Core Security Technologies discovered a buffer overflow in the IMAP code of Mutt, a text-oriented mail reader supporting IMAP, MIME, GPG, PGP and threading. This problem allows a remote malicious IMAP server to cause a denial of service (crash) and possibly execute arbitrary code via a specially crafted mail folder.
For the stable distribution (woody) this problem has been fixed in version 1.3.28-2.1.
The old stable distribution (potato) is not affected by this problem.
For the unstable distribution (sid) this problem has been fixed in version 1.5.4-1.
We recommend that you upgrade your mutt package.