It was discovered that pdns-recursor, the PowerDNS recursive name server, contains several vulnerabilities: A buffer overflow can be exploited to crash the daemon, or potentially execute arbitrary code . A cache poisoning vulnerability may allow attackers to trick the server into serving incorrect DNS data . For the old stable distribution , fixed packages will be provided soon. For the stable distribution , these problems have been fixed in version 3.1.7-1+lenny1. For the unstable distribution , these problems have been fixed in version 3.1.7.2-1. We recommend that you upgrade your pdns-recursor package.