CVE-2021-29949 Information

Description

When loading the shared library that provides the OTR protocol implementation Thunderbird will initially attempt to open it using a filename that isn’t distributed by Thunderbird. If a computer has already been infected with a malicious library of the alternative filename and the malicious library has been copied to a directory that is contained in the search path for executable libraries then Thunderbird will load the incorrect library. This vulnerability affects Thunderbird < 78.9.1.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Reference

https://www.mozilla.org/security/advisories/mfsa2021-13/ https://bugzilla.mozilla.org/show_bug.cgi?id=1682101

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8