CVE-2023-6212

Memory safety bugs present in Firefox 119, Firefox ESR 115.4, and Thunderbird 115.4. 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 < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance and portability. %if 0 %global moz_debug_prefix /lib/debug %global moz_debug_dir /lib/debug/ %global uname_m %(uname -m) %global symbols_file_name -.en-US.-%(uname.crashreporter-symbols.zip %global symbols_file_path /lib/debug//-.en-US.-%(uname.crashreporter-symbols.zip %global _find_debuginfo_opts -p /lib/debug//-.en-US.-%(uname.crashreporter-symbols.zip -o debugcrashreporter.list %global crashreporter_pkg_name mozilla-crashreporter--debuginfo

Security Fix(es):

Multiple NSS NIST curves were susceptible to a side-channel attack known as "Minerva". This attack could potentially allow an attacker to recover the private key. This vulnerability affects Firefox < 121.(CVE-2023-6135)

Ownership mismanagement led to a use-after-free in ReadableByteStreams This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.(CVE-2023-6207)

When using X11, text selected by the page using the Selection API was erroneously copied into the primary selection, a temporary storage not unlike the clipboard. This bug only affects Firefox on X11. Other systems are unaffected. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.(CVE-2023-6208)

Relative URLs starting with three slashes were incorrectly parsed, and a path-traversal "/../" part in the path could be used to override the specified host. This could contribute to security problems in web sites. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.(CVE-2023-6209)

When an https: web page created a pop-up from a "javascript:" URL, that pop-up was incorrectly allowed to load blockable content such as iframes from insecure http: URLs This vulnerability affects Firefox < 120.(CVE-2023-6210)

If an attacker needed a user to load an insecure http: page and knew that user had enabled HTTPS-only mode, the attacker could have tricked the user into clicking to grant an HTTPS-only exception if they could get the user to participate in a clicking game. This vulnerability affects Firefox < 120.(CVE-2023-6211)

Memory safety bugs present in Firefox 119, Firefox ESR 115.4, and Thunderbird 115.4. 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 < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.(CVE-2023-6212)

Memory safety bugs present in Firefox 119. 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 < 120.(CVE-2023-6213)

The WebGL DrawElementsInstanced method was susceptible to a heap buffer overflow when used on systems with the Mesa VM driver. This issue could allow an attacker to perform remote code execution and sandbox escape. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.(CVE-2023-6856)

When resolving a symlink, a race may occur where the buffer passed to readlink may actually be smaller than necessary. This bug only affects Firefox on Unix-based operating systems (Android, Linux, MacOS). Windows is unaffected. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.(CVE-2023-6857)

Firefox was susceptible to a heap buffer overflow in nsTextFragment due to insufficient OOM handling. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.(CVE-2023-6858)

The nsWindow::PickerOpen(void) method was susceptible to a heap buffer overflow when running in headless mode. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.(CVE-2023-6861)

A use-after-free was…

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance and portability. %if 0 %global moz_debug_prefix /lib/debug %global moz_debug_dir /lib/debug/ %global uname_m %(uname -m) %global symbols_file_name -.en-US.-%(uname.crashreporter-symbols.zip %global symbols_file_path /lib/debug//-.en-US.-%(uname.crashreporter-symbols.zip %global _find_debuginfo_opts -p /lib/debug//-.en-US.-%(uname.crashreporter-symbols.zip -o debugcrashreporter.list %global crashreporter_pkg_name mozilla-crashreporter--debuginfo

Security Fix(es):

Multiple NSS NIST curves were susceptible to a side-channel attack known as "Minerva". This attack could potentially allow an attacker to recover the private key. This vulnerability affects Firefox < 121.(CVE-2023-6135)

Ownership mismanagement led to a use-after-free in ReadableByteStreams This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.(CVE-2023-6207)

When using X11, text selected by the page using the Selection API was erroneously copied into the primary selection, a temporary storage not unlike the clipboard. This bug only affects Firefox on X11. Other systems are unaffected. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.(CVE-2023-6208)

Relative URLs starting with three slashes were incorrectly parsed, and a path-traversal "/../" part in the path could be used to override the specified host. This could contribute to security problems in web sites. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.(CVE-2023-6209)

When an https: web page created a pop-up from a "javascript:" URL, that pop-up was incorrectly allowed to load blockable content such as iframes from insecure http: URLs This vulnerability affects Firefox < 120.(CVE-2023-6210)

If an attacker needed a user to load an insecure http: page and knew that user had enabled HTTPS-only mode, the attacker could have tricked the user into clicking to grant an HTTPS-only exception if they could get the user to participate in a clicking game. This vulnerability affects Firefox < 120.(CVE-2023-6211)

Memory safety bugs present in Firefox 119, Firefox ESR 115.4, and Thunderbird 115.4. 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 < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.(CVE-2023-6212)

Memory safety bugs present in Firefox 119. 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 < 120.(CVE-2023-6213)

The WebGL DrawElementsInstanced method was susceptible to a heap buffer overflow when used on systems with the Mesa VM driver. This issue could allow an attacker to perform remote code execution and sandbox escape. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.(CVE-2023-6856)

When resolving a symlink, a race may occur where the buffer passed to readlink may actually be smaller than necessary. This bug only affects Firefox on Unix-based operating systems (Android, Linux, MacOS). Windows is unaffected. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.(CVE-2023-6857)

Firefox was susceptible to a heap buffer overflow in nsTextFragment due to insufficient OOM handling. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.(CVE-2023-6858)

The nsWindow::PickerOpen(void) method was susceptible to a heap buffer overflow when running in headless mode. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.(CVE-2023-6861)

A use-after-free was…

Memory safety bugs present in Firefox 119, Firefox ESR 115.4, and Thunderbird 115.4. 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 < 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)