spamdyke: Arbitrary code execution

Background

spamdyke is a drop-in connection-time spam filter for qmail.

Description

Boundary errors related to the “snprintf()” and “vsnprintf()” functions in spamdyke could cause a buffer overflow.

Impact

A remote attacker could possibly execute arbitrary code or cause a Denial of Service.

Workaround

There is no known workaround at this time.

Resolution

All spamdyke users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=mail-filter/spamdyke-4.3.0"