CVE-2015-2925
medium
CVSS v3
—
CVSS v2
6.9
VIR risk
6.9
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."
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2015-2925
Vendor advisory: cve@mitre.org — http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.2.4
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 4.2.1-1 |
| debian | bullseye | fixed | 4.2.1-1 |
| debian | forky | fixed | 4.2.1-1 |
| debian | sid | fixed | 4.2.1-1 |
| debian | trixie | fixed | 4.2.1-1 |
| debian | 7.0 | affected | |
| debian | 8.0 | affected | |
| ubuntu | 12.04 | affected | |
| ubuntu | 14.04 | affected | |
| ubuntu | 15.04 | affected | |
| linux-kernel | affected | 3.2.72 |
References
- 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
Verify integrity in audit chain (admin only). AS-IS.