duskwave discovered that tinymux, a text-based multi-user virtual world server, performs insufficient boundary checks when working with user-supplied data, which might lead to the execution of arbitrary code.
For the stable distribution (etch), this problem has been fixed in version 2.4.3.31-1etch1.
We recommend that you upgrade your tinymux package.
MD5 checksums of the listed files are available in the original advisory.