-2021-38507: Fixed opportunistic Encryption in HTTP2 could be used to bypass the Same-Origin-Policy on services hosted on other ports

• CVE-2021-38508: Fixed permission Prompt could be overlaid, resulting in user confusion and potential spoofing

• CVE-2021-38509: Fixed Javascript alert box could have been spoofed onto an arbitrary domain

• CVE-2021-38510: Fixed Download Protections were bypassed by .inetloc files on Mac OS

• Fixed plain text reformatting regression (bsc#1182863)

• Update to version 91.2 MFSA 2021-47 (bsc#1191332)

• CVE-2021-29981: Live range splitting could have led to conflicting assignments in the JIT

• CVE-2021-29982: Single bit data leak due to incorrect JIT optimization and type confusion

• CVE-2021-29987: Users could have been tricked into accepting unwanted permissions on Linux

• CVE-2021-32810: Data race in crossbeam-deque

• CVE-2021-38493: Memory safety bugs fixed in Thunderbird 78.14 and Thunderbird 91.1

• CVE-2021-38496: Use-after-free in MessageTask

• CVE-2021-38497: Validation message could have been overlaid on another origin

• CVE-2021-38498: Use-after-free of nsLanguageAtomService object

• CVE-2021-38500: Memory safety bugs fixed in Thunderbird 91.2

• CVE-2021-38501: Memory safety bugs fixed in Thunderbird 91.2

• CVE-2021-38502: Downgrade attack on SMTP STARTTLS connections

• Update to version 91.1.0 MFSA 2021-41 (bsc#1190269)

• CVE-2021-38492: Navigating to mk: URL scheme could load Internet Explorer

• CVE-2021-38495: Memory safety bugs fixed in Thunderbird 91.1

• Update to version 91.0.1 MFSA 2021-37 (bsc#1189547)

• CVE-2021-29991: Header Splitting possible with HTTP/3 Responses

This update was imported from the SUSE:SLE-15-SP2:Update update project.

This update for MozillaFirefox fixes the following issues:

Update to Extended Support Release 91.4.0 (bsc#1193485):

• CVE-2021-43536: URL leakage when navigating while executing asynchronous function
• CVE-2021-43537: Heap buffer overflow when using structured clone
• CVE-2021-43538: Missing fullscreen and pointer lock notification when requesting both
• CVE-2021-43539: GC rooting failure when calling wasm instance methods
• CVE-2021-43541: External protocol handler parameters were unescaped
• CVE-2021-43542: XMLHttpRequest error codes could have leaked the existence of an external protocol handler
• CVE-2021-43543: Bypass of CSP sandbox directive when embedding
• CVE-2021-43545: Denial of Service when using the Location API in a loop
• CVE-2021-43546: Cursor spoofing could overlay user interface when native cursor is zoomed
• Memory safety bugs fixed in Firefox 95 and Firefox ESR 91.4
• Removed x-scheme-handler/ftp from MozillaFirefox.desktop (bsc#1193321)

This update for MozillaThunderbird fixes the following issues:

• Update to version 91.4 MFSA 2021-54 (bsc#1193485)

• CVE-2021-43536: URL leakage when navigating while executing asynchronous function

• CVE-2021-43537: Heap buffer overflow when using structured clone

• CVE-2021-43538: Missing fullscreen and pointer lock notification when requesting both

• CVE-2021-43539: GC rooting failure when calling wasm instance methods

• CVE-2021-43541: External protocol handler parameters were unescaped

• CVE-2021-43542: XMLHttpRequest error codes could have leaked the existence of an external protocol handler

• CVE-2021-43543: Bypass of CSP sandbox directive when embedding

• CVE-2021-43545: Denial of Service when using the Location API in a loop

• CVE-2021-43546: Cursor spoofing could overlay user interface when native cursor is zoomed

• CVE-2021-43528: JavaScript unexpectedly enabled for the composition area

• Update to version 91.3.2

• CVE-2021-40529: Fixed ElGamal implementation could allow plaintext recovery (bsc#1190244)

• Update to version 91.3 MFSA 2021-50 (bsc#1192250)

