A vulnerability in the email parsing module in Clam AntiVirus (ClamAV) Software version 0.103.1 and all prior versions could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to improper variable initialization that may result in an NULL pointer read. An attacker could exploit this vulnerability by sending a crafted email to an affected device. An exploit could allow the attacker to cause the ClamAV scanning process crash, resulting in a denial of service condition.
The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.
The product does not initialize a critical resource.
| Link | Tags |
|---|---|
| https://blog.clamav.net/2021/04/clamav-01032-security-patch-release.html | release notes vendor advisory |
| https://lists.debian.org/debian-lts-announce/2021/04/msg00012.html | third party advisory mailing list |
| https://security.gentoo.org/glsa/202104-07 | third party advisory vendor advisory |