It was discovered that znc, an IRC proxy, did not properly process certain DCC requests, allowing attackers to upload arbitrary files. For the old stable distribution , this problem has been fixed in version 0.045-3+etch3. For the stable distribution , this problem has been fixed in version 0.058-2+lenny3. For the unstable distribution , this problem has been fixed in version 0.074-1. We recommend that you upgrade your znc package.