CVE-2023-6206

The black fade animation when exiting fullscreen is roughly the length of the anti-clickjacking delay on permission prompts. It was possible to use this fact to surprise users by luring them to click where the permission grant button would be about to appear. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.

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

Security Fix(es):

When loading a script with Subresource Integrity, attackers with an injection capability could trigger the reuse of previously cached entries with incorrect, different integrity metadata. This vulnerability affects Firefox < 103.(CVE-2022-36315)

When using the Performance API, an attacker was able to notice subtle differences between PerformanceEntries and thus learn whether the target URL had been subject to a redirect. This vulnerability affects Firefox < 103.(CVE-2022-36316)

An attacker could have written a value to the first element in a zero-length JavaScript array. Although the array was zero-length, the value was not written to an invalid memory address. This vulnerability affects Firefox < 104.(CVE-2022-38475)

Service Workers did not detect Private Browsing Mode correctly in all cases, which could have led to Service Workers being written to disk for websites visited in Private Browsing Mode. This would not have persisted them in a state where they would run again, but it would have leaked Private Browsing Mode details to disk. This vulnerability affects Firefox < 107.(CVE-2022-45417)

If the user added a security exception for an invalid TLS certificate, opened an ongoing TLS connection with a server that used that certificate, and then deleted the exception, Firefox would have kept the connection alive, making it seem like the certificate was still trusted. This vulnerability affects Firefox < 107.(CVE-2022-45419)

Mozilla developers and community members Lukas Bernhard, Gabriele Svelto, Randell Jesup, and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 107. 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 < 108.(CVE-2022-46879)

Mozilla developers Gabriele Svelto, Yulia Startsev, Andrew McCreight and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 106. 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.<br />Note: This advisory was added on December 13th, 2022 after discovering it was inadvertently left out of the original advisory. The fix was included in the original release of Firefox 107. This vulnerability affects Firefox < 107.(CVE-2022-46883)

Due to URL previews in the network panel of developer tools improperly storing URLs, query parameters could potentially be used to overwrite global objects in privileged code. This vulnerability affects Firefox < 110.(CVE-2023-25731)

The return value from gfx::SourceSurfaceSkia::Map() wasn't being verified which could have potentially lead to a null pointer dereference. This vulnerability affects Firefox < 110.(CVE-2023-25733)

An invalid downcast from nsHTMLDocument to nsIContent could have lead to undefined behavior. This vulnerability affects Firefox < 110.(CVE-2023-25736)

Under certain circumstances, a ServiceWorker's offline cache may have leaked to the file system when using private browsing mode. This vulnerability affects Firefox < 111.(CVE-2023-25750)

When following a redirect to a publicly accessible web extension file, the URL may have been translated to the actual local path, leaking potentially sensitive information. This vulnerability affects Firefox < 111.(CVE-2023-28160)

Memory safety bugs present in Firefox 110. 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 < 111.(CVE-2023-28177)

Multiple race conditions in the font initialization could have led to memory corruption…

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

Security Fix(es):

When loading a script with Subresource Integrity, attackers with an injection capability could trigger the reuse of previously cached entries with incorrect, different integrity metadata. This vulnerability affects Firefox < 103.(CVE-2022-36315)

When using the Performance API, an attacker was able to notice subtle differences between PerformanceEntries and thus learn whether the target URL had been subject to a redirect. This vulnerability affects Firefox < 103.(CVE-2022-36316)

An attacker could have written a value to the first element in a zero-length JavaScript array. Although the array was zero-length, the value was not written to an invalid memory address. This vulnerability affects Firefox < 104.(CVE-2022-38475)

Service Workers did not detect Private Browsing Mode correctly in all cases, which could have led to Service Workers being written to disk for websites visited in Private Browsing Mode. This would not have persisted them in a state where they would run again, but it would have leaked Private Browsing Mode details to disk. This vulnerability affects Firefox < 107.(CVE-2022-45417)

If the user added a security exception for an invalid TLS certificate, opened an ongoing TLS connection with a server that used that certificate, and then deleted the exception, Firefox would have kept the connection alive, making it seem like the certificate was still trusted. This vulnerability affects Firefox < 107.(CVE-2022-45419)

Mozilla developers and community members Lukas Bernhard, Gabriele Svelto, Randell Jesup, and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 107. 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 < 108.(CVE-2022-46879)

Mozilla developers Gabriele Svelto, Yulia Startsev, Andrew McCreight and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 106. 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.<br />Note: This advisory was added on December 13th, 2022 after discovering it was inadvertently left out of the original advisory. The fix was included in the original release of Firefox 107. This vulnerability affects Firefox < 107.(CVE-2022-46883)

Due to URL previews in the network panel of developer tools improperly storing URLs, query parameters could potentially be used to overwrite global objects in privileged code. This vulnerability affects Firefox < 110.(CVE-2023-25731)

The return value from gfx::SourceSurfaceSkia::Map() wasn't being verified which could have potentially lead to a null pointer dereference. This vulnerability affects Firefox < 110.(CVE-2023-25733)

An invalid downcast from nsHTMLDocument to nsIContent could have lead to undefined behavior. This vulnerability affects Firefox < 110.(CVE-2023-25736)

Under certain circumstances, a ServiceWorker's offline cache may have leaked to the file system when using private browsing mode. This vulnerability affects Firefox < 111.(CVE-2023-25750)

When following a redirect to a publicly accessible web extension file, the URL may have been translated to the actual local path, leaking potentially sensitive information. This vulnerability affects Firefox < 111.(CVE-2023-28160)

Memory safety bugs present in Firefox 110. 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 < 111.(CVE-2023-28177)

Multiple race conditions in the font initialization could have led to memory corruption…

The black fade animation when exiting fullscreen is roughly the length of the anti-clickjacking delay on permission prompts. It was possible to use this fact to surprise users by luring them to click where the permission grant button would be about to appear. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.

Mozilla Thunderbird is a standalone mail and newsgroup client.

This update upgrades Thunderbird to version 115.5.0.

Security Fix(es):

• Mozilla: Out-of-bound memory access in WebGL2 blitFramebuffer (CVE-2023-6204)
• Mozilla: Use-after-free in MessagePort::Entangled (CVE-2023-6205)
• Mozilla: Clickjacking permission prompts using the fullscreen transition (CVE-2023-6206)
• Mozilla: Use-after-free in ReadableByteStreamQueueEntry::Buffer (CVE-2023-6207)
• Mozilla: Memory safety bugs fixed in Firefox 120, Firefox ESR 115.5, and Thunderbird 115.5 (CVE-2023-6212)
• Mozilla: Using Selection API would copy contents into X11 primary selection. (CVE-2023-6208)
• Mozilla: Incorrect parsing of relative URLs starting with "///" (CVE-2023-6209)

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 115.5.0.

Security Fix(es):

• Mozilla: Out-of-bound memory access in WebGL2 blitFramebuffer (CVE-2023-6204)
• Mozilla: Use-after-free in MessagePort::Entangled (CVE-2023-6205)
• Mozilla: Clickjacking permission prompts using the fullscreen transition (CVE-2023-6206)
• Mozilla: Use-after-free in ReadableByteStreamQueueEntry::Buffer (CVE-2023-6207)
• Mozilla: Memory safety bugs fixed in Firefox 120, Firefox ESR 115.5, and Thunderbird 115.5 (CVE-2023-6212)
• Mozilla: Using Selection API would copy contents into X11 primary selection. (CVE-2023-6208)
• Mozilla: Incorrect parsing of relative URLs starting with "///" (CVE-2023-6209)

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

This update upgrades Firefox to version 115.5.0 ESR.

Security Fix(es):

• Mozilla: Out-of-bound memory access in WebGL2 blitFramebuffer (CVE-2023-6204)
• Mozilla: Use-after-free in MessagePort::Entangled (CVE-2023-6205)
• Mozilla: Clickjacking permission prompts using the fullscreen transition (CVE-2023-6206)
• Mozilla: Use-after-free in ReadableByteStreamQueueEntry::Buffer (CVE-2023-6207)
• Mozilla: Memory safety bugs fixed in Firefox 120, Firefox ESR 115.5, and Thunderbird 115.5 (CVE-2023-6212)
• Mozilla: Using Selection API would copy contents into X11 primary selection. (CVE-2023-6208)
• Mozilla: Incorrect parsing of relative URLs starting with "///" (CVE-2023-6209)

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

This update upgrades Firefox to version 115.5.0 ESR.

