The 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 a lack of input validation checking mechanisms
during certain mail parsing functions (the rfc2047 function in mbox.c). An
unauthenticated, remote attacker could exploit this vulnerability by
sending a crafted email to the affected device. This action could cause a
buffer overflow condition when ClamAV scans the malicious email, allowing
the attacker to potentially cause a DoS condition on an affected device.