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CVE-2021-4129

CVE-2021-4129

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Mozilla developers and community members Julian Hector, Randell Jesup, Gabriele Svelto, Tyson Smith, Christian Holler, and Masayuki Nakano reported memory safety bugs present in Firefox 94. 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 Firefox < 95, Firefox ESR < 91.4.0, and Thunderbird < 91.4.0.

CVSS 9.8 · Critical · EPSS 1.1% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • firefox

    Versions
    • ≥ unspecified, < 95: Affected (custom)

    Update to 95

  • firefox esr

    Versions
    • ≥ unspecified, < 91.4.0: Affected (custom)

    Update to 91.4.0

  • thunderbird

    Versions
    • ≥ unspecified, < 91.4.0: Affected (custom)

    Update to 91.4.0

  • firefox-esr Debian:12

    Affected ranges
    • ECOSYSTEM: < 91.4.0esr-1

    Update to 91.4.0esr-1

  • firefox-esr Debian:13

    Affected ranges
    • ECOSYSTEM: < 91.4.0esr-1

    Update to 91.4.0esr-1

  • firefox-esr Debian:14

    Affected ranges
    • ECOSYSTEM: < 91.4.0esr-1

    Update to 91.4.0esr-1

  • thunderbird Debian:12

    Affected ranges
    • ECOSYSTEM: < 1:91.4.0-1

    Update to 1:91.4.0-1

  • thunderbird Debian:13

    Affected ranges
    • ECOSYSTEM: < 1:91.4.0-1

    Update to 1:91.4.0-1

  • thunderbird Debian:14

    Affected ranges
    • ECOSYSTEM: < 1:91.4.0-1

    Update to 1:91.4.0-1

  • thunderbird Ubuntu:18.04:LTS

    Versions
    • 1:52.4.0+build1-0ubuntu2
    • 1:52.6.0+build1-0ubuntu1
    • 1:52.7.0+build1-0ubuntu1
    • 1:52.8.0+build1-0ubuntu0.18.04.1
    • 1:52.9.1+build3-0ubuntu0.18.04.1
    • 1:60.2.1+build1-0ubuntu0.18.04.2
    • 1:60.4.0+build2-0ubuntu0.18.04.1
    • 1:60.5.1+build2-0ubuntu0.18.04.1
    • 1:60.6.1+build2-0ubuntu0.18.04.1
    • 1:60.7.0+build1-0ubuntu0.18.04.1
    • 1:60.7.1+build1-0ubuntu0.18.04.1
    • 1:60.7.2+build2-0ubuntu0.18.04.1
    • 1:60.8.0+build1-0ubuntu0.18.04.1
    • 1:60.9.0+build1-0ubuntu0.18.04.1
    • 1:68.2.1+build1-0ubuntu0.18.04.1
    • 1:68.2.2+build1-0ubuntu0.18.04.1
    • 1:68.4.1+build1-0ubuntu0.18.04.1
    • 1:68.7.0+build1-0ubuntu0.18.04.1
    • 1:68.8.0+build2-0ubuntu0.18.04.2
    • 1:68.10.0+build1-0ubuntu0.18.04.1
    • 1:78.8.1+build1-0ubuntu0.18.04.1
    • 1:78.11.0+build1-0ubuntu0.18.04.2
    • 1:78.13.0+build1-0ubuntu0.18.04.1
    • 1:78.14.0+build1-0ubuntu0.18.04.1
    • 1:78.14.0+build1-0ubuntu0.18.04.2
    Affected ranges
    • ECOSYSTEM: < 1:91.5.0+build1-0ubuntu0.18.04.1

    Update to 1:91.5.0+build1-0ubuntu0.18.04.1

  • thunderbird Ubuntu:20.04:LTS

    Versions
    • 1:68.1.2+build1-0ubuntu1
    • 1:68.1.2+build1-0ubuntu2
    • 1:68.2.1+build1-0ubuntu1
    • 1:68.2.2+build1-0ubuntu1
    • 1:68.3.0+build2-0ubuntu1
    • 1:68.3.1+build1-0ubuntu2
    • 1:68.4.1+build1-0ubuntu1
    • 1:68.4.2+build2-0ubuntu1
    • 1:68.5.0+build1-0ubuntu1
    • 1:68.6.0+build2-0ubuntu1
    • 1:68.7.0+build1-0ubuntu1
    • 1:68.7.0+build1-0ubuntu2
    • 1:68.8.0+build2-0ubuntu0.20.04.2
    • 1:68.10.0+build1-0ubuntu0.20.04.1
    • 1:78.7.1+build1-0ubuntu0.20.04.1
    • 1:78.8.1+build1-0ubuntu0.20.04.1
    • 1:78.11.0+build1-0ubuntu0.20.04.2
    • 1:78.13.0+build1-0ubuntu0.20.04.2
    • 1:78.14.0+build1-0ubuntu0.20.04.1
    • 1:78.14.0+build1-0ubuntu0.20.04.2
    Affected ranges
    • ECOSYSTEM: < 1:91.5.0+build1-0ubuntu0.20.04.1

    Update to 1:91.5.0+build1-0ubuntu0.20.04.1

Original sources

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