Security
Security
ClamAV contains two vulnerabilities that could lead to Denial of Service and evasion of virus scanning.
| Package | app-antivirus/clamav on all architectures |
|---|---|
| Affected versions | <= 0.80 |
| Unaffected versions | >= 0.81 |
ClamAV is an antivirus toolkit. It includes a multi-threaded daemon and a command line scanner.
ClamAV fails to properly scan ZIP files with special headers (CAN-2005-0133) and base64 encoded images in URLs.
By sending a base64 encoded image file in a URL an attacker could evade virus scanning. By sending a specially-crafted ZIP file an attacker could cause a Denial of Service by crashing the clamd daemon.
There is no known workaround at this time.
All ClamAV users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=app-antivirus/clamav-0.81"