• CVE-2021-38503: Fixed iframe sandbox rules did not apply to XSLT stylesheets

• CVE-2021-38504: Fixed use-after-free in file picker dialog

• CVE-2021-38505: Fixed Windows 10 Cloud Clipboard may have recorded sensitive user data

• CVE-2021-38506: Fixed Thunderbird could be coaxed into going into fullscreen mode without notification or warning

• CVE-2021-38507: Fixed opportunistic Encryption in HTTP2 could be used to bypass the Same-Origin-Policy on services hosted on other ports

• CVE-2021-38508: Fixed permission Prompt could be overlaid, resulting in user confusion and potential spoofing

• CVE-2021-38509: Fixed Javascript alert box could have been spoofed onto an arbitrary domain

• CVE-2021-38510: Fixed Download Protections were bypassed by .inetloc files on Mac OS

• Fixed plain text reformatting regression (bsc#1182863)

• Update to version 91.2 MFSA 2021-47 (bsc#1191332)

• CVE-2021-29981: Live range splitting could have led to conflicting assignments in the JIT

• CVE-2021-29982: Single bit data leak due to incorrect JIT optimization and type confusion

• CVE-2021-29987: Users could have been tricked into accepting unwanted permissions on Linux

• CVE-2021-32810: Data race in crossbeam-deque

• CVE-2021-38493: Memory safety bugs fixed in Thunderbird 78.14 and Thunderbird 91.1

• CVE-2021-38496: Use-after-free in MessageTask

• CVE-2021-38497: Validation message could have been overlaid on another origin

• CVE-2021-38498: Use-after-free of nsLanguageAtomService object

• CVE-2021-38500: Memory safety bugs fixed in Thunderbird 91.2

• CVE-2021-38501: Memory safety bugs fixed in Thunderbird 91.2

• CVE-2021-38502: Downgrade attack on SMTP STARTTLS connections

• Update to version 91.1.0 MFSA 2021-41 (bsc#1190269)

• CVE-2021-38492: Navigating to mk: URL scheme could load Internet Explorer

• CVE-2021-38495: Memory safety bugs fixed in Thunderbird 91.1

• Update to version 91.0.1 MFSA 2021-37 (bsc#1189547)

• CVE-2021-29991: Header Splitting possible with HTTP/3 Responses

These are all security issues fixed in the MozillaFirefox-95.0-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the MozillaThunderbird-91.4.0-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the firefox-esr-128.5.1-1.1 package on the GA media of openSUSE Tumbleweed.

This update for MozillaFirefox fixes the following issues:

Update to Extended Support Release 91.4.0 (bsc#1193485):

• CVE-2021-43536: URL leakage when navigating while executing asynchronous function
• CVE-2021-43537: Heap buffer overflow when using structured clone
• CVE-2021-43538: Missing fullscreen and pointer lock notification when requesting both
• CVE-2021-43539: GC rooting failure when calling wasm instance methods
• CVE-2021-43541: External protocol handler parameters were unescaped
• CVE-2021-43542: XMLHttpRequest error codes could have leaked the existence of an external protocol handler
• CVE-2021-43543: Bypass of CSP sandbox directive when embedding
• CVE-2021-43545: Denial of Service when using the Location API in a loop
• CVE-2021-43546: Cursor spoofing could overlay user interface when native cursor is zoomed
• Memory safety bugs fixed in Firefox 95 and Firefox ESR 91.4
• Removed x-scheme-handler/ftp from MozillaFirefox.desktop (bsc#1193321)

This update for MozillaFirefox fixes the following issues:

Update to Extended Support Release 91.4.0 (bsc#1193485):

• CVE-2021-43536: URL leakage when navigating while executing asynchronous function
• CVE-2021-43537: Heap buffer overflow when using structured clone
• CVE-2021-43538: Missing fullscreen and pointer lock notification when requesting both
• CVE-2021-43539: GC rooting failure when calling wasm instance methods
• CVE-2021-43541: External protocol handler parameters were unescaped
• CVE-2021-43542: XMLHttpRequest error codes could have leaked the existence of an external protocol handler
• CVE-2021-43543: Bypass of CSP sandbox directive when embedding
• CVE-2021-43545: Denial of Service when using the Location API in a loop
• CVE-2021-43546: Cursor spoofing could overlay user interface when native cursor is zoomed
• Memory safety bugs fixed in Firefox 95 and Firefox ESR 91.4
• Removed x-scheme-handler/ftp from MozillaFirefox.desktop (bsc#1193321)

