Out-of-bounds Write Affecting firefox-esr package, versions <78.12.0esr-1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.43% (76th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-FIREFOXESR-1317018
  • published14 Jul 2021
  • disclosed5 Aug 2021

Introduced: 14 Jul 2021

CVE-2021-29976  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Debian:unstable firefox-esr to version 78.12.0esr-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:unstable relevant fixed versions and status.

Mozilla developers reported memory safety bugs present in code shared between Firefox and Thunderbird. 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 Thunderbird < 78.12, Firefox ESR < 78.12, and Firefox < 90.

CVSS Scores

version 3.1