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CVE-2009-0023

4.3 · MEDIUM

The apr_strmatch_precompile function in strmatch/apr_strmatch.c in Apache APR-util before 1.3.5 allows remote attackers to cause a denial of service (daemon crash) via crafted input involving (1) a…

Published Jun 8, 2009apacheCWE-119EPSS 8.53%

Overview

CVE-2009-0023 is a medium-severity vulnerability affecting apache apr-util. It was published on June 8, 2009 and has a CVSS 2.0 base score of 4.3 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The apr_strmatch_precompile function in strmatch/apr_strmatch.c in Apache APR-util before 1.3.5 allows remote attackers to cause a denial of service (daemon crash) via crafted input involving (1) a .htaccess file used with the Apache HTTP Server, (2) the SVNMasterURI directive in the mod_dav_svn module in the Apache HTTP Server, (3) the mod_apreq2 module for the Apache HTTP Server, or (4) an application that uses the libapreq2 library, which triggers a heap-based buffer underflow.

Remediation

Check the references section for vendor advisories and patches from apache. Update apr-util 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
apacheapr-util0Affected
apachehttp_server>= 2.2.0, < 2.2.12Affected

References

Reflists.apple.com/archives/security-announce/2009/Nov/msg00000.htmlRefmarc.info/?l=bugtraq&m=129190899612998&w=2Refsecunia.com/advisories/34724Refsecunia.com/advisories/35284Refsecunia.com/advisories/35360Refsecunia.com/advisories/35395Refsecunia.com/advisories/35444Refsecunia.com/advisories/35487Refsecunia.com/advisories/35565Refsecunia.com/advisories/35710

How CyberStrike helps

Frequently asked questions

What is CVE-2009-0023?

CVE-2009-0023 is a medium-severity vulnerability affecting apache apr-util. It was published on June 8, 2009 and has a CVSS 2.0 base score of 4.3 (MEDIUM).

How severe is CVE-2009-0023?

This vulnerability has a CVSS 2.0 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2009-0023?

Check the references section for vendor advisories and patches from apache. Update apr-util 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-2009-0023?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-0023 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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