Vulnerability CVE-2015-8660

Vulnerability CVE-2015-8660

Published: 2015-12-28 Modified: 2015-12-31

Description:

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.

See advisories in our WLB2 database:

	Topic	Author	Date
Med.	Overlayfs Privilege Escalation	rebel	02.11.2016

Type:

CWE-264

(Permissions, Privileges, and Access Controls)

CVSS2 => (AV:L/AC:L/Au:N/C:C/I:C/A:C)

CVSS Base Score	Impact Subscore	Exploitability Subscore
7.2/10	10/10	3.9/10

Exploit range	Attack complexity	Authentication
Local	Low	No required
Confidentiality impact	Integrity impact	Availability impact
Complete	Complete	Complete

Affected software
Linux -> Linux kernel

References:

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=acff81ec2c79492b180fade3c2894425cd35a545

http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00039.html

http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00040.html

http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00043.html

http://packetstormsecurity.com/files/135151/Ubuntu-14.04-LTS-15.10-overlayfs-Local-Root.html

http://rhn.redhat.com/errata/RHSA-2016-1532.html

http://rhn.redhat.com/errata/RHSA-2016-1539.html

http://rhn.redhat.com/errata/RHSA-2016-1541.html

http://www.openwall.com/lists/oss-security/2015/12/23/5

http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html

http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html

http://www.securityfocus.com/bid/79671

http://www.securitytracker.com/id/1034548

http://www.ubuntu.com/usn/USN-2857-1

http://www.ubuntu.com/usn/USN-2857-2

http://www.ubuntu.com/usn/USN-2858-1

http://www.ubuntu.com/usn/USN-2858-2

http://www.ubuntu.com/usn/USN-2858-3

https://bugzilla.redhat.com/show_bug.cgi?id=1291329

https://github.com/torvalds/linux/commit/acff81ec2c79492b180fade3c2894425cd35a545

https://www.exploit-db.com/exploits/39166/

https://www.exploit-db.com/exploits/39230/

https://www.exploit-db.com/exploits/40688/

Vulnerability CVE-2015-8660

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.

See advisories in our WLB2 database:

Med.

Overlayfs Privilege Escalation

CWE-264

CVSS2 => (AV:L/AC:L/Au:N/C:C/I:C/A:C)

7.2/10

10/10

3.9/10

Local

Low

No required

Complete

Complete

Complete

Affected software

References: