CVE-2021-29976

Mozilla developers reported memory safety bugs present in code shared between Firefox and Thunderbird. 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 Thunderbird < 78.12, Firefox ESR < 78.12, and Firefox < 90.

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 78.12.0 ESR.

Security Fix(es):

• Mozilla: Use-after-free in accessibility features of a document (CVE-2021-29970)

• Mozilla: Memory safety bugs fixed in Firefox 90 and Firefox ESR 78.12 (CVE-2021-29976)

• chromium-browser: Out of bounds write in ANGLE (CVE-2021-30547)

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 78.12.0.

Security Fix(es):

• Mozilla: IMAP server responses sent by a MITM prior to STARTTLS could be processed (CVE-2021-29969)

• Mozilla: Use-after-free in accessibility features of a document (CVE-2021-29970)

• Mozilla: Memory safety bugs fixed in Firefox 90 and Firefox ESR 78.12 (CVE-2021-29976)

• chromium-browser: Out of bounds write in ANGLE (CVE-2021-30547)

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 developers reported memory safety bugs present in code shared between Firefox and Thunderbird. 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 Thunderbird < 78.12, Firefox ESR < 78.12, and Firefox < 90.

A malicious webpage could have triggered a use-after-free in accessibility features of a document, causing memory corruption and a potentially exploitable crash when accessibility was enabled (CVE-2021-29970).

Mozilla developers Valentin Gosu, Randell Jesup, Emil Ghitta, Tyson Smith, and Olli Pettay reported memory safety bugs present in Firefox ESR 78.11. 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-2021-29976).

An out of bounds write in ANGLE could have allowed an attacker to corrupt memory leading to a potentially exploitable crash (CVE-2021-30547).

IMAP server responses sent by a MITM prior to STARTTLS could be processed (CVE-2021-29969).

Use-after-free in accessibility features of a document (CVE-2021-29970).

Out of bounds write in ANGLE (CVE-2021-30547).

Memory safety bugs fixed in Thunderbird 78.12 (CVE-2021-29976).

This update for MozillaFirefox fixes the following issues:

Firefox Extended Support Release 78.12.0 ESR

• Fixed: Various stability, functionality, and security fixes

MFSA 2021-29 (bsc#1188275)

• CVE-2021-29970 (bmo#1709976): Use-after-free in accessibility features of a document
• CVE-2021-30547 (bmo#1715766): Out of bounds write in ANGLE
• CVE-2021-29976 (bmo#1700895, bmo#1703334, bmo#1706910, bmo#1711576, bmo#1714391): Memory safety bugs fixed in Firefox 90 and Firefox ESR 78.12

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

This update for MozillaThunderbird fixes the following issues:

Mozilla Thunderbird 78.12

• fixed: Sending an email containing HTML links with spaces in the URL sometimes resulted in broken links
• fixed: Folder Pane display theme fixes for macOS
• fixed: Chat account settings did not always save as expected
• fixed: RSS feed subscriptions sometimes lost
• fixed: Calendar: A parsing error for alarm triggers of type 'DURATION' caused sync problems for some users
• fixed: Various security fixes

MFSA 2021-30 (bsc#1188275)

• CVE-2021-29969: IMAP server responses sent by a MITM prior to STARTTLS could be processed
• CVE-2021-29970: Use-after-free in accessibility features of a document
• CVE-2021-30547: Out of bounds write in ANGLE
• CVE-2021-29976: Memory safety bugs fixed in Thunderbird 78.12

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

This update for MozillaFirefox fixes the following issues:

Firefox Extended Support Release 78.12.0 ESR

• Fixed: Various stability, functionality, and security fixes

MFSA 2021-29 (bsc#1188275)

• CVE-2021-29970 (bmo#1709976): Use-after-free in accessibility features of a document
• CVE-2021-30547 (bmo#1715766): Out of bounds write in ANGLE
• CVE-2021-29976 (bmo#1700895, bmo#1703334, bmo#1706910, bmo#1711576, bmo#1714391): Memory safety bugs fixed in Firefox 90 and Firefox ESR 78.12

This update for MozillaThunderbird fixes the following issues:

