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 on an affected device. The vulnerability is due to improper input validation checking mechanisms of .tar (Tape Archive) files sent to an affected device. A successful exploit could cause a checksum buffer over-read condition when ClamAV scans the malicious .tar file, potentially allowing the attacker to cause a DoS condition on the affected device.
https://usn.ubuntu.com/3550-2/
https://usn.ubuntu.com/3550-1/
https://lists.debian.org/debian-lts-announce/2018/01/msg00035.html
http://blog.clamav.net/2018/01/clamav-0993-has-been-released.html