Tavis Ormandy discovered several vulnerabilities in the TIFF library that can lead to a denial of service or the execution of arbitrary code. The Common Vulnerabilities and Exposures project identifies the following problems:
Multiple vulnerabilities allow attackers to cause a denial of service.
An integer overflow allows attackers to cause a denial of service and possibly execute arbitrary code.
A double-free vulnerability allows attackers to cause a denial of service and possibly execute arbitrary code.
For the old stable distribution (woody) these problems have been fixed in version 3.5.5-7woody1.
For the stable distribution (sarge) these problems have been fixed in version 3.7.2-3sarge1.
The unstable distribution (sid) is not vulnerable to these problems.
We recommend that you upgrade your libtiff packages.
MD5 checksums of the listed files are available in the original advisory.