The ap_read_request function in server/protocol.c in the Apache HTTP Server 2.2.x before 2.2.15, when a multithreaded MPM is used, does not properly handle headers in subrequests in certain circumstances involving a parent request that has a body, which might allow remote attackers to obtain sensitive information via a crafted request that triggers access to memory locations associated with an earlier request.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8695
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10358
https://issues.apache.org/bugzilla/show_bug.cgi?id=48359
https://exchange.xforce.ibmcloud.com/vulnerabilities/56625
https://bugzilla.redhat.com/show_bug.cgi?id=570171
http://www.vupen.com/english/advisories/2010/1411
http://www.vupen.com/english/advisories/2010/1057
http://www.vupen.com/english/advisories/2010/1001
http://www.vupen.com/english/advisories/2010/0994
http://www.vupen.com/english/advisories/2010/0911
http://www.vmware.com/security/advisories/VMSA-2010-0014.html
http://www.securityfocus.com/bid/38494
http://www.redhat.com/support/errata/RHSA-2010-0175.html
http://www.redhat.com/support/errata/RHSA-2010-0168.html
http://www.oracle.com/technetwork/topics/security/cpujuly2013-1899826.html
http://www.debian.org/security/2010/dsa-2035
http://www-01.ibm.com/support/docview.wss?uid=swg1PM15829
http://www-01.ibm.com/support/docview.wss?uid=swg1PM12247
http://www-01.ibm.com/support/docview.wss?uid=swg1PM08939
http://svn.apache.org/viewvc?view=revision&revision=918427
http://svn.apache.org/viewvc?view=revision&revision=917867
http://secunia.com/advisories/40096
http://secunia.com/advisories/39656
http://secunia.com/advisories/39632
http://secunia.com/advisories/39628
http://secunia.com/advisories/39501
http://secunia.com/advisories/39115
http://secunia.com/advisories/39100
http://marc.info/?l=bugtraq&m=127557640302499&w=2
http://lists.vmware.com/pipermail/security-announce/2010/000105.html
http://lists.opensuse.org/opensuse-security-announce/2010-04/msg00006.html
http://lists.fedoraproject.org/pipermail/package-announce/2010-May/040652.html
http://lists.fedoraproject.org/pipermail/package-announce/2010-April/039957.html