This update for MozillaFirefox fixes the following issues:

Update to Extended Support Release 91.4.0 (bsc#1193485):

• CVE-2021-43536: URL leakage when navigating while executing asynchronous function
• CVE-2021-43537: Heap buffer overflow when using structured clone
• CVE-2021-43538: Missing fullscreen and pointer lock notification when requesting both
• CVE-2021-43539: GC rooting failure when calling wasm instance methods
• CVE-2021-43541: External protocol handler parameters were unescaped
• CVE-2021-43542: XMLHttpRequest error codes could have leaked the existence of an external protocol handler
• CVE-2021-43543: Bypass of CSP sandbox directive when embedding
• CVE-2021-43545: Denial of Service when using the Location API in a loop
• CVE-2021-43546: Cursor spoofing could overlay user interface when native cursor is zoomed
• Memory safety bugs fixed in Firefox 95 and Firefox ESR 91.4
• Removed x-scheme-handler/ftp from MozillaFirefox.desktop (bsc#1193321)

This update for MozillaFirefox fixes the following issues:

Update to Extended Support Release 91.4.0 (bsc#1193485):

• CVE-2021-43536: URL leakage when navigating while executing asynchronous function
• CVE-2021-43537: Heap buffer overflow when using structured clone
• CVE-2021-43538: Missing fullscreen and pointer lock notification when requesting both
• CVE-2021-43539: GC rooting failure when calling wasm instance methods
• CVE-2021-43541: External protocol handler parameters were unescaped
• CVE-2021-43542: XMLHttpRequest error codes could have leaked the existence of an external protocol handler
• CVE-2021-43543: Bypass of CSP sandbox directive when embedding
• CVE-2021-43545: Denial of Service when using the Location API in a loop
• CVE-2021-43546: Cursor spoofing could overlay user interface when native cursor is zoomed
• Memory safety bugs fixed in Firefox 95 and Firefox ESR 91.4
• Removed x-scheme-handler/ftp from MozillaFirefox.desktop (bsc#1193321)

This update for MozillaThunderbird fixes the following issues:

• Update to version 91.4 MFSA 2021-54 (bsc#1193485)

• CVE-2021-43536: URL leakage when navigating while executing asynchronous function

• CVE-2021-43537: Heap buffer overflow when using structured clone

• CVE-2021-43538: Missing fullscreen and pointer lock notification when requesting both

• CVE-2021-43539: GC rooting failure when calling wasm instance methods

• CVE-2021-43541: External protocol handler parameters were unescaped

• CVE-2021-43542: XMLHttpRequest error codes could have leaked the existence of an external protocol handler

• CVE-2021-43543: Bypass of CSP sandbox directive when embedding

• CVE-2021-43545: Denial of Service when using the Location API in a loop

• CVE-2021-43546: Cursor spoofing could overlay user interface when native cursor is zoomed

• CVE-2021-43528: JavaScript unexpectedly enabled for the composition area

• Update to version 91.3.2

• CVE-2021-40529: Fixed ElGamal implementation could allow plaintext recovery (bsc#1190244)

• Update to version 91.3 MFSA 2021-50 (bsc#1192250)

• CVE-2021-38503: Fixed iframe sandbox rules did not apply to XSLT stylesheets

• CVE-2021-38504: Fixed use-after-free in file picker dialog

• CVE-2021-38505: Fixed Windows 10 Cloud Clipboard may have recorded sensitive user data

• CVE-2021-38506: Fixed Thunderbird could be coaxed into going into fullscreen mode without notification or warning

• CVE-2021-38507: Fixed opportunistic Encryption in HTTP2 could be used to bypass the Same-Origin-Policy on services hosted on other ports

• CVE-2021-38508: Fixed permission Prompt could be overlaid, resulting in user confusion and potential spoofing

• CVE-2021-38509: Fixed Javascript alert box could have been spoofed onto an arbitrary domain

• CVE-2021-38510: Fixed Download Protections were bypassed by .inetloc files on Mac OS

