CVE-2021-23969 Affecting thunderbird-debuginfo package, versions <0:78.8.0-1.amzn2


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.67% (81st percentile)

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  • Snyk IDSNYK-AMZN2-THUNDERBIRDDEBUGINFO-1698055
  • published27 Sept 2021
  • disclosed26 Feb 2021

Introduced: 26 Feb 2021

CVE-2021-23969  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 thunderbird-debuginfo to version 0:78.8.0-1.amzn2 or higher.
This issue was patched in ALAS2-2021-1618.

NVD Description

Note: Versions mentioned in the description apply only to the upstream thunderbird-debuginfo package and not the thunderbird-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 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.

CVSS Scores

version 3.1