Use After Free Affecting firefox-esr package, versions <91.3.0esr-1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.43% (75th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-FIREFOXESR-1909761
  • published3 Nov 2021
  • disclosed8 Dec 2021

Introduced: 3 Nov 2021

CVE-2021-38504  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Debian:unstable firefox-esr to version 91.3.0esr-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.

When interacting with an HTML input element's file picker dialog with webkitdirectory set, a use-after-free could have resulted, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.

CVSS Scores

version 3.1