Security Fix(es):

• Mozilla: Out-of-bound memory access in WebGL2 blitFramebuffer (CVE-2023-6204)
• Mozilla: Use-after-free in MessagePort::Entangled (CVE-2023-6205)
• Mozilla: Clickjacking permission prompts using the fullscreen transition (CVE-2023-6206)
• Mozilla: Use-after-free in ReadableByteStreamQueueEntry::Buffer (CVE-2023-6207)
• Mozilla: Memory safety bugs fixed in Firefox 120, Firefox ESR 115.5, and Thunderbird 115.5 (CVE-2023-6212)
• Mozilla: Using Selection API would copy contents into X11 primary selection. (CVE-2023-6208)
• Mozilla: Incorrect parsing of relative URLs starting with "///" (CVE-2023-6209)

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.

• rebase from Thunderbird 115.4.1 to 140.12.0 ESR

• CVE-2022-3032: When receiving an HTML email that contained an iframe element, which used a srcdoc attribute to define the inner HTML document, remote objects specified in the nested document, for example images or videos, were not blocked

• CVE-2023-0430: Certificate OCSP revocation status was not checked when verifying S/Mime signatures

• CVE-2023-0547: OCSP revocation status of recipient certificates was not checked when sending S/Mime encrypted email, and revoked certificates would be accepted

• CVE-2023-0616: If a MIME email combines OpenPGP and OpenPGP MIME data in a certain way Thunderbird repeatedly attempts to process and display the message, which could cause Thunderbird's user interface to lock up and no longer respond to the user's actions

• CVE-2023-1945: Unexpected data returned from the Safe Browsing API could have led to memory corruption and a potentially exploitable crash

• CVE-2023-4573: When receiving rendering data over IPC mStream could have been destroyed when initialized, which could have led to a use-after-free causing a potentially exploitable crash

• CVE-2023-4574: When creating a callback over IPC for showing the Color Picker window, multiple of the same callbacks could have been created at a time and eventually all simultaneously destroyed as soon as one of the callbacks finished

• CVE-2023-4575: When creating a callback over IPC for showing the File Picker window, multiple of the same callbacks could have been created at a time and eventually all simultaneously destroyed as soon as one of the callbacks finished

• CVE-2023-4577: When UpdateRegExpStatics attempted to access initialStringHeap it could already have been garbage collected prior to entering the function, which could potentially have led to an exploitable crash

• CVE-2023-4578: When calling JS::CheckRegExpSyntax a Syntax Error could have been set which would end in calling convertToRuntimeErrorAndClear. A path in the function could attempt to allocate memory when none is available which would have caused a newly created Out of Memory exception to be mishandled as a Syntax Error

• CVE-2023-4580: Push notifications stored on disk in private browsing mode were not being encrypted potentially allowing the leak of sensitive information

• CVE-2023-4581: Excel .xll add-in files did not have a blocklist entry in Firefox's executable blocklist which allowed them to be downloaded without any warning of their potential harm

• CVE-2023-5169: A compromised content process could have provided malicious data in a PathRecording resulting in an out-of-bounds write, leading to a potentially exploitable crash in a privileged process

• CVE-2023-5171: During Ion compilation, a Garbage Collection could have resulted in a use-after-free condition, allowing an attacker to write two NUL bytes, and cause a potentially exploitable crash

• CVE-2023-5724: Drivers are not always robust to extremely large draw calls and in some cases this scenario could have led to a crash

• CVE-2023-5725: A malicious installed WebExtension could open arbitrary URLs, which under the right circumstance could be leveraged to collect sensitive user data

• CVE-2023-5732: An attacker could have created a malicious link using bidirectional characters to spoof the location in the address bar when visited

• CVE-2023-6204: On some systems—depending on the graphics settings and drivers—it was possible to force an out-of-bounds read and leak memory data into the images created on the canvas element

• CVE-2023-6205: It was possible to cause the use of a MessagePort after it had already been freed, which could potentially have led to an exploitable crash

• CVE-2023-6206: The black fade animation when exiting fullscreen is roughly the length of the anti-clickjacking delay on permission prompts

• CVE-2023-6207: Ownership…

The updated packages fix security vulnerabilities.

