MGASA-2015-0406

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.

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.