CVE-2015-2925 Information

Description

The prepend_path function in fs/dcache.c in the Linux kernel before 4.2.4 does not properly handle rename actions inside a bind mount which allows local users to bypass an intended container protection mechanism by renaming a directory related to a \double-chroot attack.\

Reference

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=397d425dc26da728396e66d392d5dcb8dac30c37 http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cde93be45a8a90d8c264c776fab63487b5038a65 http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00005.html http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00018.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00007.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00009.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00017.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00018.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00019.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00020.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00021.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00022.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00034.html http://permalink.gmane.org/gmane.linux.kernel.containers/29173 http://permalink.gmane.org/gmane.linux.kernel.containers/29177 http://pkgs.fedoraproject.org/cgit/kernel.git/commit/?h=f22&id=520b64102de2f184036024b2a53de2b67463bd78 http://rhn.redhat.com/errata/RHSA-2015-2636.html http://rhn.redhat.com/errata/RHSA-2016-0068.html http://www.debian.org/security/2015/dsa-3364 http://www.debian.org/security/2015/dsa-3372 http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.2.4 http://www.openwall.com/lists/oss-security/2015/04/04/4 http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html http://www.securityfocus.com/bid/73926 http://www.ubuntu.com/usn/USN-2792-1 http://www.ubuntu.com/usn/USN-2794-1 http://www.ubuntu.com/usn/USN-2795-1 http://www.ubuntu.com/usn/USN-2798-1 http://www.ubuntu.com/usn/USN-2799-1 https://bugzilla.redhat.com/show_bug.cgi?id=1209367 https://bugzilla.redhat.com/show_bug.cgi?id=1209373 https://github.com/torvalds/linux/commit/397d425dc26da728396e66d392d5dcb8dac30c37 https://github.com/torvalds/linux/commit/cde93be45a8a90d8c264c776fab63487b5038a65