It was found that ClamAV, an antivirus software, was susceptible to a denial of service attack by unauthenticated users via inefficient MIME parsing of especially crafted email files.

For Debian 8 Jessie, this problem has been fixed in version 0.101.5+dfsg-0+deb8u1.

We recommend that you upgrade your clamav packages.

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS