CVE-2023-6861

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.

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…

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.

Mozilla Thunderbird is a standalone mail and newsgroup client.

This update upgrades Thunderbird to version 115.6.0.

Security Fix(es):

• Mozilla: Heap-buffer-overflow affecting WebGL <code>DrawElementsInstanced</code> method with Mesa VM driver (CVE-2023-6856)
• Mozilla: Memory safety bugs fixed in Firefox 121, Firefox ESR 115.6, and Thunderbird 115.6 (CVE-2023-6864)
• Mozilla: S/MIME signature accepted despite mismatching message date (CVE-2023-50761)
• Mozilla: Truncated signed text was shown with a valid OpenPGP signature (CVE-2023-50762)
• Mozilla: Symlinks may resolve to smaller than expected buffers (CVE-2023-6857)
• Mozilla: Heap buffer overflow in <code>nsTextFragment</code> (CVE-2023-6858)
• Mozilla: Use-after-free in PR_GetIdentitiesLayer (CVE-2023-6859)
• Mozilla: Potential sandbox escape due to <code>VideoBridge</code> lack of texture validation (CVE-2023-6860)
• Mozilla: Heap buffer overflow affected <code>nsWindow::PickerOpen(void)</code> in headless mode (CVE-2023-6861)
• Mozilla: Use-after-free in <code>nsDNSService</code> (CVE-2023-6862)
• Mozilla: Undefined behavior in <code>ShutdownObserver()</code> (CVE-2023-6863)

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 115.6.0.

Security Fix(es):

• Mozilla: Heap-buffer-overflow affecting WebGL <code>DrawElementsInstanced</code> method with Mesa VM driver (CVE-2023-6856)
• Mozilla: Memory safety bugs fixed in Firefox 121, Firefox ESR 115.6, and Thunderbird 115.6 (CVE-2023-6864)
• Mozilla: S/MIME signature accepted despite mismatching message date (CVE-2023-50761)
• Mozilla: Truncated signed text was shown with a valid OpenPGP signature (CVE-2023-50762)
• Mozilla: Symlinks may resolve to smaller than expected buffers (CVE-2023-6857)
• Mozilla: Heap buffer overflow in <code>nsTextFragment</code> (CVE-2023-6858)
• Mozilla: Use-after-free in PR_GetIdentitiesLayer (CVE-2023-6859)
• Mozilla: Potential sandbox escape due to <code>VideoBridge</code> lack of texture validation (CVE-2023-6860)
• Mozilla: Heap buffer overflow affected <code>nsWindow::PickerOpen(void)</code> in headless mode (CVE-2023-6861)
• Mozilla: Use-after-free in <code>nsDNSService</code> (CVE-2023-6862)
• Mozilla: Undefined behavior in <code>ShutdownObserver()</code> (CVE-2023-6863)

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 115.6.0 ESR.

Security Fix(es):

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

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 115.6.0 ESR.

Security Fix(es):

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

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.

The updated packages fix security vulnerabilities: Truncated signed text was shown with a valid OpenPGP signature. (CVE-2023-50762) S/MIME signature accepted despite mismatching message date. (CVE-2023-50761) Heap-buffer-overflow affecting WebGL DrawElementsInstanced method with Mesa VM driver. (CVE-2023-6856) Symlinks may resolve to smaller than expected buffers. (CVE-2023-6857) Heap buffer overflow in nsTextFragment. (CVE-2023-6858) Use-after-free in PR_GetIdentitiesLayer. (CVE-2023-6859) Potential sandbox escape due to VideoBridge lack of texture validation. (CVE-2023-6860) Heap buffer overflow affected nsWindow::PickerOpen(void) in headless mode. (CVE-2023-6861) Use-after-free in nsDNSService. (CVE-2023-6862) Undefined behavior in ShutdownObserver(). (CVE-2023-6863) Memory safety bugs fixed in Firefox 121, Firefox ESR 115.6, and Thunderbird 115.6. (CVE-2023-6864)

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

These are all security issues fixed in the MozillaThunderbird-115.6.0-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the MozillaFirefox-121.0-1.1 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 115.6.0.

