Description
The REST Plugin in Apache Struts 2.1.1 through 2.3.x before 2.3.34 and 2.5.x before 2.5.13 uses an XStreamHandler with an instance of XStream for deserialization without any type filtering, which can lead to Remote Code Execution when deserializing XML payloads.
Remediation
References
http://www.oracle.com/technetwork/security-advisory/alert-cve-2017-9805-3889403.html
http://www.securityfocus.com/bid/100609
http://www.securitytracker.com/id/1039263
https://blogs.apache.org/foundation/entry/apache-struts-statement-on-equifax
https://bugzilla.redhat.com/show_bug.cgi?id=1488482
https://cwiki.apache.org/confluence/display/WW/S2-052
https://lgtm.com/blog/apache_struts_CVE-2017-9805
https://security.netapp.com/advisory/ntap-20170907-0001/
https://struts.apache.org/docs/s2-052.html
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170907-struts2
https://www.exploit-db.com/exploits/42627/
https://www.kb.cert.org/vuls/id/112992
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-9805
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