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Time-of-check Time-of-use (TOCTOU) Affecting firefox-esr package, versions <91.7.0esr-1~deb10u1

0.0
high

Snyk CVSS

    Attack Complexity High
    User Interaction Required
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.12% (47th percentile)
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NVD
7.5 high
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SUSE
7.5 high
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Red Hat
7.5 high

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  • Snyk ID SNYK-DEBIAN10-FIREFOXESR-2420052
  • published 9 Mar 2022
  • disclosed 22 Dec 2022
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Introduced: 9 Mar 2022

CVE-2022-26387 Open this link in a new tab
CWE-367 Open this link in a new tab

How to fix?

Upgrade Debian:10 firefox-esr to version 91.7.0esr-1~deb10u1 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:10 relevant fixed versions and status.

When installing an add-on, Firefox verified the signature before prompting the user; but while the user was confirming the prompt, the underlying add-on file could have been modified and Firefox would not have noticed. This vulnerability affects Firefox < 98, Firefox ESR < 91.7, and Thunderbird < 91.7.