Security Fix(es):

• Mozilla: Heap-buffer-overflow affecting WebGL <code>DrawElementsInstanced</code> method with Mesa VM driver (CVE-2023-6856)

• Mozilla: Memory safety bugs fixed in Firefox 121, Firefox ESR 115.6, and Thunderbird 115.6 (CVE-2023-6864)

• Mozilla: S/MIME signature accepted despite mismatching message date (CVE-2023-50761)

• Mozilla: Truncated signed text was shown with a valid OpenPGP signature (CVE-2023-50762)

• Mozilla: Symlinks may resolve to smaller than expected buffers (CVE-2023-6857)

• Mozilla: Heap buffer overflow in <code>nsTextFragment</code> (CVE-2023-6858)

• Mozilla: Use-after-free in PR_GetIdentitiesLayer (CVE-2023-6859)

• Mozilla: Potential sandbox escape due to <code>VideoBridge</code> lack of texture validation (CVE-2023-6860)

• Mozilla: Heap buffer overflow affected <code>nsWindow::PickerOpen(void)</code> in headless mode (CVE-2023-6861)

• Mozilla: Use-after-free in <code>nsDNSService</code> (CVE-2023-6862)

• Mozilla: Undefined behavior in <code>ShutdownObserver()</code> (CVE-2023-6863)

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 115.6.0 ESR.

Security Fix(es):

• Mozilla: Heap-buffer-overflow affecting WebGL <code>DrawElementsInstanced</code> method with Mesa VM driver (CVE-2023-6856)

• Mozilla: Memory safety bugs fixed in Firefox 121, Firefox ESR 115.6, and Thunderbird 115.6 (CVE-2023-6864)

• Mozilla: Potential exposure of uninitialized data in <code>EncryptingOutputStream</code> (CVE-2023-6865)

• Mozilla: Symlinks may resolve to smaller than expected buffers (CVE-2023-6857)

• Mozilla: Heap buffer overflow in <code>nsTextFragment</code> (CVE-2023-6858)

• Mozilla: Use-after-free in PR_GetIdentitiesLayer (CVE-2023-6859)

• Mozilla: Potential sandbox escape due to <code>VideoBridge</code> lack of texture validation (CVE-2023-6860)

• Mozilla: Heap buffer overflow affected <code>nsWindow::PickerOpen(void)</code> in headless mode (CVE-2023-6861)

• Mozilla: Use-after-free in <code>nsDNSService</code> (CVE-2023-6862)

• Mozilla: Clickjacking permission prompts using the popup transition (CVE-2023-6867)

• Mozilla: Undefined behavior in <code>ShutdownObserver()</code> (CVE-2023-6863)

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 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

This update for MozillaThunderbird fixes the following issues:

Firefox Extended Support Release 115.6.0 ESR (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-2023-50762: Truncated signed text was shown with a valid OpenPGP signature (bmo#1862625).

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-2023-6865, CVE-2023-6857, CVE-2023-6858, CVE-2023-6859, CVE-2023-6866, CVE-2023-6867, CVE-2023-6861, CVE-2023-6869, CVE-2023-6871, CVE-2023-6872, CVE-2023-6863, CVE-2023-6864, CVE-2023-6873)

DoHyun Lee discovered that Firefox did not properly manage memory when used on systems with the Mesa VM driver. An attacker could potentially exploit this issue to execute arbitrary code. (CVE-2023-6856)

George Pantela and Hubert Kario discovered that Firefox using multiple NSS NIST curves which were susceptible to a side-channel attack known as "Minerva". An attacker could potentially exploit this issue to obtain sensitive information. (CVE-2023-6135)

Andrew Osmond discovered that Firefox did not properly validate the textures produced by remote decoders. An attacker could potentially exploit this issue to escape the sandbox. (CVE-2023-6860)

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-2023-6857, CVE-2023-6858, CVE-2023-6859, CVE-2023-6861, CVE-2023-6862, CVE-2023-6863, CVE-2023-6864)

Marcus Brinkmann discovered that Thunderbird did not properly parse a PGP/MIME payload that contains digitally signed text. An attacker could potentially exploit this issue to spoof an email message. (CVE-2023-50762)

Marcus Brinkmann discovered that Thunderbird did not properly compare the signature creation date with the message date and time when using digitally signed S/MIME email message. An attacker could potentially exploit this issue to spoof date and time of an email message. (CVE-2023-50761)

DoHyun Lee discovered that Thunderbird did not properly manage memory when used on systems with the Mesa VM driver. An attacker could potentially exploit this issue to execute arbitrary code. (CVE-2023-6856)

Andrew Osmond discovered that Thunderbird did not properly validate the textures produced by remote decoders. An attacker could potentially exploit this issue to escape the sandbox. (CVE-2023-6860)