CVE-2020-15673

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.

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 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.

Mozilla developer Jason Kratzer reported memory safety bugs present in 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 (CVE-2020-15673).

Firefox sometimes ran the onload handler for SVG elements that the DOM sanitizer decided to remove, resulting in a XSS issue due to JavaScript being executed after pasting attacker-controlled data into a contenteditable element (CVE-2020-15676).

By exploiting an Open Redirect vulnerability on a website, an attacker could have spoofed the site displayed in the download file dialog to show the original site (the one suffering from the open redirect) rather than the site the file was actually downloaded from (CVE-2020-15677).

When recursing through graphical layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free. This occurs because the function APZCTreeManager::ComputeClippedCompositionBounds did not follow iterator invalidation rules (CVE-2020-15678).

The firefox package has been updated to the 78.x ESR branch, which brings significant changes in how CA certificates and smart cards are loaded into Firefox.

The root CA certificates are no longer statically built into the nss library. They are loaded dynamically via p11-kit-trust, and therefore may be modified by the system administrator. Smart card support should be automatically loaded via p11-kit-trust as well, rather than requiring opensc to be manually loaded. NSS also now complies with the system crypto policy, which is provided by the crypto-policies package. See the fedoraproject references for details.

AppCache manifest poisoning due to url encoded character processing (CVE-2020-12415).

Use-after-free in WebRTC VideoBroadcaster (CVE-2020-12416).

Integer overflow in nsJPEGEncoder::emptyOutputBuffer (CVE-2020-12422).

WebRTC permission prompt could have been bypassed by a compromised content process (CVE-2020-12424).

Out of bound read in Date.parse() (CVE-2020-12425).

Memory safety bugs fixed in Thunderbird 78 (CVE-2020-12426).

X-Frame-Options bypass using object or embed tags (CVE-2020-15648).

Memory safety bugs fixed in Thunderbird 78.3 (CVE-2020-15673).

XSS when pasting attacker-controlled data into a contenteditable element (CVE-2020-15676).

Download origin spoofing via redirect (CVE-2020-15677).

When recursing through layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free scenario (CVE-2020-15678).

Note that Enigmail will no longer let you manage your PGP keys, but instead will only provide a migration tool. Thunderbird will no longer use the system keyring and GnuPG; instead, it will handle PGP keys internally.

To use your existing PGP keys with Thunderbird 78 and above, you must use the migration tool from Enigmail upon the first Thunderbird run. See the migration notes on the Mageia wiki.

Also note that, to protect your keys, you should define a master password in Thunderbird.

This update for MozillaFirefox fixes the following issues:

-Firefox was updated to 78.3.0 ESR (bsc#1176756, MFSA 2020-43)

• CVE-2020-15677: Download origin spoofing via redirect
• CVE-2020-15676: Fixed an XSS when pasting attacker-controlled data into a contenteditable element
• CVE-2020-15678: When recursing through layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free scenario
• CVE-2020-15673: Fixed memory safety bugs
• Enhance fix for wayland-detection (bsc#1174420)
• Attempt to fix langpack-parallelization by introducing separate obj-dirs for each lang (bsc#1173986, bsc#1167976)

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

This update for MozillaFirefox fixes the following issues:

-Firefox was updated to 78.3.0 ESR (bsc#1176756, MFSA 2020-43)

• CVE-2020-15677: Download origin spoofing via redirect
• CVE-2020-15676: Fixed an XSS when pasting attacker-controlled data into a contenteditable element
• CVE-2020-15678: When recursing through layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free scenario
• CVE-2020-15673: Fixed memory safety bugs
• Enhance fix for wayland-detection (bsc#1174420)
• Attempt to fix langpack-parallelization by introducing separate obj-dirs for each lang (bsc#1173986, bsc#1167976)

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

This update for MozillaThunderbird and mozilla-nspr fixes the following issues:

• Mozilla Thunderbird 78.4

  • new: MailExtensions: browser.tabs.sendMessage API added
  • new: MailExtensions: messageDisplayScripts API added
  • changed: Yahoo and AOL mail users using password authentication will be migrated to OAuth2
  • changed: MailExtensions: messageDisplay APIs extended to support multiple selected messages
  • changed: MailExtensions: compose.begin functions now support creating a message with attachments
  • fixed: Thunderbird could freeze when updating global search index
  • fixed: Multiple issues with handling of self-signed SSL certificates addressed
  • fixed: Recipient address fields in compose window could expand to fill all available space
  • fixed: Inserting emoji characters in message compose window caused unexpected behavior
  • fixed: Button to restore default folder icon color was not keyboard accessible
  • fixed: Various keyboard navigation fixes
  • fixed: Various color-related theme fixes
  • fixed: MailExtensions: Updating attachments with onBeforeSend.addListener() did not work MFSA 2020-47 (bsc#1177977)
  • CVE-2020-15969 Use-after-free in usersctp
  • CVE-2020-15683 Memory safety bugs fixed in Thunderbird 78.4