Out-of-bound memory access in WebGL2 blitFramebuffer. (CVE-2023-6204)

Use-after-free in MessagePort::Entangled. (CVE-2023-6205)

Clickjacking permission prompts using the fullscreen transition. (CVE-2023-6206)

Use-after-free in ReadableByteStreamQueueEntry::Buffer. (CVE-2023-6207)

Using Selection API would copy contents into X11 primary selection. (CVE-2023-6208)

Incorrect parsing of relative URLs starting with "///". (CVE-2023-6209)

Memory safety bugs fixed in Firefox 120, Firefox ESR 115.5, and Thunderbird 115.5. (CVE-2023-6212)

The updated packages fix security vulnerabilities.

Out-of-bound memory access in WebGL2 blitFramebuffer. (CVE-2023-6204)

Use-after-free in MessagePort::Entangled. (CVE-2023-6205)

Clickjacking permission prompts using the fullscreen transition. (CVE-2023-6206)

Use-after-free in ReadableByteStreamQueueEntry::Buffer. (CVE-2023-6207)

Using Selection API would copy contents into X11 primary selection. (CVE-2023-6208)

Incorrect parsing of relative URLs starting with "///". (CVE-2023-6209)

Memory safety bugs fixed in Firefox 120, Firefox ESR 115.5, and Thunderbird 115.5. (CVE-2023-6212)

These are all security issues fixed in the MozillaThunderbird-115.5.0-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the MozillaFirefox-120.0-1.1 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.

Mozilla Thunderbird is a standalone mail and newsgroup client.

This update upgrades Thunderbird to version 115.5.0.

Security Fix(es):

• Mozilla: Out-of-bound memory access in WebGL2 blitFramebuffer (CVE-2023-6204)

• Mozilla: Use-after-free in MessagePort::Entangled (CVE-2023-6205)

• Mozilla: Clickjacking permission prompts using the fullscreen transition (CVE-2023-6206)

• Mozilla: Use-after-free in ReadableByteStreamQueueEntry::Buffer (CVE-2023-6207)

• Mozilla: Memory safety bugs fixed in Firefox 120, Firefox ESR 115.5, and Thunderbird 115.5 (CVE-2023-6212)

• Mozilla: Using Selection API would copy contents into X11 primary selection. (CVE-2023-6208)

• Mozilla: Incorrect parsing of relative URLs starting with "///" (CVE-2023-6209)

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.

This update for MozillaThunderbird fixes the following issues:

• Mozilla Thunderbird 115.5.0 MFSA 2023-52 (bsc#1217230)

  • CVE-2023-6204: Out-of-bound memory access in WebGL2 blitFramebuffer
  • CVE-2023-6205: Use-after-free in MessagePort::Entangled
  • CVE-2023-6206: Clickjacking permission prompts using the fullscreen transition
  • CVE-2023-6207: Use-after-free in ReadableByteStreamQueueEntry::Buffer
  • CVE-2023-6208: Using Selection API would copy contents into X11 primary selection.
  • CVE-2023-6209: Incorrect parsing of relative URLs starting with '///'
  • CVE-2023-6212: Memory safety bugs

This update for MozillaFirefox fixes the following issues:

• Firefox Extended Support Release 115.6.0 ESR changelog-entry (bsc#1217974)

  • CVE-2023-6856: Heap-buffer-overflow affecting WebGL DrawElementsInstanced method with Mesa VM driver (bmo#1843782).
  • CVE-2023-6857: Symlinks may resolve to smaller than expected buffers (bmo#1796023).
  • CVE-2023-6858: Heap buffer overflow in nsTextFragment (bmo#1826791).
  • CVE-2023-6859: Use-after-free in PR_GetIdentitiesLayer (bmo#1840144).
  • CVE-2023-6860: Potential sandbox escape due to VideoBridge lack of texture validation (bmo#1854669).
  • CVE-2023-6861: Heap buffer overflow affected nsWindow::PickerOpen(void) in headless mode (bmo#1864118).
  • CVE-2023-6862: Use-after-free in nsDNSService (bsc#1868042).
  • CVE-2023-6863: Undefined behavior in ShutdownObserver() (bmo#1868901).
  • CVE-2023-6864: Memory safety bugs fixed in Firefox 121, Firefox ESR 115.6, and Thunderbird 115.6.
  • CVE-2023-6865: Potential exposure of uninitialized data in EncryptingOutputStream (bmo#1864123).
  • CVE-2023-6867: Clickjacking permission prompts using the popup transition (bmo#1863863).

