The version of Firefox ESR installed on the remote macOS or Mac OS X host is prior to 78.5. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-51 advisory.

  - Mozilla developers Steve Fink, Jason Kratzer, Randell Jesup, Christian Holler, and Byron Campen reported     memory safety bugs present in Firefox 82 and Firefox ESR 78.4. 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. (CVE-2020-26968)

  - In Freetype, if PNG images were embedded into fonts, the <code>LoadSBitPng</code> function contained an     integer overflow that led to a heap buffer overflow, memory corruption, and an exploitable crash. Note:
    While Project Zero did discover instances of this vulnerability being exploited in the wild against     Chrome, in Firefox this vulnerability is only triggerable if a rarely-used, hidden preference is toggled,     and only affected Linux and Android operating systems. Other operating systems are unaffected; and Linux     and Android are unaffected in the default configuration. (CVE-2020-15999)

  - A parsing and event loading mismatch in Firefox's SVG code could have allowed load events to fire, even     after sanitization. An attacker already capable of exploiting an XSS vulnerability in privileged internal     pages could have used this attack to bypass our built-in sanitizer. (CVE-2020-26951)

  - When drawing a transparent image on top of an unknown cross-origin image, the Skia library     <code>drawImage</code> function took a variable amount of time depending on the content of the underlying     image. This resulted in potential cross-origin information exposure of image content through timing side-     channel attacks. (CVE-2020-16012)

  - It was possible to cause the browser to enter fullscreen mode without displaying the security UI; thus     making it possible to attempt a phishing attack or otherwise confuse the user. (CVE-2020-26953)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

This update for MozillaThunderbird fixes the following issues :

TODO

  - Mozilla Thunderbird 78.5.0

  - new: OpenPGP: Added option to disable attaching the     public key to a signed message (bmo#1654950)

  - new: MailExtensions: 'compose_attachments' context added     to Menus API (bmo#1670822)

  - new: MailExtensions: Menus API now available on     displayed messages (bmo#1670825)

  - changed: MailExtensions: browser.tabs.create will now     wait for 'mail-delayed-startup-finished' event     (bmo#1674407)

  - fixed: OpenPGP: Support for inline PGP messages improved     (bmo#1672851)

  - fixed: OpenPGP: Message security dialog showed     unverified keys as unavailable (bmo#1675285)

  - fixed: Chat: New chat contact menu item did not function     (bmo#1663321)

  - fixed: Various theme and usability improvements     (bmo#1673861)

  - fixed: Various security fixes MFSA 2020-52 (bsc#1178894)

  - CVE-2020-26951 (bmo#1667113) Parsing mismatches could     confuse and bypass security sanitizer for chrome     privileged code

  - CVE-2020-16012 (bmo#1642028) Variable time processing of     cross-origin images during drawImage calls

  - CVE-2020-26953 (bmo#1656741) Fullscreen could be enabled     without displaying the security UI

  - CVE-2020-26956 (bmo#1666300) XSS through paste (manual     and clipboard API)

  - CVE-2020-26958 (bmo#1669355) Requests intercepted     through ServiceWorkers lacked MIME type restrictions

  - CVE-2020-26959 (bmo#1669466) Use-after-free in     WebRequestService

  - CVE-2020-26960 (bmo#1670358) Potential use-after-free in     uses of nsTArray

  - CVE-2020-15999 (bmo#1672223) Heap buffer overflow in     freetype

  - CVE-2020-26961 (bmo#1672528) DoH did not filter IPv4     mapped IP Addresses

  - CVE-2020-26965 (bmo#1661617) Software keyboards may have     remembered typed passwords

  - CVE-2020-26966 (bmo#1663571) Single-word search queries     were also broadcast to local network

  - CVE-2020-26968 (bmo#1551615, bmo#1607762, bmo#1656697,     bmo#1657739, bmo#1660236, bmo#1667912, bmo#1671479,     bmo#1671923) Memory safety bugs fixed in Thunderbird     78.5

  - Mozilla Thunderbird 78.4.3 

  - fixed: User interface was inconsistent when switching     from the default theme to the dark theme and back to the     default theme (bmo#1659282)

  - fixed: Email subject would disappear when hovering over     it with the mouse when using Windows 7 Classic theme     (bmo#1675970)

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

This update for MozillaFirefox fixes the following issues :

Firefox Extended Support Release 78.5.0 ESR (bsc#1178824)

  - CVE-2020-26951: Parsing mismatches could confuse and     bypass security sanitizer for chrome privileged code

