fuseiso - security update

The following two issues have recently been fixed in Debian LTS (squeeze)
for the fuseiso package.

Issue 1

An integer overflow, leading to a heap-based buffer overflow flaw was
found in the way FuseISO, a FUSE module to mount ISO filesystem
images, performed reading of certain ZF blocks of particular inodes.
A remote attacker could provide a specially-crafted ISO file that,
when mounted via the fuseiso tool would lead to fuseiso binary crash.

This issue was discovered by Florian Weimer of Red Hat Product
Security Team.

The issue got resolve by bailing out before ZF blocks that exceed the
supported block size of 2^17 are to be read.

Issue 2

A stack-based buffer overflow flaw was found in the way FuseISO, a
FUSE module to mount ISO filesystem images, performed expanding of
directory portions for absolute path filename entries. A remote
attacker could provide a specially-crafted ISO file that, when
mounted via fuseiso tool would lead to fuseiso binary crash or,
potentially, arbitrary code execution with the privileges of the user
running the fuseiso executable.

This issue was discovered by Florian Weimer of Red Hat Product
Security Team.

The issue got resolved by checking the resulting length of an
absolute path name and by bailing out if the platform’s PATH_MAX
value gets exceeded.