• Fixed: Various security fixes and other quality improvements MFSA 2023-50 (bsc#1217230)

  • CVE-2023-6204 (bmo#1841050) Out-of-bound memory access in WebGL2 blitFramebuffer
  • CVE-2023-6205 (bmo#1854076) Use-after-free in MessagePort::Entangled
  • CVE-2023-6206 (bmo#1857430) Clickjacking permission prompts using the fullscreen transition
  • CVE-2023-6207 (bmo#1861344) Use-after-free in ReadableByteStreamQueueEntry::Buffer
  • CVE-2023-6208 (bmo#1855345) Using Selection API would copy contents into X11 primary selection.
  • CVE-2023-6209 (bmo#1858570) Incorrect parsing of relative URLs starting with '///'
  • CVE-2023-6212 (bmo#1658432, bmo#1820983, bmo#1829252, bmo#1856072, bmo#1856091, bmo#1859030, bmo#1860943, bmo#1862782) Memory safety bugs fixed in Firefox 120, Firefox ESR 115.5, and Thunderbird 115.5

This update for MozillaFirefox fixes the following issues:

• Firefox Extended Support Release 115.6.0 ESR changelog-entry (bsc#1217974).

  • CVE-2023-6856: Heap-buffer-overflow affecting WebGL DrawElementsInstanced method with Mesa VM driver (bmo#1843782).
  • CVE-2023-6857: Symlinks may resolve to smaller than expected buffers (bmo#1796023).
  • CVE-2023-6858: Heap buffer overflow in nsTextFragment (bmo#1826791).
  • CVE-2023-6859: Use-after-free in PR_GetIdentitiesLayer (bmo#1840144).
  • CVE-2023-6860: Potential sandbox escape due to VideoBridge lack of texture validation (bmo#1854669).
  • CVE-2023-6861: Heap buffer overflow affected nsWindow::PickerOpen(void) in headless mode (bmo#1864118).
  • CVE-2023-6862: Use-after-free in nsDNSService (bsc#1868042).
  • CVE-2023-6863: Undefined behavior in ShutdownObserver() (bmo#1868901).
  • CVE-2023-6864: Memory safety bugs fixed in Firefox 121, Firefox ESR 115.6, and Thunderbird 115.6.
  • CVE-2023-6865: Potential exposure of uninitialized data in EncryptingOutputStream (bmo#1864123).
  • CVE-2023-6867: Clickjacking permission prompts using the popup transition (bmo#1863863).

• Fixed: Various security fixes and other quality improvements MFSA 2023-50 (bsc#1217230)

  • CVE-2023-6204 (bmo#1841050) Out-of-bound memory access in WebGL2 blitFramebuffer
  • CVE-2023-6205 (bmo#1854076) Use-after-free in MessagePort::Entangled
  • CVE-2023-6206 (bmo#1857430) Clickjacking permission prompts using the fullscreen transition
  • CVE-2023-6207 (bmo#1861344) Use-after-free in ReadableByteStreamQueueEntry::Buffer
  • CVE-2023-6208 (bmo#1855345) Using Selection API would copy contents into X11 primary selection.
  • CVE-2023-6209 (bmo#1858570) Incorrect parsing of relative URLs starting with '///'
  • CVE-2023-6212 (bmo#1658432, bmo#1820983, bmo#1829252, bmo#1856072, bmo#1856091, bmo#1859030, bmo#1860943, bmo#1862782) Memory safety bugs fixed in Firefox 120, Firefox ESR 115.5, and Thunderbird 115.5

This update for MozillaFirefox fixes the following issues:

Firefox Extended Support Release 115.6.0 ESR changelog-entry (bsc#1217974)

