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CVE-2009-3286

4.6 · MEDIUM

NFSv4 in the Linux kernel 2.6.18, and possibly other versions, does not properly clean up an inode when an O_EXCL create fails, which causes files to be created with insecure settings such as setui…

Published Sep 22, 2009linuxCWE-264EPSS 0.47%

Overview

CVE-2009-3286 is a medium-severity vulnerability affecting linux linux_kernel. It was published on September 22, 2009 and has a CVSS 2.0 base score of 4.6 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 4.6, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

NFSv4 in the Linux kernel 2.6.18, and possibly other versions, does not properly clean up an inode when an O_EXCL create fails, which causes files to be created with insecure settings such as setuid bits, and possibly allows local users to gain privileges, related to the execution of the do_open_permission function even when a create fails.

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

References

Refgit.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=81ac95c5Reflists.opensuse.org/opensuse-security-announce/2010-02/msg00005.htmlReflists.vmware.com/pipermail/security-announce/2010/000082.htmlRefsecunia.com/advisories/37105Refsecunia.com/advisories/38794Refsecunia.com/advisories/38834Refwww.openwall.com/lists/oss-security/2009/09/21/2Refwww.ubuntu.com/usn/USN-852-1Refwww.vupen.com/english/advisories/2010/0528Refbugzilla.redhat.com/show_bug.cgi?id=524520

How CyberStrike helps

Frequently asked questions

What is CVE-2009-3286?

CVE-2009-3286 is a medium-severity vulnerability affecting linux linux_kernel. It was published on September 22, 2009 and has a CVSS 2.0 base score of 4.6 (MEDIUM).

How severe is CVE-2009-3286?

This vulnerability has a CVSS 2.0 base score of 4.6, 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-2009-3286?

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-2009-3286?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-3286 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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