Vulnerability record · CVE-2009-0023 · published 8 June 2009

CVE-2009-0023: Apache apr-util memory buffer overflow vulnerability

Apache · Apr Util

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.

4.3 CVSS 2.0 Medium EPSS 8.5% · top 5.1% CWE-119 · Memory buffer overflow

4.3CVSS 2.0 base score

8.5%EPSS exploitation probability, 30 days

NoNot in CISA KEV

2Affected product versions listed by NVD

112References

16 Jun 2026Last modified by NVD

Description

AV:N/AC:M/Au:N/C:N/I:N/A:P

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Apr Util Apache

Http Server Apache

References

Link	Tags
http://lists.apple.com/archives/security-announce/2009/Nov/msg00000.html	Mailing ListThird Party Advisory
http://marc.info/?l=bugtraq&m=129190899612998&w=2	Third Party Advisory
http://secunia.com/advisories/34724	Third Party Advisory
http://secunia.com/advisories/35284	Third Party AdvisoryVendor Advisory
http://secunia.com/advisories/35360	Third Party AdvisoryVendor Advisory
http://secunia.com/advisories/35395	Third Party Advisory
http://secunia.com/advisories/35444	Third Party Advisory
http://secunia.com/advisories/35487	Third Party Advisory
http://secunia.com/advisories/35565	Third Party Advisory
http://secunia.com/advisories/35710	Third Party Advisory
http://secunia.com/advisories/35797	Third Party Advisory
http://secunia.com/advisories/35843	Third Party Advisory
http://secunia.com/advisories/37221	Third Party Advisory
http://security.gentoo.org/glsa/glsa-200907-03.xml	Third Party Advisory
http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.538210	Third Party Advisory
http://support.apple.com/kb/HT3937	Third Party Advisory
http://svn.apache.org/viewvc?view=rev&revision=779880	Third Party Advisory
http://wiki.rpath.com/Advisories:rPSA-2009-0144	Third Party Advisory
http://www-01.ibm.com/support/docview.wss?uid=swg1PK88341	Third Party Advisory
http://www-01.ibm.com/support/docview.wss?uid=swg1PK91241	Third Party Advisory
http://www-01.ibm.com/support/docview.wss?uid=swg1PK99478	Third Party Advisory
http://www-01.ibm.com/support/docview.wss?uid=swg27014463	Third Party Advisory
http://www.apache.org/dist/apr/CHANGES-APR-UTIL-1.3	Third Party Advisory
http://www.debian.org/security/2009/dsa-1812	PatchThird Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2009:131	Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2013:150	Third Party Advisory
http://www.oracle.com/technetwork/topics/security/cpuapr2013-1899555.html	Third Party Advisory
http://www.redhat.com/support/errata/RHSA-2009-1107.html	Third Party Advisory
http://www.redhat.com/support/errata/RHSA-2009-1108.html	Third Party Advisory
http://www.securityfocus.com/archive/1/507855/100/0/threaded	Third Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/35221	Third Party AdvisoryVDB Entry
http://www.ubuntu.com/usn/usn-786-1	Third Party Advisory
http://www.ubuntu.com/usn/usn-787-1	Third Party Advisory
http://www.vupen.com/english/advisories/2009/1907	Third Party Advisory
http://www.vupen.com/english/advisories/2009/3184	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=503928	Issue TrackingPatchThird Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/50964	Third Party AdvisoryVDB Entry
https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%	Third Party Advisory
https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%	Third Party Advisory
https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org	Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2009-0023), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.