This was originally reported by Jann Horn (jannhorn): mount discloses information about folders not accessible for a user: $ ls -ld /root/.ssh ls: cannot access /root/.ssh: Permission denied $ ls -ld /root/.foo ls: cannot access /root/.foo: Permission denied First variant: $ mount --guess-fstype /root/.ssh/../../dev/sda1 ext4 $ mount --guess-fstype /root/.foo/../../dev/sda1 unknown Second one: $ mount /root/.ssh/../../dev/cdrom mount: no medium found on /dev/sr0 $ mount /root/.foo/../../dev/cdrom mount: can't find /root/.foo/../../dev/cdrom in /etc/fstab or /etc/mtab These issues were, as far as I can see, fixed in the following upstream commits: - 0377ef91270d06592a0d4dd009c29e7b1ff9c9b8 - 33c5fd0c5a774458470c86f9d318d8c48a9c9ccb - 5ebbc3865d1e53ef42e5f121c41faab23dd59075 - cc8cc8f32c863f3ae6a8a88e97b47bcd6a21825f External references: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=697464
Created util-linux tracking bugs for this issue Affects: fedora-16 [bug 892391]
The following upstream commits address this issue: (For both util-linux as well as util-linux-ng) 1. Adds canonicalize_path_restricted() to canonicalize without suid permisssions http://git.kernel.org/?p=utils/util-linux/util-linux.git;a=commit;h=33c5fd0c5a774458470c86f9d318d8c48a9c9ccb 2. sanitize path for non-root users (mount): http://git.kernel.org/?p=utils/util-linux/util-linux.git;a=commit;h=5ebbc3865d1e53ef42e5f121c41faab23dd59075 3. sanitize path for non-root users (umount): http://git.kernel.org/?p=utils/util-linux/util-linux.git;a=commit;h=cc8cc8f32c863f3ae6a8a88e97b47bcd6a21825f 4. drop the --guess-fstype option: http://git.kernel.org/?p=utils/util-linux/util-linux.git;a=commit;h=0377ef91270d06592a0d4dd009c29e7b1ff9c9b8
This issue affects the version of util-linux as shipped with Fedora 16 and Fedora-17
Created util-linux tracking bugs for this issue Affects: fedora-17 [bug 892456]
This issue has been addressed in following products: Red Hat Enterprise Linux 6 Via RHSA-2013:0517 https://rhn.redhat.com/errata/RHSA-2013-0517.html
Statement: Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and maintenance life cycle. This has been rated as having Low security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.