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SPIP 3.1.2 Server Side Request Forgery Vulnerability
Author
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[Security Risk Low
]0day-ID
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Date add
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## SPIP 3.1.2 Server Side Request Forgery (CVE-2016-7999)
### 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
It's possible to send HTTP/FTP requests using the `valider_xml` file.
Attackers can make it look like the server is sending the request, possibly bypassing access controls such as a firewall that would prevent the attacker from accessing the URLs directly.
**Access Vector**: remote
**Security Risk**: medium
**Vulnerability**: CWE-918
**CVSS Base Score**: 5.5 (Medium)
**CVE-ID**: CVE-2016-7999
### Proof of Concept
http://spip-dev.srv/ecrire/?exec=valider_xml&var_url=http://router-dev.srv/
http://spip-dev.srv/ecrire/?exec=valider_xml&var_url=ftp://ftp.debian.org/
### Vulnerable code
The FTP connection is initialized by the `is_dir` function inside `valider_xml`, line 79 :
if (is_dir($url)) {
Other PHP Wrappers supporting `is_dir` can be called using this function.
The HTTP connection is initiated at line 123:
$res = $transformer_xml(recuperer_page($url));
### 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
* 27/09/2016 : Server Side Request Forgery vulnerability correct vulnerabilities.
* 30/09/2016 : SPIP 3.1.3 Released
### Fixes
* https://core.spip.net/projects/spip/repository/revisions/23188
* https://core.spip.net/projects/spip/repository/revisions/23193
### Affected versions
* Version <= 3.1.2
### Credits
* Nicolas CHATELAIN, Sysdream (n.chatelain -at- sysdream -dot- com)
# 0day.today [2024-07-05] #