Quick answers
- Is CVE-2016-7980 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2016-7980 being exploited in the wild.
- How severe is CVE-2016-7980?
- High severity, with a CVSS score of 8.8, published 18 January 2017.
- Which products and versions are affected?
- SPIP SPIP <= 3.1.2.
- Is there a fix for CVE-2016-7980?
- A patch was published on 2016-09-28: Fixes issued for CSRF issue Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2016-7980 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2016-7980?
- Check whether you run Spip. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A Cross-Site Request Forgery (CSRF) vulnerability exists in 'ecrire/exec/valider_xml.php' in SPIP versions 3.1.2 and earlier. The application fails to validate a unique token for requests sent to the XML validator component, allowing a remote attacker to craft a malicious URL that, if visited by a logged-in administrator, executes the 'valider_xml' action. This vulnerability is particularly dangerous as it can be chained with CVE-2016-7998 (a PHP code execution flaw in the template compiler) to achieve full remote code execution (RCE). The issue was resolved in SPIP 3.1.3 by implementing 'var_token' validation and restricting execution rights to webmasters.
Affected products
- SPIP SPIP <= 3.1.2
Timeline
- 2016-09-15: disclosed: Initial discovery by Sysdream Labs
- 2016-09-28: patched: Fixes issued for CSRF issue
- 2016-09-30: patched: SPIP 3.1.3 released
- 2017-01-18: advisory: NVD published date
References
- http://www.openwall.com/lists/oss-security/2016/10/05/17
- http://www.openwall.com/lists/oss-security/2016/10/06/6
- http://www.openwall.com/lists/oss-security/2016/10/12/6
- http://www.securityfocus.com/bid/93451
- https://core.spip.net/projects/spip/repository/revisions/23201
- https://core.spip.net/projects/spip/repository/revisions/23202
- https://core.spip.net/projects/spip/repository/revisions/23203