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.
https://www.redhat.com/archives/fedora-package-announce/2009-June/msg01228.html
https://www.redhat.com/archives/fedora-package-announce/2009-June/msg01201.html
https://www.redhat.com/archives/fedora-package-announce/2009-June/msg01173.html
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12321
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10968
https://exchange.xforce.ibmcloud.com/vulnerabilities/50964
https://bugzilla.redhat.com/show_bug.cgi?id=503928
http://www.vupen.com/english/advisories/2009/3184
http://www.vupen.com/english/advisories/2009/1907
http://www.ubuntu.com/usn/usn-787-1
http://www.ubuntu.com/usn/usn-786-1
http://www.securityfocus.com/bid/35221
http://www.securityfocus.com/archive/1/507855/100/0/threaded
http://www.redhat.com/support/errata/RHSA-2009-1108.html
http://www.redhat.com/support/errata/RHSA-2009-1107.html
http://www.oracle.com/technetwork/topics/security/cpuapr2013-1899555.html
http://www.mandriva.com/security/advisories?name=MDVSA-2013:150
http://www.mandriva.com/security/advisories?name=MDVSA-2009:131
http://www.debian.org/security/2009/dsa-1812
http://www.apache.org/dist/apr/CHANGES-APR-UTIL-1.3
http://www-01.ibm.com/support/docview.wss?uid=swg27014463
http://www-01.ibm.com/support/docview.wss?uid=swg1PK99478
http://www-01.ibm.com/support/docview.wss?uid=swg1PK91241
http://www-01.ibm.com/support/docview.wss?uid=swg1PK88341
http://wiki.rpath.com/Advisories:rPSA-2009-0144
http://svn.apache.org/viewvc?view=rev&revision=779880
http://support.apple.com/kb/HT3937
http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.538210
http://security.gentoo.org/glsa/glsa-200907-03.xml
http://secunia.com/advisories/37221
http://secunia.com/advisories/35843
http://secunia.com/advisories/35797
http://secunia.com/advisories/35710
http://secunia.com/advisories/35565
http://secunia.com/advisories/35487
http://secunia.com/advisories/35444
http://secunia.com/advisories/35395
http://secunia.com/advisories/35360
http://secunia.com/advisories/35284
http://secunia.com/advisories/34724
http://marc.info/?l=bugtraq&m=129190899612998&w=2
http://lists.apple.com/archives/security-announce/2009/Nov/msg00000.html