MitreCVELIST:CVE-2007-4556CVE-2007-4556
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.
References
forums.opensymphony.com/ann.jspa?annID=54
issues.apache.org/struts/browse/WW-2030
jira.opensymphony.com/browse/XW-544
jira.opensymphony.com/secure/ReleaseNote.jspa?projectId=10050&styleName=Html&version=21701
jira.opensymphony.com/secure/ReleaseNote.jspa?projectId=10050&styleName=Html&version=21706
osvdb.org/37072
secunia.com/advisories/26681
secunia.com/advisories/26693
secunia.com/advisories/26694
struts.apache.org/2.x/docs/s2-001.html
wiki.opensymphony.com/display/WW/1.2.3+Press+Release
www.securityfocus.com/bid/25524
www.vupen.com/english/advisories/2007/3041
www.vupen.com/english/advisories/2007/3042
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