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Vulnerability Details : CVE-2012-2123

The cap_bprm_set_creds function in security/commoncap.c in the Linux kernel before 3.3.3 does not properly handle the use of file system capabilities (aka fcaps) for implementing a privileged executable file, which allows local users to bypass intended personality restrictions via a crafted application, as demonstrated by an attack that uses a parent process to disable ASLR.
Publish Date : 2012-05-17 Last Update Date : 2013-02-14
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- CVSS Scores & Vulnerability Types

CVSS Score
7.2
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact Complete (There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the entire system being compromised.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Bypass a restriction or similar
CWE ID 264

- Additional Vendor Supplied Data

Vendor Impact CVSS Score CVSS Vector Report Date Publish Date
Redhat important
1.9
AV:L/AC:M/Au:N/C:N/I:P/A:N 2012-03-26 2012-04-17
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- Related OVAL Definitions

Title Definition Id Class Family
DSA-2469-1 linux-2.6 - several oval:org.mitre.oval:def:18394 unix
ELSA-2012:0743: kernel security and bug fix update (Important) oval:org.mitre.oval:def:23889 unix
RHSA-2012:0743: kernel security and bug fix update (Important) oval:com.redhat.rhsa:def:20120743 unix
RHSA-2012:0743: kernel security and bug fix update (Important) oval:org.mitre.oval:def:21473 unix
USN-1457-1 -- linux vulnerabilities oval:org.mitre.oval:def:17420 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2012-2123

# Product Type Vendor Product Version Update Edition Language
1 OS Linux Linux Kernel 3.3.1 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Linux Linux Kernel 1

- References For CVE-2012-2123

http://rhn.redhat.com/errata/RHSA-2012-0743.html
REDHAT RHSA-2012:0743
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.3 CONFIRM
http://www.securityfocus.com/bid/53166
BID 53166 Linux kernel fcaps Local Security Bypass Vulnerability Release Date:2013-11-27
http://www.openwall.com/lists/oss-security/2012/04/20/6
MLIST [oss-security] 20120419 Re: CVE request: kernel: fcaps: clear the same personality flags as suid when fcaps are used
http://www.securitytracker.com/id?1027072
SECTRACK 1027072
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d52fc5dde171f030170a6cb78034d166b13c9445 CONFIRM
https://bugzilla.redhat.com/show_bug.cgi?id=806722 CONFIRM
http://xforce.iss.net/xforce/xfdb/75043
XF linux-kernel-fcaps-sec-bypass(75043)
https://github.com/torvalds/linux/commit/d52fc5dde171f030170a6cb78034d166b13c9445 CONFIRM

- Metasploit Modules Related To CVE-2012-2123

There are not any metasploit modules related to this vulnerability (Please visit www.metasploit.com for more information)


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