CVE-2021-29948 Race condition in Thunderbird
A local attacker can exploit a race condition during signature verification to replace files, potentially leading to code execution or bypassing security checks.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-29948?
CVE-2021-29948 is a low-severity vulnerability in Mozilla Thunderbird, published on 24 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Signatures are written to disk before and read during verification, which might be subject to a race condition when a malicious local process or user is replacing the file. This vulnerability affects Thunderbird < 78.10.
Weakness: CWE-362
Which versions are affected by CVE-2021-29948?
It affects 1 product.
Products include Mozilla Thunderbird.
How do I fix CVE-2021-29948?
Upgrade to a fixed version.
Is CVE-2021-29948 being exploited?
There is no known exploitation of CVE-2021-29948 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Thunderbird
Sources
Also known as DEBIAN-CVE-2021-29948, GHSA-7h9q-985f-8xvm, UBUNTU-CVE-2021-29948.