XML Entity Expansion

symfony/symfony is vulnerable to XML Entity Expansion. The vulnerability is due to all extensions that use libxml2 having no defense against Quadratic Blowup Attacks, which involve defining a long entity that is repeatedly referenced within the XML document, thus creating a potential memory sink...

symfony/validator XML Entity Expansion vulnerability

Symfony 2.0.11 carried a similar XXE security fix, however, on review of ZF2 I also noted a vulnerability to XML Entity Expansion XEE attacks whereby all extensions making use of libxml2 have no defense against XEE Quadratic Blowup Attacks. The vulnerability is a function of there being no curren...