CVE-2021-29949 Other in Thunderbird
Thunderbird loads a malicious library if a specific filename exists in the search path, allowing code execution on compromised systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-29949?
CVE-2021-29949 is a high-severity vulnerability in Mozilla Thunderbird, published on 24 Jun 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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: CWE-427
Which versions are affected by CVE-2021-29949?
It affects 1 product.
Products include Mozilla Thunderbird.
How do I fix CVE-2021-29949?
Upgrade to a fixed version.
Is CVE-2021-29949 being exploited?
There is no known exploitation of CVE-2021-29949 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Thunderbird
Sources
Also known as DEBIAN-CVE-2021-29949, GHSA-mhf4-98x7-2cw4, UBUNTU-CVE-2021-29949.