Arbitrary Code Injection Affecting firefox-esr package, versions <78.9.0esr-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.24% (65th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-FIREFOXESR-1314374
  • published25 Jun 2021
  • disclosed24 Jun 2021

Introduced: 24 Jun 2021

CVE-2021-29955  (opens in a new tab)
CWE-74  (opens in a new tab)

How to fix?

Upgrade Debian:unstable firefox-esr to version 78.9.0esr-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.

A transient execution vulnerability, named Floating Point Value Injection (FPVI) allowed an attacker to leak arbitrary memory addresses and may have also enabled JIT type confusion attacks. (A related vulnerability, Speculative Code Store Bypass (SCSB), did not affect Firefox.). This vulnerability affects Firefox ESR < 78.9 and Firefox < 87.

CVSS Scores

version 3.1