Vulnerability CVE-2014-8133
Published: 2014-12-17

Description:
arch/x86/kernel/tls.c in the Thread Local Storage (TLS) implementation in the Linux kernel through 3.18.1 allows local users to bypass the espfix protection mechanism, and consequently makes it easier for local users to bypass the ASLR protection mechanism, via a crafted application that makes a set_thread_area system call and later reads a 16-bit value.

See advisories in our WLB2 database:
Topic
Author
Date
High
Linux Kernel 3.2 multiple x86_64 vulnerabilities
Andy Lutomirski
16.12.2014

Type:

CWE-17

 (Code)

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

CVSS Base Score
Impact Subscore
Exploitability Subscore
2.1/10
2.9/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Linux -> Linux kernel 

 References:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=41bdc78544b8a93a9c6814b8bbbfef966272abbe
http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00025.html
http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00015.html
http://rhn.redhat.com/errata/RHSA-2015-1272.html
http://www.debian.org/security/2015/dsa-3128
http://www.mandriva.com/security/advisories?name=MDVSA-2015:058
http://www.openwall.com/lists/oss-security/2014/12/15/6
http://www.securityfocus.com/bid/71684
http://www.ubuntu.com/usn/USN-2490-1
http://www.ubuntu.com/usn/USN-2491-1
http://www.ubuntu.com/usn/USN-2492-1
http://www.ubuntu.com/usn/USN-2493-1
http://www.ubuntu.com/usn/USN-2515-1
http://www.ubuntu.com/usn/USN-2516-1
http://www.ubuntu.com/usn/USN-2517-1
http://www.ubuntu.com/usn/USN-2518-1
https://bugzilla.redhat.com/show_bug.cgi?id=1172797
https://github.com/torvalds/linux/commit/41bdc78544b8a93a9c6814b8bbbfef966272abbe
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