+++ This bug was initially created as a clone of Bug #515250 +++ It is suspected that this package is vulnerable to a security vulnerability in LZO. As such we ask maintainers with packages suspected to be vulnerable to verify if the package is (or have been) affected. Please see the information contained in the tracker bug 515246. "An integer overflow may occur when processing any variant of a "literal run" in the lzo1x_decompress_safe function. Each of these three locations is subject to an integer overflow when processing zero bytes.", additional information about the upstream vulnerability is available at http://seclists.org/oss-sec/2014/q2/665
http://seclists.org/oss-sec/2014/q2/676 syslinux does contain the affected code, but I am not sure about the impact. If I understand correctly, the attacker needs to point the boot loader to a specially crafted LZO compressed archive.
From http://seclists.org/oss-sec/2014/q2/695: For the record, I just upgraded Syslinux to LZO 2.07. The only code that ends up in the Syslinux build at all changed only in comments and in #if'd out code. The only use of LZO is in the Syslinux core, which uses the assembly LZO implementation, which seems to have been unaffected. Syslinux does not use LZO on arbitrary data. -hpa