SPIP 3.1.2 - Cross-Site Request Forgery

## SPIP 3.1.2 Exec Code Cross-Site Request Forgery (CVE-2016-7980)



### Product Description



SPIP is a publishing system for the Internet, which put importance on collaborative working, multilingual environments and ease of use. It is free software, distributed under the GNU/GPL licence.



### Vulnerability Description



The vulnerable request to `valider_xml` (see: *SPIP 3.1.2 Template Compiler/Composer PHP Code Execution - CVE-2016-7998*) is vulnerable to Cross-Site Request Forgery, allowing the execution of the CVE-2016-7998 attack by tricking an administrator to open the malicious link.



**Access Vector**: remote



**Security Risk**: high



**Vulnerability**: CWE-352



**CVSS Base Score**: 8.3 (High)



**CVE-ID**: CVE-2016-7980



### Proof of Concept



    http://spip-dev.srv/ecrire/?exec=valider_xml&var_url=/tmp/directory&ext=html



### Timeline (dd/mm/yyyy)



* 15/09/2016 : Initial discovery

* 26/09/2016 : Contact with SPIP Team

* 27/09/2016 : Answer from SPIP Team, sent advisory details

* 28/09/2016 : Fixes issued for CSRF

* 30/09/2016 : SPIP 3.1.3 Released



### Fixes



* https://core.spip.net/projects/spip/repository/revisions/23200

* https://core.spip.net/projects/spip/repository/revisions/23201

* https://core.spip.net/projects/spip/repository/revisions/23202





### Affected versions



* Version <= 3.1.2



### Credits



* Nicolas CHATELAIN, Sysdream (n.chatelain -at- sysdream -dot- com)



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