  - CVE-2020-16012: Variable time processing of cross-origin     images during drawImage calls

  - CVE-2020-26953: Fullscreen could be enabled without     displaying the security UI

  - CVE-2020-26956: XSS through paste (manual and clipboard     API)

  - CVE-2020-26958: Requests intercepted through     ServiceWorkers lacked MIME type restrictions

  - CVE-2020-26959: Use-after-free in WebRequestService

  - CVE-2020-26960: Potential use-after-free in uses of     nsTArray

  - CVE-2020-15999: Heap buffer overflow in freetype

  - CVE-2020-26961: DoH did not filter IPv4 mapped IP     Addresses

  - CVE-2020-26965: Software keyboards may have remembered     typed passwords

  - CVE-2020-26966: Single-word search queries were also     broadcast to local network

  - CVE-2020-26968: Memory safety bugs fixed in Firefox 83     and Firefox ESR 78.5

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote SUSE Linux SLES11 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2020:14548-1 advisory.

  - Heap buffer overflow in Freetype in Google Chrome prior to 86.0.4240.111 allowed a remote attacker to     potentially exploit heap corruption via a crafted HTML page. (CVE-2020-15999)

  - 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)

  - A parsing and event loading mismatch in Firefox's SVG code could have allowed load events to fire, even     after sanitization. An attacker already capable of exploiting an XSS vulnerability in privileged internal     pages could have used this attack to bypass our built-in sanitizer. This vulnerability affects Firefox <     83, Firefox ESR < 78.5, and Thunderbird < 78.5. (CVE-2020-26951)

  - It was possible to cause the browser to enter fullscreen mode without displaying the security UI; thus     making it possible to attempt a phishing attack or otherwise confuse the user. This vulnerability affects     Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5. (CVE-2020-26953)

  - In some cases, removing HTML elements during sanitization would keep existing SVG event handlers and     therefore lead to XSS. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird <     78.5. (CVE-2020-26956)

  - Firefox did not block execution of scripts with incorrect MIME types when the response was intercepted and     cached through a ServiceWorker. This could lead to a cross-site script inclusion vulnerability, or a     Content Security Policy bypass. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and     Thunderbird < 78.5. (CVE-2020-26958)

  - During browser shutdown, reference decrementing could have occured on a previously freed object, resulting     in a use-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects     Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5. (CVE-2020-26959)

  - If the Compact() method was called on an nsTArray, the array could have been reallocated without updating     other pointers, leading to a potential use-after-free and exploitable crash. This vulnerability affects     Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5. (CVE-2020-26960)

  - When DNS over HTTPS is in use, it intentionally filters RFC1918 and related IP ranges from the responses     as these do not make sense coming from a DoH resolver. However when an IPv4 address was mapped through     IPv6, these addresses were erroneously let through, leading to a potential DNS Rebinding attack. This     vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5. (CVE-2020-26961)

  - Some websites have a feature Show Password where clicking a button will change a password field into a     textbook field, revealing the typed password. If, when using a software keyboard that remembers user     input, a user typed their password and used that feature, the type of the password field was changed,     resulting in a keyboard layout change and the possibility for the software keyboard to remember the typed     password. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
    (CVE-2020-26965)

  - Searching for a single word from the address bar caused an mDNS request to be sent on the local network     searching for a hostname consisting of that string; resulting in an information leak. *Note: This issue     only affected Windows operating systems. Other operating systems are unaffected.*. This vulnerability     affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5. (CVE-2020-26966)

  - Mozilla developers reported memory safety bugs present in Firefox 82 and Firefox ESR 78.4. 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 < 83, Firefox ESR < 78.5, and     Thunderbird < 78.5. (CVE-2020-26968)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Published	Updated	Severity
142912	Mozilla Firefox ESR < 78.5	Nessus	MacOS X Local Security Checks	11/17/2020	11/18/2025	critical
143357	openSUSE Security Update : MozillaThunderbird (openSUSE-2020-2096)	Nessus	SuSE Local Security Checks	11/30/2020	2/6/2025	critical
143745	SUSE SLED15 / SLES15 Security Update : MozillaFirefox (SUSE-SU-2020:3383-1)	Nessus	SuSE Local Security Checks	12/9/2020	2/6/2025	critical
150523	SUSE SLES11 Security Update : MozillaFirefox (SUSE-SU-2020:14548-1)	Nessus	SuSE Local Security Checks	6/10/2021	2/6/2025	critical

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