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Last updated: 8/1/2014 6:01:59 AM

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Vulnerability Summary for CVE-2012-2123

Original release date: 05/17/2012
Last revised: 02/14/2013
Source: US-CERT/NIST

Overview

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.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 7.2 (HIGH) (AV:L/AC:L/Au:N/C:C/I:C/A:C) (legend)
Impact Subscore: 10.0
Exploitability Subscore: 3.9
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service

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External Source: MLIST
Name: [oss-security] 20120419 Re: CVE request: kernel: fcaps: clear the same personality flags as suid when fcaps are used
External Source: XF
Name: linux-kernel-fcaps-sec-bypass(75043)
External Source: SECTRACK
Name: 1027072
External Source: CONFIRM
Name: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d52fc5dde171f030170a6cb78034d166b13c9445
External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=806722
External Source: REDHAT
Name: RHSA-2012:0743
External Source: CONFIRM
Name: http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.3
External Source: BID
Name: 53166
External Source: CONFIRM
Name: https://github.com/torvalds/linux/commit/d52fc5dde171f030170a6cb78034d166b13c9445

Vulnerable software and versions

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Technical Details

Vulnerability Type (View All)
  • Permissions, Privileges, and Access Control (CWE-264)