• CVE-2023-6856: Heap-buffer-overflow affecting WebGL DrawElementsInstanced method with Mesa VM driver (bmo#1843782).
• CVE-2023-6857: Symlinks may resolve to smaller than expected buffers (bmo#1796023).
• CVE-2023-6858: Heap buffer overflow in nsTextFragment (bmo#1826791).
• CVE-2023-6859: Use-after-free in PR_GetIdentitiesLayer (bmo#1840144).
• CVE-2023-6860: Potential sandbox escape due to VideoBridge lack of texture validation (bmo#1854669).
• CVE-2023-6861: Heap buffer overflow affected nsWindow::PickerOpen(void) in headless mode (bmo#1864118).
• CVE-2023-6862: Use-after-free in nsDNSService (bsc#1868042).
• CVE-2023-6863: Undefined behavior in ShutdownObserver() (bmo#1868901).
• CVE-2023-6864: Memory safety bugs fixed in Firefox 121, Firefox ESR 115.6, and Thunderbird 115.6.
• CVE-2023-6865: Potential exposure of uninitialized data in EncryptingOutputStream (bmo#1864123).
• CVE-2023-6867: Clickjacking permission prompts using the popup transition (bmo#1863863).

Fixed: Various security fixes and other quality improvements MFSA 2023-50 (bsc#1217230)

• CVE-2023-6204 (bmo#1841050) Out-of-bound memory access in WebGL2 blitFramebuffer
• CVE-2023-6205 (bmo#1854076) Use-after-free in MessagePort::Entangled
• CVE-2023-6206 (bmo#1857430) Clickjacking permission prompts using the fullscreen transition
• CVE-2023-6207 (bmo#1861344) Use-after-free in ReadableByteStreamQueueEntry::Buffer
• CVE-2023-6208 (bmo#1855345) Using Selection API would copy contents into X11 primary selection.
• CVE-2023-6209 (bmo#1858570) Incorrect parsing of relative URLs starting with '///'
• CVE-2023-6212 (bmo#1658432, bmo#1820983, bmo#1829252, bmo#1856072, bmo#1856091, bmo#1859030, bmo#1860943, bmo#1862782) Memory safety bugs fixed in Firefox 120, Firefox ESR 115.5, and Thunderbird 115.5

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 across domains, or execute arbitrary code. (CVE-2023-6206, CVE-2023-6210, CVE-2023-6211, CVE-2023-6212, CVE-2023-6213)

It was discovered that Firefox did not properly manage memory when images were created on the canvas element. An attacker could potentially exploit this issue to obtain sensitive information. (CVE-2023-6204)

It discovered that Firefox incorrectly handled certain memory when using a MessagePort. An attacker could potentially exploit this issue to cause a denial of service. (CVE-2023-6205)

It discovered that Firefox incorrectly did not properly manage ownership in ReadableByteStreams. An attacker could potentially exploit this issue to cause a denial of service. (CVE-2023-6207)

It discovered that Firefox incorrectly did not properly manage copy operations when using Selection API in X11. An attacker could potentially exploit this issue to obtain sensitive information. (CVE-2023-6208)

Rachmat Abdul Rokhim discovered that Firefox incorrectly handled parsing of relative URLS starting with "///". An attacker could potentially exploit this issue to cause a denial of service. (CVE-2023-6209)

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, bypass security restrictions, cross-site tracing, or execute arbitrary code. (CVE-2023-6206, CVE-2023-6212)

It was discovered that Thudnerbird did not properly manage memory when images were created on the canvas element. An attacker could potentially exploit this issue to obtain sensitive information. (CVE-2023-6204)

It discovered that Thunderbird incorrectly handled certain memory when using a MessagePort. An attacker could potentially exploit this issue to cause a denial of service. (CVE-2023-6205)

It discovered that Thunderbird incorrectly did not properly manage ownership in ReadableByteStreams. An attacker could potentially exploit this issue to cause a denial of service. (CVE-2023-6207)

It discovered that Thudnerbird incorrectly did not properly manage copy operations when using Selection API in X11. An attacker could potentially exploit this issue to obtain sensitive information. (CVE-2023-6208)

Rachmat Abdul Rokhim discovered that Thunderbird incorrectly handled parsing of relative URLS starting with "///". An attacker could potentially exploit this issue to cause a denial of service. (CVE-2023-6209)