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CVE-2001-1559

5.5 · MEDIUM

The uipc system calls (uipc_syscalls.c) in OpenBSD 2.9 and 3.0 provide user mode return instead of versus rval kernel mode values to the fdrelease function, which allows local users to cause a deni…

Published Dec 31, 2001openbsdCWE-476EPSS 1.48%

Overview

CVE-2001-1559 is a medium-severity vulnerability affecting openbsd openbsd. It was published on December 31, 2001 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

The uipc system calls (uipc_syscalls.c) in OpenBSD 2.9 and 3.0 provide user mode return instead of versus rval kernel mode values to the fdrelease function, which allows local users to cause a denial of service and trigger a null dereference.

Remediation

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

Refarchives.neohapsis.com/archives/bugtraq/2001-12/0014.htmlRefmonkey.org/openbsd/archive/tech/0112/msg00015.htmlRefwww.iss.net/security_center/static/7690.phpRefarchives.neohapsis.com/archives/bugtraq/2001-12/0014.htmlRefmonkey.org/openbsd/archive/tech/0112/msg00015.htmlRefwww.iss.net/security_center/static/7690.php

How CyberStrike helps

Frequently asked questions

What is CVE-2001-1559?

CVE-2001-1559 is a medium-severity vulnerability affecting openbsd openbsd. It was published on December 31, 2001 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2001-1559?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2001-1559?

Check the references section for vendor advisories and patches from openbsd. Update openbsd 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-2001-1559?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2001-1559 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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