An XML external entities (XXE) injection vulnerability in the /init API endpoint in Exagid EX10 before 6.4.0 P20, 7.0.1 P12, and 7.2.0 P08 allows an authenticated, unprivileged attacker to achieve information disclosure and privilege escalation via a crafted ISys XML message.
Weakness
The product accepts XML from an untrusted source but does not validate the XML against the proper schema.
Potential Mitigations
- Always validate XML input against a known XML Schema or DTD.
- It is not possible for an XML parser to validate all aspects of a document’s content because a parser cannot understand the complete semantics of the data. However, a parser can do a complete and thorough job of checking the document’s structure and therefore guarantee to the code that processes the document that the content is well-formed.
References