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CVE-2009-1337

4.4 · MEDIUM

The exit_notify function in kernel/exit.c in the Linux kernel before 2.6.30-rc1 does not restrict exit signals when the CAP_KILL capability is held, which allows local users to send an arbitrary si…

Published Apr 22, 2009linuxCWE-264EPSS 1.26%

Overview

CVE-2009-1337 is a medium-severity vulnerability affecting linux linux_kernel. It was published on April 22, 2009 and has a CVSS 2.0 base score of 4.4 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 4.4, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

The exit_notify function in kernel/exit.c in the Linux kernel before 2.6.30-rc1 does not restrict exit signals when the CAP_KILL capability is held, which allows local users to send an arbitrary signal to a process by running a program that modifies the exit_signal field and then uses an exec system call to launch a setuid application.

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_kernel0Affected

References

Refgit.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=432870dab85a2f69dc417022646cb9a70acf7f94Reflists.opensuse.org/opensuse-security-announce/2009-05/msg00002.htmlReflists.opensuse.org/opensuse-security-announce/2009-06/msg00000.htmlReflists.opensuse.org/opensuse-security-announce/2009-06/msg00001.htmlReflists.opensuse.org/opensuse-security-announce/2009-06/msg00002.htmlRefmarc.info/?l=linux-kernel&m=123560588713763&w=2Refpatchwork.kernel.org/patch/16544/Refrhn.redhat.com/errata/RHSA-2009-0473.htmlRefsecunia.com/advisories/34917Refsecunia.com/advisories/34981

How CyberStrike helps

Frequently asked questions

What is CVE-2009-1337?

CVE-2009-1337 is a medium-severity vulnerability affecting linux linux_kernel. It was published on April 22, 2009 and has a CVSS 2.0 base score of 4.4 (MEDIUM).

How severe is CVE-2009-1337?

This vulnerability has a CVSS 2.0 base score of 4.4, rated MEDIUM. 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-2009-1337?

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-2009-1337?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-1337 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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