Cross-site Scripting (XSS) Affecting thunderbird-debuginfo package, versions <0:78.6.0-1.amzn2


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.08% (38th percentile)

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  • Snyk IDSNYK-AMZN2-THUNDERBIRDDEBUGINFO-1692955
  • published27 Sept 2021
  • disclosed9 Dec 2020

Introduced: 9 Dec 2020

CVE-2020-26951  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 thunderbird-debuginfo to version 0:78.6.0-1.amzn2 or higher.
This issue was patched in ALAS2-2021-1586.

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.

A parsing and event loading mismatch in Firefox's SVG code could have allowed load events to fire, even after sanitization. An attacker already capable of exploiting an XSS vulnerability in privileged internal pages could have used this attack to bypass our built-in sanitizer. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

CVSS Scores

version 3.1