ClamAV AntiVirus software versions 0.99.2 and prior contain a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition or potentially execute arbitrary code on an affected device. The vulnerability is due to improper input validation checking mechanisms when handling Portable Document Format (.pdf) files sent to an affected device. An unauthenticated, remote attacker could exploit this vulnerability by sending a crafted .pdf file to an affected device. This action could cause a handle_pdfname (in pdf.c) buffer overflow when ClamAV scans the malicious file, allowing the attacker to cause a DoS condition or potentially execute arbitrary code.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
| Link | Tags |
|---|---|
| https://usn.ubuntu.com/3550-1/ | vendor advisory |
| https://usn.ubuntu.com/3550-2/ | vendor advisory |
| https://bugzilla.clamav.net/show_bug.cgi?id=11942 | patch exploit vendor advisory issue tracking |
| https://lists.debian.org/debian-lts-announce/2018/01/msg00035.html | third party advisory mailing list |
| http://blog.clamav.net/2018/01/clamav-0993-has-been-released.html | release notes vendor advisory |