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

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