{"id":"CVE-2023-41034","aliases":["EUVD-2023-2373","GHSA-wc9j-gc65-3cm7"],"status":"published","title":"DDFFileParser in eclipse leshan is vulnerable to XXE Attacks","description":"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.  This issue has been fixed in versions 1.5.0 and 2.0.0-M13. Users are advised to upgrade. There are no known workarounds for this vulnerability.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.0069,"percentile":0.533,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-611"],"published":"2023-08-31T17:01:38Z","modified":"2026-10-28T10:36:22Z","fixes":[{"ecosystem":"Maven","package":"org.eclipse.leshan:leshan-core","fixed_in":["1.5.0","2.0.0-M13"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"org.eclipse.leshan:leshan-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.5.0"}]}]},{"source":"ghsa","ecosystem":"Maven","package":"org.eclipse.leshan:leshan-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0-M1"},{"fixed":"2.0.0-M13"}]}]},{"source":"osv","ecosystem":"Maven","package":"org.eclipse.leshan:leshan-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.5.0"}]}],"versions":["0.1.10","0.1.11-M1","0.1.11-M10","0.1.11-M11","0.1.11-M12","0.1.11-M13","0.1.11-M14","0.1.11-M2","0.1.11-M3","0.1.11-M4","0.1.11-M5","0.1.11-M6","0.1.11-M7","0.1.11-M8","0.1.11-M9","1.0.0","1.0.0-M1","1.0.0-M10","1.0.0-M11","1.0.0-M12","1.0.0-M13","1.0.0-M2","1.0.0-M3","1.0.0-M4","1.0.0-M5","1.0.0-M6","1.0.0-M7","1.0.0-M8","1.0.0-M9","1.0.0-RC1","1.0.0-RC2","1.0.1","1.0.2","1.1.0","1.2.0","1.3.0","1.3.1","1.3.2","1.4.0","1.4.1","1.4.2"]},{"source":"osv","ecosystem":"Maven","package":"org.eclipse.leshan:leshan-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0-M1"},{"fixed":"2.0.0-M13"}]}],"versions":["2.0.0-M1","2.0.0-M10","2.0.0-M11","2.0.0-M12","2.0.0-M2","2.0.0-M3","2.0.0-M4","2.0.0-M5","2.0.0-M6","2.0.0-M7","2.0.0-M8","2.0.0-M9"]}],"products":[{"vendor":"eclipse","product":"leshan"},{"vendor":"eclipse-leshan","product":"leshan"}],"references":[{"url":"https://github.com/eclipse-leshan/leshan/security/advisories/GHSA-wc9j-gc65-3cm7","tags":["x_refsource_CONFIRM","x_transferred","Mitigation","Third Party Advisory","advisory","web"]},{"url":"https://github.com/eclipse-leshan/leshan/commit/29577d2879ba8e7674c3b216a7f01193fc7ae013","tags":["x_refsource_MISC","x_transferred","Patch","fix","web"]},{"url":"https://github.com/eclipse-leshan/leshan/commit/4d3e63ac271a817f81fba3e3229c519af7a3049c","tags":["x_refsource_MISC","x_transferred","Patch","fix","web"]},{"url":"https://github.com/eclipse-leshan/leshan/wiki/Adding-new-objects#the-lwm2m-model","tags":["x_refsource_MISC","x_transferred","Product","web"]},{"url":"https://owasp.org/www-community/vulnerabilities/XML_External_Entity_(XXE)_Processing","tags":["x_refsource_MISC","x_transferred","Not Applicable","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-41034","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-wc9j-gc65-3cm7"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/41xxx/CVE-2023-41034.json","tags":["advisory"]},{"url":"https://github.com/eclipse-leshan/leshan","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2023-41034","title":"DDFFileParser in eclipse leshan is vulnerable to XXE Attacks","description":"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.  This issue has been fixed in versions 1.5.0 and 2.0.0-M13. Users are advised to upgrade. There are no known workarounds for this vulnerability.","status":"published","published":"2023-08-31T17:01:38.082Z","modified":"2024-09-27T14:17:15.256Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-611"],"updated_at":"2026-11-02T14:35:18.88314Z"}],"euvd":[{"id":"EUVD-2023-2373","description":"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.  This issue has been fixed in versions 1.5.0 and 2.0.0-M13. Users are advised to upgrade. There are no known workarounds for this vulnerability.","status":"published","published":"2023-08-31T17:01:38Z","modified":"2024-09-27T14:17:15Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","level":"medium"}],"updated_at":"2026-11-03T00:28:06.341022Z"}],"ghsa":[{"id":"GHSA-wc9j-gc65-3cm7","title":"DDFFileParser is vulnerable to XXE Attacks","description":"### Impact\n`DDFFileParser` and `DefaultDDFFileValidator` (and so `ObjectLoader`) are vulnerable to [XXE Attacks](https://owasp.org/www-community/vulnerabilities/XML_External_Entity_(XXE)_Processing).\n\n[DDF file](https://github.com/eclipse-leshan/leshan/wiki/Adding-new-objects#the-lwm2m-model) is a LWM2M format used to store LWM2M object description.   \nLeshan 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.