Vulnerability CVE-2016-1583

Vulnerability CVE-2016-1583

Published: 2016-06-27

Description:

The ecryptfs_privileged_open function in fs/ecryptfs/kthread.c in the Linux kernel before 4.6.3 allows local users to gain privileges or cause a denial of service (stack memory consumption) via vectors involving crafted mmap calls for /proc pathnames, leading to recursive pagefault handling.

See advisories in our WLB2 database:

	Topic	Author	Date
High	Linux ecryptfs and /proc/$pid/environ Privilege Escalation	Google Security ...	22.06.2016

Type:

CWE-119

(Improper Restriction of Operations within the Bounds of a Memory Buffer)

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
Novell -> Suse linux enterprise software development kit
Novell -> Suse linux enterprise debuginfo
Novell -> Suse linux enterprise desktop
Novell -> Suse linux enterprise live patching
Novell -> Suse linux enterprise module for public cloud
Novell -> Suse linux enterprise server
Novell -> Suse linux enterprise workstation extension
Linux -> Linux kernel
Canonical -> Ubuntu linux

References:

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2f36db71009304b3f0b95afacd8eba1f9f046b87

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f5364c150aa645b3d7daa21b5c0b9feaa1c9cd6d

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00027.html

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00052.html

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00056.html

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.html

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00003.html

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00007.html

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00008.html

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00009.html

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00014.html

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00016.html

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00018.html

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00019.html

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00020.html

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00021.html

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00022.html

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00026.html

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00044.html

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00055.html

http://packetstormsecurity.com/files/137560/Linux-ecryptfs-Stack-Overflow.html

http://rhn.redhat.com/errata/RHSA-2016-2124.html

http://rhn.redhat.com/errata/RHSA-2016-2766.html

http://www.debian.org/security/2016/dsa-3607

http://www.openwall.com/lists/oss-security/2016/06/10/8

http://www.openwall.com/lists/oss-security/2016/06/22/1

http://www.securityfocus.com/bid/91157

http://www.securitytracker.com/id/1036763

http://www.ubuntu.com/usn/USN-2996-1

http://www.ubuntu.com/usn/USN-2997-1

http://www.ubuntu.com/usn/USN-2998-1

http://www.ubuntu.com/usn/USN-2999-1

http://www.ubuntu.com/usn/USN-3000-1

http://www.ubuntu.com/usn/USN-3001-1

http://www.ubuntu.com/usn/USN-3002-1

http://www.ubuntu.com/usn/USN-3003-1

http://www.ubuntu.com/usn/USN-3004-1

http://www.ubuntu.com/usn/USN-3005-1

http://www.ubuntu.com/usn/USN-3006-1

http://www.ubuntu.com/usn/USN-3007-1

http://www.ubuntu.com/usn/USN-3008-1

https://access.redhat.com/errata/RHSA-2017:2760

https://bugs.chromium.org/p/project-zero/issues/detail?id=836

https://bugzilla.redhat.com/show_bug.cgi?id=1344721

https://github.com/torvalds/linux/commit/2f36db71009304b3f0b95afacd8eba1f9f046b87

https://github.com/torvalds/linux/commit/f0fe970df3838c202ef6c07a4c2b36838ef0a88b

https://github.com/torvalds/linux/commit/f5364c150aa645b3d7daa21b5c0b9feaa1c9cd6d

https://www.exploit-db.com/exploits/39992/

https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.3

Vulnerability CVE-2016-1583

The ecryptfs_privileged_open function in fs/ecryptfs/kthread.c in the Linux kernel before 4.6.3 allows local users to gain privileges or cause a denial of service (stack memory consumption) via vectors involving crafted mmap calls for /proc pathnames, leading to recursive pagefault handling.

See advisories in our WLB2 database:

High

Linux ecryptfs and /proc/$pid/environ Privilege Escalation

CWE-119

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: