Kjetil Kjernsmo discovered a bug in libimager-perl, a Perl extension for generating 24 bit images, which can lead to a segmentation fault if it operates on 4-channel JPEG images.
The old stable distribution (woody) does not contain this package.
For the stable distribution (sarge) this problem has been fixed in version 0.44-1sarge1.
For the unstable distribution (sid) this problem has been fixed in version 0.50-1.
We recommend that you upgrade your libimager-perl package.
MD5 checksums of the listed files are available in the original advisory.