\nIf you parse only trusted DDF file and validate only with trusted xml schema, upgrading is not mandatory. \n\n### Patches\nThis is fixed in **v1.5.0** and **2.0.0-M13**.\n\n### Workarounds\nNo easy way. Eventually writing your own `DDFFileParser`/`DefaultDDFFileValidator` (and so `ObjectLoader`) creating a `DocumentBuilderFactory` with : \n```java\n// For DDFFileParser\nDocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();\nfactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);\nfactory.setFeature(\"http://apache.org/xml/features/disallow-doctype-decl\", true); // Disable DTDs\nfactory.setXIncludeAware(false); // Disable XML Inclusions\nfactory.setExpandEntityReferences(false); // disable expand entity reference nodes\n\n// For DefaultDDFFileValidator\nSchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);\nfactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);\nfactory.setProperty(XMLConstants.ACCESS_EXTERNAL_DTD, \"\");\nfactory.setProperty(XMLConstants.ACCESS_EXTERNAL_SCHEMA, \"\");\n``` \n\n### References\n- https://owasp.org/www-community/vulnerabilities/XML_External_Entity_(XXE)_Processing\n- https://cheatsheetseries.owasp.org/cheatsheets/XML_External_Entity_Prevention_Cheat_Sheet.html\n- https://semgrep.dev/docs/cheat-sheets/java-xxe/\n- https://community.veracode.com/s/article/Java-Remediation-Guidance-for-XXE","status":"published","published":"2023-08-31T21:47:28Z","modified":"2023-11-08T05:00:55Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","level":"medium"}],"cwes":["CWE-611"],"updated_at":"2026-11-02T14:37:16.721714Z"}],"nvd":[{"id":"CVE-2023-41034","description":"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.  This issue has been fixed in versions 1.5.0 and 2.0.0-M13. Users are advised to upgrade. There are no known workarounds for this vulnerability.","status":"published","published":"2023-08-31T18:15:09.02Z","modified":"2026-06-17T06:20:12.45Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-611"],"updated_at":"2026-11-02T14:08:27.181588Z"}],"osv":[{"id":"CVE-2023-41034","title":"DDFFileParser in eclipse leshan is vulnerable to XXE Attacks","description":"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.  This issue has been fixed in versions 1.5.0 and 2.0.0-M13. Users are advised to upgrade. There are no known workarounds for this vulnerability.","status":"published","published":"2023-08-31T17:01:38.082Z","modified":"2026-10-28T10:36:22.112207752Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","level":"medium"}],"cwes":["CWE-611"],"updated_at":"2026-11-02T15:44:33.244128Z"},{"id":"GHSA-wc9j-gc65-3cm7","title":"DDFFileParser is vulnerable to XXE Attacks","description":"### Impact\n`DDFFileParser` and `DefaultDDFFileValidator` (and so `ObjectLoader`) are vulnerable to [XXE Attacks](https://owasp.org/www-community/vulnerabilities/XML_External_Entity_(XXE)_Processing).\n\n[DDF file](https://github.com/eclipse-leshan/leshan/wiki/Adding-new-objects#the-lwm2m-model) is a LWM2M format used to store LWM2M object description.   \nLeshan 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.\nIf you parse only trusted DDF file and validate only with trusted xml schema, upgrading is not mandatory. \n\n### Patches\nThis is fixed in **v1.5.0** and **2.0.0-M13**.\n\n### Workarounds\nNo easy way. Eventually writing your own `DDFFileParser`/`DefaultDDFFileValidator` (and so `ObjectLoader`) creating a `DocumentBuilderFactory` with : \n```java\n// For DDFFileParser\nDocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();\nfactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);\nfactory.setFeature(\"http://apache.org/xml/features/disallow-doctype-decl\", true); // Disable DTDs\nfactory.setXIncludeAware(false); // Disable XML Inclusions\nfactory.setExpandEntityReferences(false); // disable expand entity reference nodes\n\n// For DefaultDDFFileValidator\nSchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);\nfactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);\nfactory.setProperty(XMLConstants.ACCESS_EXTERNAL_DTD, \"\");\nfactory.setProperty(XMLConstants.ACCESS_EXTERNAL_SCHEMA, \"\");\n``` \n\n### References\n- https://owasp.org/www-community/vulnerabilities/XML_External_Entity_(XXE)_Processing\n- https://cheatsheetseries.owasp.org/cheatsheets/XML_External_Entity_Prevention_Cheat_Sheet.html\n- https://semgrep.dev/docs/cheat-sheets/java-xxe/\n- https://community.veracode.com/s/article/Java-Remediation-Guidance-for-XXE","status":"published","published":"2023-08-31T21:47:28Z","modified":"2026-09-10T03:49:57.793031373Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","level":"medium"}],"cwes":["CWE-611"],"updated_at":"2026-11-02T15:46:58.401149Z"}]}}