CVE-2021-23969 Affecting thunderbird package, versions <1:78.8.0-1


0.0
medium

Snyk CVSS

    Attack Complexity Low
    User Interaction Required

    Threat Intelligence

    EPSS 0.54% (77th percentile)
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NVD
4.3 medium
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Red Hat
4.3 medium
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SUSE
4.3 medium

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  • Snyk ID SNYK-DEBIAN11-THUNDERBIRD-1078769
  • published 24 Feb 2021
  • disclosed 26 Feb 2021

How to fix?

Upgrade Debian:11 thunderbird to version 1:78.8.0-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream thunderbird package and not the thunderbird package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

As specified in the W3C Content Security Policy draft, when creating a violation report, "User agents need to ensure that the source file is the URL requested by the page, pre-redirects. If that’s not possible, user agents need to strip the URL down to an origin to avoid unintentional leakage." Under certain types of redirects, Firefox incorrectly set the source file to be the destination of the redirects. This was fixed to be the redirect destination's origin. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.