Is CVE-2009-0023 being actively exploited?

CVE-2009-0023 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2009-0023?

CVE-2009-0023 has a CVSS 2.0 base score of 4.3 (MEDIUM).

CVE-2009-0023

MEDIUM · CVSS 4.3EPSS 8.5%EU EUVD

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.

Key facts

CVSS score: 4.3 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness (CWE): CWE-119
EPSS score: 8.5% (95th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2009-0036)
Published: June 8, 2009
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2009-0036 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

apache / apr-util
apache / apr-util
apache / apr-util
apache / apr-util
apache / apr-util
apache / apr-util
apache / apr-util
apache / apr-util
apache / apr-util
apache / apr-util
apache / apr-util
apache / apr-util
apache / apr-util
apache / apr-util
apache / apr-util
apache / apr-util
apache / apr-util
apache / apr-util
apache / apr-util
apache / apr-util
apache / apr-util
apache / http server

References

http://lists.apple.com/archives/security-announce/2009/Nov/msg00000.html(Mailing List, Third 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 Advisory, Vendor Advisory)
http://secunia.com/advisories/35360(Third Party Advisory, Vendor 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(Patch, Third 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 Advisory, VDB Entry)
http://www.securityfocus.com/bid/35221(Third Party Advisory, VDB 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 Tracking, Patch, Third Party Advisory)
https://exchange.xforce.ibmcloud.com/vulnerabilities/50964(Third Party Advisory, VDB Entry)
https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E(Third Party Advisory)
https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E(Third Party Advisory)
https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E(Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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