The apache2handler SAPI (sapi_apache2.c) in the Apache module (mod_php) for PHP 5.x before 5.1.0 final and 4.4 before 4.4.1 final allows attackers to cause a denial of service (segmentation fault) via the session.save_path option in a .htaccess file or VirtualHost.
https://www.ubuntu.com/usn/usn-232-1/
https://exchange.xforce.ibmcloud.com/vulnerabilities/22844
http://www.vupen.com/english/advisories/2006/4320
http://www.vupen.com/english/advisories/2006/0791
http://www.us-cert.gov/cas/techalerts/TA06-062A.html
http://www.securityfocus.com/bid/16907
http://www.securityfocus.com/bid/15177
http://www.mandriva.com/security/advisories?name=MDKSA-2005:213
http://www.gentoo.org/security/en/glsa/glsa-200511-08.xml
http://securityreason.com/securityalert/525
http://secunia.com/advisories/22691
http://secunia.com/advisories/19064
http://secunia.com/advisories/18198
http://secunia.com/advisories/17557
http://secunia.com/advisories/17510
http://marc.info/?l=bugtraq&m=113019286208204&w=2
http://lists.apple.com/archives/security-announce/2006/Mar/msg00000.html
http://itrc.hp.com/service/cki/docDisplay.do?docId=c00786522
http://docs.info.apple.com/article.html?artnum=303382
http://bugs.gentoo.org/show_bug.cgi?id=107602
http://archives.neohapsis.com/archives/fulldisclosure/2005-10/0491.html