CVEvulnerability
CVE-2021-29949
7.8 HIGH
Official page ↗
- Status
- Modified
- Published
- 2021-06-24
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 4.4 MEDIUM — AV:L/AC:M/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-427
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.
Affected configurations
• mozilla thunderbird (< 78.9.1)
Related
Weakness · CWE (1)
- CWE-427 Uncontrolled Search Path Element weakness
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1682101 Permissions Required, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-13/ Release Notes, Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1682101 Permissions Required, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-13/ Release Notes, Vendor Advisory