• Mozilla Thunderbird 78.3.3

  • OpenPGP: Improved support for encrypting with subkeys
  • OpenPGP message status icons were not visible in message header pane
  • Creating a new calendar event did not require an event title

• Mozilla Thunderbird 78.3.2 (bsc#1176899)

  • OpenPGP: Improved support for encrypting with subkeys
  • OpenPGP: Encrypted messages with international characters were sometimes displayed incorrectly
  • Single-click deletion of recipient pills with middle mouse button restored
  • Searching an address book list did not display results
  • Dark mode, high contrast, and Windows theming fixes

• Mozilla Thunderbird 78.3.1

  • fix crash in nsImapProtocol::CreateNewLineFromSocket

• Mozilla Thunderbird 78.3.0 MFSA 2020-44 (bsc#1176756)

  • CVE-2020-15677 Download origin spoofing via redirect
  • CVE-2020-15676 XSS when pasting attacker-controlled data into a contenteditable element
  • CVE-2020-15678 When recursing through layers while scrolling, an iterator may have become invalid, resulting in a potential use-after- free scenario
  • CVE-2020-15673 Memory safety bugs fixed in Thunderbird 78.3

• update mozilla-nspr to version 4.25.1

  • The macOS platform code for shared library loading was changed to support macOS 11.
  • Dependency needed for the MozillaThunderbird udpate

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

This update for MozillaThunderbird and mozilla-nspr fixes the following issues:

• Mozilla Thunderbird 78.4

  • new: MailExtensions: browser.tabs.sendMessage API added
  • new: MailExtensions: messageDisplayScripts API added
  • changed: Yahoo and AOL mail users using password authentication will be migrated to OAuth2
  • changed: MailExtensions: messageDisplay APIs extended to support multiple selected messages
  • changed: MailExtensions: compose.begin functions now support creating a message with attachments
  • fixed: Thunderbird could freeze when updating global search index
  • fixed: Multiple issues with handling of self-signed SSL certificates addressed
  • fixed: Recipient address fields in compose window could expand to fill all available space
  • fixed: Inserting emoji characters in message compose window caused unexpected behavior
  • fixed: Button to restore default folder icon color was not keyboard accessible
  • fixed: Various keyboard navigation fixes
  • fixed: Various color-related theme fixes
  • fixed: MailExtensions: Updating attachments with onBeforeSend.addListener() did not work MFSA 2020-47 (bsc#1177977)
  • CVE-2020-15969 Use-after-free in usersctp
  • CVE-2020-15683 Memory safety bugs fixed in Thunderbird 78.4

• Mozilla Thunderbird 78.3.3

  • OpenPGP: Improved support for encrypting with subkeys
  • OpenPGP message status icons were not visible in message header pane
  • Creating a new calendar event did not require an event title

• Mozilla Thunderbird 78.3.2 (bsc#1176899)

  • OpenPGP: Improved support for encrypting with subkeys
  • OpenPGP: Encrypted messages with international characters were sometimes displayed incorrectly
  • Single-click deletion of recipient pills with middle mouse button restored
  • Searching an address book list did not display results
  • Dark mode, high contrast, and Windows theming fixes

• Mozilla Thunderbird 78.3.1

  • fix crash in nsImapProtocol::CreateNewLineFromSocket

• Mozilla Thunderbird 78.3.0 MFSA 2020-44 (bsc#1176756)

  • CVE-2020-15677 Download origin spoofing via redirect
  • CVE-2020-15676 XSS when pasting attacker-controlled data into a contenteditable element
  • CVE-2020-15678 When recursing through layers while scrolling, an iterator may have become invalid, resulting in a potential use-after- free scenario
  • CVE-2020-15673 Memory safety bugs fixed in Thunderbird 78.3

• update mozilla-nspr to version 4.25.1

  • The macOS platform code for shared library loading was changed to support macOS 11.
  • Dependency needed for the MozillaThunderbird udpate

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

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 was updated to 78.3.0 ESR (bsc#1176756, MFSA 2020-43)
  • CVE-2020-15677: Download origin spoofing via redirect
  • CVE-2020-15676: Fixed an XSS when pasting attacker-controlled data into a contenteditable element
  • CVE-2020-15678: When recursing through layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free scenario
  • CVE-2020-15673: Fixed memory safety bugs
• Attempt to fix langpack-parallelization by introducing separate obj-dirs for each lang (bsc#1173986, bsc#1167976)
• Fixed problems with compiler builtins on SLE-11 (bsc#1175046)

This update for MozillaFirefox fixes the following issues:

-Firefox was updated to 78.3.0 ESR (bsc#1176756, MFSA 2020-43)

