Permissions, privileges, and access controls in Linux kernel - CVE-2012-2123

Vulnerability identifier: #VU92540

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2012-2123

CWE-ID: CWE-264

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to execute arbitrary code.

The vulnerability exists due to security restrictions bypass error. A local user can execute arbitrary code.

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-image-2.6.32-345-ec2 (Ubuntu package)
linux-lts-backport-natty (Ubuntu package)
linux-lts-backport-oneiric (Ubuntu package)

Install update from vendor's repository.

linux (Ubuntu package) - addressed in versions 2.6.32-41.89, 2.6.38-15.60, 3.0.0-20.34, 3.2.0-24.38
linux-image-2.6.32-345-ec2 (Ubuntu package) - update to 2.6.32-345.48
linux-lts-backport-natty (Ubuntu package) - update to 2.6.38-15.60~lucid1
linux-lts-backport-oneiric (Ubuntu package) - update to 3.0.0-20.34~lucid1

• https://bugzilla.redhat.com/show_bug.cgi?id=806722
• http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.3
• https://github.com/torvalds/linux/commit/d52fc5dde171f030170a6cb78034d166b13c9445
• http://www.openwall.com/lists/oss-security/2012/04/20/6
• http://www.securityfocus.com/bid/53166
• http://www.securitytracker.com/id?1027072
• http://rhn.redhat.com/errata/RHSA-2012-0743.html
• https://exchange.xforce.ibmcloud.com/vulnerabilities/75043
• http://www.debian.org/security/2012/dsa-2469
• http://rhn.redhat.com/errata/RHSA-2012-0670.html
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=d52fc5dde171f030170a6cb78034d166b13c9445

• Permissions, privileges, and access controls in Linux kernel
• Ubuntu update for linux-ec2
• Ubuntu update for linux
• Ubuntu update for linux
• Ubuntu update for linux
• Ubuntu update for linux-lts-backport-oneiric
• Ubuntu update for linux
• Ubuntu update for linux-lts-backport-natty