CVE-2015-8660

high-risk
Published 2015-12-28

The ovl_setattr function in fs/overlayfs/inode.c in the Linux kernel through 4.3.3 attempts to merge distinct setattr operations, which allows local users to bypass intended access restrictions and modify the attributes of arbitrary overlay files via a crafted application.

Do I need to act?

!
60.0% chance of exploitation in next 30 days
EPSS score — higher than 40% of all CVEs
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
!
3 public exploits available
40688, 39166, 39230
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.7/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Linux

References (46)

Vendor Advisory http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=acff81...
Mailing List http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00039.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00040.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00043.html
Third Party Advisory http://packetstormsecurity.com/files/135151/Ubuntu-14.04-LTS-15.10-overlayfs-Loc...
Third Party Advisory http://rhn.redhat.com/errata/RHSA-2016-1532.html
Third Party Advisory http://rhn.redhat.com/errata/RHSA-2016-1539.html
Third Party Advisory http://rhn.redhat.com/errata/RHSA-2016-1541.html
Mailing List http://www.openwall.com/lists/oss-security/2015/12/23/5
Third Party Advisory http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.h...
Third Party Advisory http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htm...
Third Party Advisory http://www.securityfocus.com/bid/79671
Third Party Advisory http://www.securitytracker.com/id/1034548
Third Party Advisory http://www.ubuntu.com/usn/USN-2857-1
Third Party Advisory http://www.ubuntu.com/usn/USN-2857-2
Third Party Advisory http://www.ubuntu.com/usn/USN-2858-1
Third Party Advisory http://www.ubuntu.com/usn/USN-2858-2
Third Party Advisory http://www.ubuntu.com/usn/USN-2858-3
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1291329
Vendor Advisory https://github.com/torvalds/linux/commit/acff81ec2c79492b180fade3c2894425cd35a54...
and 26 more references
51
/ 100
high-risk
Severity 21/34 · High
Exploitability 25/34 · High
Exposure 5/34 · Minimal