CVE-2022-37451 Use after free in n/a
An invalid free in Exim's PAM authentication allows attackers to cause a denial of service or potentially execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-37451?
CVE-2022-37451 is a high-severity use after free vulnerability in Exim Exim, published on 6 Aug 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Exim before 4.96 has an invalid free in pam_converse in auths/call_pam.c because store_free is not used after store_malloc.
Weakness: CWE-763
Which versions are affected by CVE-2022-37451?
It affects 2 products.
Products include Exim Exim, Fedoraproject Fedora.
How do I fix CVE-2022-37451?
Upgrade to a fixed version.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2022-37451 being exploited?
There is no known exploitation of CVE-2022-37451 in the wild and no public exploit code.
Other vulnerabilities in Exim Exim
Sources
Also known as CLSA-2022-1661445415, CLSA-2022-1661445629, DEBIAN-CVE-2022-37451, GHSA-968g-c3p8-6hvf.