Use After Free Affecting thunderbird package, versions <1:78.5.0-1~deb10u1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.36% (73rd percentile)

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  • Snyk IDSNYK-DEBIAN10-THUNDERBIRD-1041158
  • published18 Nov 2020
  • disclosed9 Dec 2020

Introduced: 18 Nov 2020

CVE-2020-26959  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Debian:10 thunderbird to version 1:78.5.0-1~deb10u1 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:10 relevant fixed versions and status.

During browser shutdown, reference decrementing could have occured on a previously freed object, resulting in a use-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

CVSS Scores

version 3.1