CVE-2021-29949

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.

Weakness classification

• nvd@nist.gov: CWE-427

Primary references

• security@mozilla.org — Permissions Required, Vendor Advisory
• security@mozilla.org — Release Notes, Vendor Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Permissions Required, Vendor Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Vendor Advisory