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CVE-2009-3527

6.9 · MEDIUM

Race condition in the Pipe (IPC) close function in FreeBSD 6.3 and 6.4 allows local users to cause a denial of service (crash) or gain privileges via vectors related to kqueues, which triggers a us…

Published Oct 6, 2009freebsdCWE-362EPSS 0.55%

Overview

CVE-2009-3527 is a medium-severity vulnerability affecting freebsd freebsd. It was published on October 6, 2009 and has a CVSS 2.0 base score of 6.9 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 6.9, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

Race condition in the Pipe (IPC) close function in FreeBSD 6.3 and 6.4 allows local users to cause a denial of service (crash) or gain privileges via vectors related to kqueues, which triggers a use after free, leading to a NULL pointer dereference or memory corruption.

Remediation

Check the references section for vendor advisories and patches from freebsd. Update freebsd 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

Refosvdb.org/58544Refsecurity.freebsd.org/advisories/FreeBSD-SA-09:13.pipe.ascRefwww.securityfocus.com/archive/1/506449Refwww.securityfocus.com/bid/36375Refwww.securitytracker.com/id?1022982Refosvdb.org/58544Refsecurity.freebsd.org/advisories/FreeBSD-SA-09:13.pipe.ascRefwww.securityfocus.com/archive/1/506449Refwww.securityfocus.com/bid/36375Refwww.securitytracker.com/id?1022982

How CyberStrike helps

Frequently asked questions

What is CVE-2009-3527?

CVE-2009-3527 is a medium-severity vulnerability affecting freebsd freebsd. It was published on October 6, 2009 and has a CVSS 2.0 base score of 6.9 (MEDIUM).

How severe is CVE-2009-3527?

This vulnerability has a CVSS 2.0 base score of 6.9, 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-2009-3527?

Check the references section for vendor advisories and patches from freebsd. Update freebsd 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-2009-3527?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-3527 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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