Max Vozeler discovered several format string vulnerabilities in the movemail utility of Emacs, the well-known editor. Via connecting to a malicious POP server an attacker can execute arbitrary code under the privileges of group mail.
For the stable distribution (woody) these problems have been fixed in version 21.2-1woody3.
For the unstable distribution (sid) these problems have been fixed in version 21.3+1-9.
We recommend that you upgrade your emacs packages.