Adobe Flash Player before 9.0.277.0 and 10.x before 10.1.53.64, and Adobe AIR before 2.0.2.12610, allows remote web servers to cause a denial of service (NULL pointer dereference and browser crash) by returning a different response when an HTTP request is sent a second time, as demonstrated by two responses that provide SWF files with different SWF version numbers.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7187
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16302
https://exchange.xforce.ibmcloud.com/vulnerabilities/45630
http://www.vupen.com/english/advisories/2011/0192
http://www.vupen.com/english/advisories/2010/1793
http://www.vupen.com/english/advisories/2010/1522
http://www.vupen.com/english/advisories/2010/1482
http://www.vupen.com/english/advisories/2010/1453
http://www.vupen.com/english/advisories/2010/1434
http://www.vupen.com/english/advisories/2010/1432
http://www.vupen.com/english/advisories/2010/1421
http://www.us-cert.gov/cas/techalerts/TA10-162A.html
http://www.turbolinux.co.jp/security/2010/TLSA-2010-19j.txt
http://www.securityfocus.com/bid/31537
http://www.securityfocus.com/archive/1/496929/100/0/threaded
http://www.redhat.com/support/errata/RHSA-2010-0470.html
http://www.redhat.com/support/errata/RHSA-2010-0464.html
http://www.adobe.com/support/security/bulletins/apsb10-14.html
http://support.apple.com/kb/HT4435
http://securitytracker.com/id?1024086
http://securitytracker.com/id?1024085
http://securityreason.com/securityalert/4401
http://security.gentoo.org/glsa/glsa-201101-09.xml
http://secunia.com/advisories/43026
http://secunia.com/advisories/40545
http://secunia.com/advisories/32759
http://lists.opensuse.org/opensuse-security-announce/2010-06/msg00001.html
http://lists.opensuse.org/opensuse-security-announce/2010-06/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2008-11/msg00001.html
http://lists.apple.com/archives/security-announce/2010//Nov/msg00000.html
http://itrc.hp.com/service/cki/docDisplay.do?docId=emr_na-c02273751