The version of Firefox installed on the remote Windows host is prior to 83.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-50 advisory.

  - Mozilla developers Tyson Smith, Aaron Klotz, David Major and Jason Kratzer reported memory safety bugs     present in Firefox 82. 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-2020-26969)

  - 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)

  - Incorrect bookkeeping of functions inlined during JIT compilation could have led to memory corruption and     a potentially exploitable crash when handling out-of-memory errors. (CVE-2020-26952)

  - 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)

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 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

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.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
142910	Mozilla Firefox < 83.0	Nessus	Windows	2020/11/17	2025/11/18	critical
143340	openSUSE Security Update : MozillaFirefox (openSUSE-2020-2031)	Nessus	SuSE Local Security Checks	2020/11/30	2025/2/6	critical
143741	SUSE SLES12 Security Update : MozillaFirefox (SUSE-SU-2020:3548-1)	Nessus	SuSE Local Security Checks	2020/12/9	2025/2/6	critical
145368	openSUSE Security Update : MozillaFirefox (openSUSE-2020-2315)	Nessus	SuSE Local Security Checks	2021/1/25	2025/2/6	critical

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