The remote host is missing updates announced in advisory CLA-2004:870.
imlib[1] and imlib2[2] are powerful image loading and rendering libraries.
Marcus Meissner noticed that due to improper bounds checking, imlib[3] and imlib2[4] are vulnerable to a buffer overflow when decoding runlength-encoded bitmaps. This bug can be exploited using a specially-crafted BMP image and could potentially allow remote code execution when this image is decoded by the user.
Solution: The apt tool can be used to perform RPM package upgrades by running 'apt-get update' followed by 'apt-get upgrade'