Vulnerability CVE-2007-4556
Published: 2007-08-27   Modified: 2012-02-12

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.

Type:

CWE-Other

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.8/10
6.4/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Opensymphony -> Xwork 

 References:
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://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
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