A vulnerability was discovered in the way that Razor parses certain email headers that could potentially be used to crash the Razor program, causing a denial of service.
For the stable distribution (sarge), this problem has been fixed in version 2.670-1sarge2.
The old stable distribution (woody) is not affected by this issue.
We recommend that you upgrade your razor package.
MD5 checksums of the listed files are available in the original advisory.