Use After Free Affecting firefox-esr package, versions <78.5.0esr-1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.28% (70th percentile)

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  • Snyk IDSNYK-DEBIAN11-FIREFOXESR-1041108
  • published18 Nov 2020
  • disclosed9 Dec 2020

Introduced: 18 Nov 2020

CVE-2020-26960  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Debian:11 firefox-esr to version 78.5.0esr-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox-esr package and not the firefox-esr package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

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.

CVSS Scores

version 3.1