• Fixed plain text reformatting regression (bsc#1182863)

• Update to version 91.2 MFSA 2021-47 (bsc#1191332)

• CVE-2021-29981: Live range splitting could have led to conflicting assignments in the JIT

• CVE-2021-29982: Single bit data leak due to incorrect JIT optimization and type confusion

• CVE-2021-29987: Users could have been tricked into accepting unwanted permissions on Linux

• CVE-2021-32810: Data race in crossbeam-deque

• CVE-2021-38493: Memory safety bugs fixed in Thunderbird 78.14 and Thunderbird 91.1

• CVE-2021-38496: Use-after-free in MessageTask

• CVE-2021-38497: Validation message could have been overlaid on another origin

• CVE-2021-38498: Use-after-free of nsLanguageAtomService object

• CVE-2021-38500: Memory safety bugs fixed in Thunderbird 91.2

• CVE-2021-38501: Memory safety bugs fixed in Thunderbird 91.2

• CVE-2021-38502: Downgrade attack on SMTP STARTTLS connections

• Update to version 91.1.0 MFSA 2021-41 (bsc#1190269)

• CVE-2021-38492: Navigating to mk: URL scheme could load Internet Explorer

• CVE-2021-38495: Memory safety bugs fixed in Thunderbird 91.1

• Update to version 91.0.1 MFSA 2021-37 (bsc#1189547)

• CVE-2021-29991: Header Splitting possible with HTTP/3 Responses

Multiple security issues were discovered in Firefox. If a user were tricked into opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, conduct spoofing attacks, bypass CSP restrictions, or execute arbitrary code. (CVE-2021-43536, CVE-2021-43537, CVE-2021-43538, CVE-2021-43539, CVE-2021-43541, CVE-2021-43542, CVE-2021-43543, CVE-2021-43545, CVE-2021-43546)

A security issue was discovered with the handling of WebExtension permissions. If a user were tricked into installing a specially crafted extension, an attacker could potentially exploit this to create and install a service worker that wouldn't be uninstalled with the extension. (CVE-2021-43540)

Multiple security issues were discovered in Thunderbird. If a user were tricked into opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, trick a user into accepting unwanted permissions, conduct header splitting attacks, conduct spoofing attacks, bypass security restrictions, confuse the user, or execute arbitrary code. (CVE-2021-4129, CVE-2021-4140, CVE-2021-29981, CVE-2021-29982, CVE-2021-29987, CVE-2021-29991, CVE-2021-38495, CVE-2021-38496, CVE-2021-38497, CVE-2021-38498, CVE-2021-38500, CVE-2021-38501, CVE-2021-38503, CVE-2021-38504, CVE-2021-38506, CVE-2021-38507, CVE-2021-38508, CVE-2021-38509, CVE-2021-43534, CVE-2021-43535, CVE-2021-43536, CVE-2021-43537, CVE-2021-43538, CVE-2021-43539, CVE-2021-43541, CVE-2021-43542, CVE-2021-43543, CVE-2021-43545, CVE-2021-43656, CVE-2022-22737, CVE-2022-22738, CVE-2022-22739, CVE-2022-22740, CVE-2022-22741, CVE-2022-22742, CVE-2022-22743, CVE-2022-22745, CVE-2022-22747, CVE-2022-22748, CVE-2022-22751)

It was discovered that Thunderbird ignored the configuration to require STARTTLS for an SMTP connection. A person-in-the-middle could potentially exploit this to perform a downgrade attack in order to intercept messages or take control of a session. (CVE-2021-38502)

It was discovered that JavaScript was unexpectedly enabled in the composition area. An attacker could potentially exploit this in combination with another vulnerability, with unspecified impacts. (CVE-2021-43528)

A buffer overflow was discovered in the Matrix chat library bundled with Thunderbird. An attacker could potentially exploit this to cause a denial of service, or execute arbitrary code. (CVE-2021-44538)

It was discovered that Thunderbird's OpenPGP integration only considered the inner signed message when checking signature validity in a message that contains an additional outer MIME layer. An attacker could potentially exploit this to trick the user into thinking that a message has a valid signature. (CVE-2021-4126)