Lincoln Stein discovered that the Perl Crypt::CBC module produces weak ciphertext when used with block encryption algorithms with blocksize > 8 bytes.
The old stable distribution (woody) does not contain a Crypt::CBC module.
For the stable distribution (sarge) this problem has been fixed in version 2.12-1sarge1.
For the unstable distribution (sid) this problem has been fixed in version 2.17-1.
We recommend that you upgrade your libcrypt-cbc-perl package.
MD5 checksums of the listed files are available in the original advisory.