• CVE-2020-15677: Download origin spoofing via redirect
• CVE-2020-15676: Fixed an XSS when pasting attacker-controlled data into a contenteditable element
• CVE-2020-15678: When recursing through layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free scenario
• CVE-2020-15673: Fixed memory safety bugs
• Enhance fix for wayland-detection (bsc#1174420)
• Attempt to fix langpack-parallelization by introducing separate obj-dirs for each lang (bsc#1173986, bsc#1167976)

This update for MozillaFirefox fixes the following issues:

• Firefox was updated to 78.3.0 ESR (bsc#1176756, MFSA 2020-43)

  • CVE-2020-15677: Download origin spoofing via redirect
  • CVE-2020-15676: Fixed an XSS when pasting attacker-controlled data into a contenteditable element
  • CVE-2020-15678: When recursing through layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free scenario
  • CVE-2020-15673: Fixed memory safety bugs

• Enhance fix for wayland-detection (bsc#1174420)

• Attempt to fix langpack-parallelization by introducing separate obj-dirs for each lang (bsc#1173986, bsc#1167976)

• Firefox was updated to 78.2.0 ESR (bsc#1175686, MFSA 2020-38)

  • CVE-2020-15663: Downgrade attack on the Mozilla Maintenance Service could have resulted in escalation of privilege
  • CVE-2020-15664: Attacker-induced prompt for extension installation
  • CVE-2020-15670: Fixed memory safety bugs fixed in Firefox 80 and Firefox ESR 78.2

• Fixed Firefox tab crash in FIPS mode (bsc#1174284).

• Fixed broken translation-loading (bsc#1173991)

  • allow addon sideloading
  • mark signatures for langpacks non-mandatory
  • do not autodisable user profile scopes

• Google API key is not usable for geolocation service any more

This update for MozillaFirefox fixes the following issues:

-Firefox was updated to 78.3.0 ESR (bsc#1176756, MFSA 2020-43)

• CVE-2020-15677: Download origin spoofing via redirect
• CVE-2020-15676: Fixed an XSS when pasting attacker-controlled data into a contenteditable element
• CVE-2020-15678: When recursing through layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free scenario
• CVE-2020-15673: Fixed memory safety bugs
• Enhance fix for wayland-detection (bsc#1174420)
• Attempt to fix langpack-parallelization by introducing separate obj-dirs for each lang (bsc#1173986, bsc#1167976)

This update for MozillaThunderbird and mozilla-nspr fixes the following issues:

• Mozilla Thunderbird 78.4

  • new: MailExtensions: browser.tabs.sendMessage API added
  • new: MailExtensions: messageDisplayScripts API added
  • changed: Yahoo and AOL mail users using password authentication will be migrated to OAuth2
  • changed: MailExtensions: messageDisplay APIs extended to support multiple selected messages
  • changed: MailExtensions: compose.begin functions now support creating a message with attachments
  • fixed: Thunderbird could freeze when updating global search index
  • fixed: Multiple issues with handling of self-signed SSL certificates addressed
  • fixed: Recipient address fields in compose window could expand to fill all available space
  • fixed: Inserting emoji characters in message compose window caused unexpected behavior
  • fixed: Button to restore default folder icon color was not keyboard accessible
  • fixed: Various keyboard navigation fixes
  • fixed: Various color-related theme fixes
  • fixed: MailExtensions: Updating attachments with onBeforeSend.addListener() did not work MFSA 2020-47 (bsc#1177977)
  • CVE-2020-15969 Use-after-free in usersctp
  • CVE-2020-15683 Memory safety bugs fixed in Thunderbird 78.4

• Mozilla Thunderbird 78.3.3

  • OpenPGP: Improved support for encrypting with subkeys
  • OpenPGP message status icons were not visible in message header pane
  • Creating a new calendar event did not require an event title

• Mozilla Thunderbird 78.3.2 (bsc#1176899)

  • OpenPGP: Improved support for encrypting with subkeys
  • OpenPGP: Encrypted messages with international characters were sometimes displayed incorrectly
  • Single-click deletion of recipient pills with middle mouse button restored
  • Searching an address book list did not display results
  • Dark mode, high contrast, and Windows theming fixes

• Mozilla Thunderbird 78.3.1

  • fix crash in nsImapProtocol::CreateNewLineFromSocket

• Mozilla Thunderbird 78.3.0 MFSA 2020-44 (bsc#1176756)

  • CVE-2020-15677 Download origin spoofing via redirect
  • CVE-2020-15676 XSS when pasting attacker-controlled data into a contenteditable element
  • CVE-2020-15678 When recursing through layers while scrolling, an iterator may have become invalid, resulting in a potential use-after- free scenario
  • CVE-2020-15673 Memory safety bugs fixed in Thunderbird 78.3

• update mozilla-nspr to version 4.25.1

  • The macOS platform code for shared library loading was changed to support macOS 11.
  • Dependency needed for the MozillaThunderbird udpate

Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, conduct cross-site scripting (XSS) attacks, spoof the site displayed in the download dialog, or execute arbitrary code.