Zendframework Denial of Service vector via XEE injection

Impact

Zend_Dom, Zend_Feed, Zend_Soap, and Zend_XmlRpc are vulnerable to XML Entity Expansion (XEE) vectors, leading to Denial of Service vectors. XEE attacks occur when the XML DOCTYPE declaration includes XML entity definitions that contain either recursive or circular references; this leads to CPU and memory consumption, making Denial of Service exploits trivial to implement.

Affected packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

Original source description

References

• Security advisory framework.zend.com/security/advisory/ZF2012-02
• Security advisory github.com/FriendsOfPHP/security-advisories/blob/master/zendframework/zendframework1/ZF2012-02.yaml
• Source reference github.com/zendframework/zf1