CVE-2023-41034 – DDFFileParser in eclipse leshan is vulnerable to XXE Attacks

https://notcve.org/view.php?id=CVE-2023-41034

Eclipse Leshan is a device management server and client Java implementation. In affected versions DDFFileParser` and `DefaultDDFFileValidator` (and so `ObjectLoader`) are vulnerable to `XXE Attacks`. A DDF file is a LWM2M format used to store LWM2M object description. Leshan users are impacted only if they parse untrusted DDF files (e.g. if they let external users provide their own model), in that case they MUST upgrade to fixed version. If you parse only trusted DDF file and validate only with trusted xml schema, upgrading is not mandatory. • https://github.com/eclipse-leshan/leshan/commit/29577d2879ba8e7674c3b216a7f01193fc7ae013 https://github.com/eclipse-leshan/leshan/commit/4d3e63ac271a817f81fba3e3229c519af7a3049c https://github.com/eclipse-leshan/leshan/security/advisories/GHSA-wc9j-gc65-3cm7 https://github.com/eclipse-leshan/leshan/wiki/Adding-new-objects#the-lwm2m-model https://owasp.org/www-community/vulnerabilities/XML_External_Entity_(XXE)_Processing • CWE-611: Improper Restriction of XML External Entity Reference •