Mozilla Thunderbird 78.12

• fixed: Sending an email containing HTML links with spaces in the URL sometimes resulted in broken links
• fixed: Folder Pane display theme fixes for macOS
• fixed: Chat account settings did not always save as expected
• fixed: RSS feed subscriptions sometimes lost
• fixed: Calendar: A parsing error for alarm triggers of type 'DURATION' caused sync problems for some users
• fixed: Various security fixes

MFSA 2021-30 (bsc#1188275)

• CVE-2021-29969: IMAP server responses sent by a MITM prior to STARTTLS could be processed
• CVE-2021-29970: Use-after-free in accessibility features of a document
• CVE-2021-30547: Out of bounds write in ANGLE
• CVE-2021-29976: Memory safety bugs fixed in Thunderbird 78.12

These are all security issues fixed in the MozillaFirefox-92.0-1.2 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the MozillaThunderbird-91.1.1-1.1 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:

Firefox Extended Support Release 78.12.0 ESR

• Fixed: Various stability, functionality, and security fixes

MFSA 2021-29 (bsc#1188275)

• CVE-2021-29970: Use-after-free in accessibility features of a document
• CVE-2021-30547: Out of bounds write in ANGLE
• CVE-2021-29976: Memory safety bugs fixed in Firefox 90 and Firefox ESR 78.12

This update for MozillaFirefox fixes the following issues:

Firefox Extended Support Release 78.12.0 ESR

• Fixed: Various stability, functionality, and security fixes

MFSA 2021-29 (bsc#1188275)

• CVE-2021-29970: Use-after-free in accessibility features of a document
• CVE-2021-30547: Out of bounds write in ANGLE
• CVE-2021-29976: Memory safety bugs fixed in Firefox 90 and Firefox ESR 78.12

This update for MozillaFirefox fixes the following issues:

Firefox Extended Support Release 78.12.0 ESR

• Fixed: Various stability, functionality, and security fixes

MFSA 2021-29 (bsc#1188275)

• CVE-2021-29970 (bmo#1709976): Use-after-free in accessibility features of a document
• CVE-2021-30547 (bmo#1715766): Out of bounds write in ANGLE
• CVE-2021-29976 (bmo#1700895, bmo#1703334, bmo#1706910, bmo#1711576, bmo#1714391): Memory safety bugs fixed in Firefox 90 and Firefox ESR 78.12

This update for MozillaThunderbird fixes the following issues:

Mozilla Thunderbird 78.12

• fixed: Sending an email containing HTML links with spaces in the URL sometimes resulted in broken links
• fixed: Folder Pane display theme fixes for macOS
• fixed: Chat account settings did not always save as expected
• fixed: RSS feed subscriptions sometimes lost
• fixed: Calendar: A parsing error for alarm triggers of type 'DURATION' caused sync problems for some users
• fixed: Various security fixes

MFSA 2021-30 (bsc#1188275)

• CVE-2021-29969: IMAP server responses sent by a MITM prior to STARTTLS could be processed
• CVE-2021-29970: Use-after-free in accessibility features of a document
• CVE-2021-30547: Out of bounds write in ANGLE
• CVE-2021-29976: Memory safety bugs fixed in Thunderbird 78.12

This update for MozillaFirefox fixes the following issues:

Firefox Extended Support Release 78.12.0 ESR

• Fixed: Various stability, functionality, and security fixes

MFSA 2021-29 (bsc#1188275)

• CVE-2021-29970: Use-after-free in accessibility features of a document
• CVE-2021-30547: Out of bounds write in ANGLE
• CVE-2021-29976: Memory safety bugs fixed in Firefox 90 and Firefox ESR 78.12

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, overlay text over another domain, or execute arbitrary code.

It was discovered that Thunderbird didn't ignore IMAP server responses prior to completion of the STARTTLS handshake. A person-in-the-middle could potentially exploit this to trick Thunderbird into showing incorrect information. (CVE-2021-29969)

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, or execute arbitrary code. (CVE-2021-29970, CVE-2021-29976, CVE-2021-29980, CVE-2021-29984, CVE-2021-29985, CVE-2021-29986, CVE-2021-29988, CVE-2021-29989, CVE-2021-30547)