Versions of Apache 2.2 earlier than 2.2.22 are potentially affected by the following vulnerabilities :
When configured as a reverse proxy, improper use of the RewriteRule and ProxyPasssMatch directives could cause the web server to proxy requests to arbitrary hosts. This could allow a remote attacker to indirectly send request to intranet servers. (CVE-2011-3368, CVE-2011-4317)
A heap-based buffer overflow exists when mod_setenvif module is enabled and both a maliciously crafted ‘SetEnvIf’ directive and a maliciously crafted HTTP request header are used. (CVE-2011-3607)
A format string handling error can allow the server to be crashed via maliciously crafted cookies. (CVE-2012-0021)
An error exists in ‘scoreboard.c’ that can allow local attackers to crash the server during shutdown. (CVE-2012-0031)
An error exists in ‘protocol.c’ that can allow ‘HTTPOnly’ cookies to be exposed to attackers through the malicious use of either long or malformed HTTP headers. (CVE-2012-0053)
An error in the mod_proxy_ajp module when used to connect to a backend server that takes an overly long time to respond could lead to a temporary denial of service. (CVE-2012-4557)
Binary data 800552.prm
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-3368
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-3607
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4317
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0021
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0031
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0053
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-4557
httpd.apache.org/security/vulnerabilities_22.html
www.apache.org/dist/httpd/CHANGES_2.2.22