Bernhard Mueller of SEC Consult has discovered a format string vulnerability in perdition, an IMAP proxy. This vulnerabilty could allow an unauthenticated remote user to run arbitrary code on the perdition server by providing a specially formatted IMAP tag.
For the old stable distribution (sarge), this problem has been fixed in version 1.15-5sarge1.
For the stable distribution (etch), this problem has been fixed in version 1.17-7etch1.
We recommend that you upgrade your perdition package.
MD5 checksums of the listed files are available in the original advisory.