Out-of-bounds Write Affecting firefox-esr package, versions <115.6.0esr-1~deb11u1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.67% (81st percentile)

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  • Snyk IDSNYK-DEBIAN11-FIREFOXESR-6131861
  • published20 Dec 2023
  • disclosed19 Dec 2023

Introduced: 19 Dec 2023

CVE-2023-6856  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Debian:11 firefox-esr to version 115.6.0esr-1~deb11u1 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.

The WebGL DrawElementsInstanced method was susceptible to a heap buffer overflow when used on systems with the Mesa VM driver. This issue could allow an attacker to perform remote code execution and sandbox escape. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.

CVSS Scores

version 3.1