CVE-2007-4556 Information

Description

Struts support in OpenSymphony XWork before 1.2.3 and 2.x before 2.0.4 as used in WebWork and Apache Struts recursively evaluates all input as an Object-Graph Navigation Language (OGNL) expression when altSyntax is enabled which allows remote attackers to cause a denial of service (infinite loop) or execute arbitrary code via form input beginning with a \ sequence and ending with a \ character.

Reference

http://forums.opensymphony.com/ann.jspa?annID=54 http://issues.apache.org/struts/browse/WW-2030 http://jira.opensymphony.com/browse/XW-544 http://jira.opensymphony.com/secure/ReleaseNote.jspa?projectId=10050&styleName=Html&version=21701 http://jira.opensymphony.com/secure/ReleaseNote.jspa?projectId=10050&styleName=Html&version=21706 http://osvdb.org/37072 http://secunia.com/advisories/26681 http://secunia.com/advisories/26693 http://secunia.com/advisories/26694 http://struts.apache.org/2.x/docs/s2-001.html http://wiki.opensymphony.com/display/WW/1.2.3+Press+Release http://www.securityfocus.com/bid/25524 http://www.vupen.com/english/advisories/2007/3041 http://www.vupen.com/english/advisories/2007/3042