Improper Check for Unusual or Exceptional Conditions The advisory has been revoked - it doesn't affect any version of package thunderbird  (opens in a new tab)


Threat Intelligence

EPSS
0.46% (63rd percentile)

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  • Snyk IDSNYK-UBUNTU2004-THUNDERBIRD-596012
  • published29 Jul 2020
  • disclosed10 Aug 2020

Introduced: 29 Jul 2020

CVE-2020-15658  (opens in a new tab)
CWE-754  (opens in a new tab)

Amendment

The Ubuntu security team deemed this advisory irrelevant for Ubuntu:20.04.

NVD Description

Note: Versions mentioned in the description apply only to the upstream thunderbird package and not the thunderbird package as distributed by Ubuntu.

The code for downloading files did not properly take care of special characters, which led to an attacker being able to cut off the file ending at an earlier position, leading to a different file type being downloaded than shown in the dialog. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.