Updated fuse packages that fix multiple security issues are now available for Red Hat Enterprise Linux 6.
The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links associated with each description below.
FUSE (Filesystem in Userspace) can implement a fully functional file system in a user-space program. These packages provide the mount utility, fusermount, the tool used to mount FUSE file systems.
Security Fixes
- CVE-2010-3879, CVE-2011-0541, CVE-2011-0542, CVE-2011-0543
Multiple flaws were found in the way fusermount handled the mounting and unmounting of directories when symbolic links were present. A local user in the fuse group could use these flaws to unmount file systems, which they would otherwise not be able to unmount and that were not mounted using FUSE, via a symbolic link attack.
The util-linux-ng RHBA-2011:0699 update must also be installed to fully correct the above flaws.
All users should upgrade to these updated packages, which contain backported patches to correct these issues.
An updated fuse package that fixes one bug is now available in Red Hat Enterprise Linux 6.
The fuse package contains the file system in userspace utilities and libraries required for using fuse file systems.
Bug Fix
- BZ#723757
Prior to this update, fusermount used an incorrect path to unmount. As a result, fusermount was unable to unmount mounted fuse file systems. This update, modifies fusermount to use the correct mount path. Now, mounted fuse file systems can be successfully unmounted with fusermount.
All users who use fuse file systems in their environment are advised to upgrade to this updated fuse package, which fixes this bug.
