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CVE-2012-2123

7.2 · HIGH

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 execu…

Published May 17, 2012linuxCWE-264EPSS 0.40%

Overview

CVE-2012-2123 is a high-severity vulnerability affecting linux linux_kernel. It was published on May 17, 2012 and has a CVSS 2.0 base score of 7.2 (HIGH).

This vulnerability has a CVSS 2.0 base score of 7.2, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
linuxlinux_kernel>= 0, < 3.0.29Affected

References

Refgit.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=d52fc5dde171f030170a6cb78034d166b13c9445Refrhn.redhat.com/errata/RHSA-2012-0670.htmlRefrhn.redhat.com/errata/RHSA-2012-0743.htmlRefwww.debian.org/security/2012/dsa-2469Refwww.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.3Refwww.openwall.com/lists/oss-security/2012/04/20/6Refwww.securityfocus.com/bid/53166Refwww.securitytracker.com/id?1027072Refbugzilla.redhat.com/show_bug.cgi?id=806722Refexchange.xforce.ibmcloud.com/vulnerabilities/75043

How CyberStrike helps

Frequently asked questions

What is CVE-2012-2123?

CVE-2012-2123 is a high-severity vulnerability affecting linux linux_kernel. It was published on May 17, 2012 and has a CVSS 2.0 base score of 7.2 (HIGH).

How severe is CVE-2012-2123?

This vulnerability has a CVSS 2.0 base score of 7.2, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2012-2123?

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2012-2123?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2012-2123 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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