-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 CVE-2018-1311: Apache Xerces-C use-after-free vulnerability processing external DTD Severity: High Vendor: The Apache Software Foundation Versions Affected: Apache Xerces-C XML Parser library (all known versions) Description: The Xerces-C XML parser contains a use-after-free error triggered during the scanning of external DTDs. The bug allows for a denial of service attack in applications that allow external DTD processing and do not prevent external DTD usage, and could conceivably result in remote code execution if the heap were groomed. Mitigation: This flaw has not been addressed in the maintained version of the library and has no current mitigation other than to disable DTD processing. This can be accomplished via the DOM using a standard parser feature, or via SAX using the XERCES_DISABLE_DTD environment variable. Applications should strongly consider blocking remote entity resolution and/or disabling of DTD processing in light of the continued identification of bugs in this area of the library. Credit: This issue was reported by the UK's National Cyber Security Centre (NCSC). References: http://xerces.apache.org/xerces-c/secadv/CVE-2018-1311.txt -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEE3KoVAHvtneaQzZUjN4uEVAIneWIFAl34DFIACgkQN4uEVAIn eWIbtQ/9Gv7gURR24J5yx+R69O4bnGsgHPaHea7VWh4bs4H/mYli3ewZBwzkuTz1 +Ib6RN8QXT9FA4+TVBCQua2/EBlpnpNMHPp6+GDWISrPYworJGV9FDrCDfqB+BR2 Li68pH/wlFgqCLMsdUSm7lKU9n+rflW8kx3AsqBlggcrfGTh7XJaImHelOXuRqw/ QumnckDQQkEgPHxGVE5h2uYvwj1HsyU/czqqWVAHC1rzdXI9syGGOO9xoNCjB70d rMi+XEDTuyzqY6SIjM1NLbFyX8cs9CDM4IhQeG+XNQUE9VnvLu1dHY/IqvS9jDrO HD4J0ID/rnbxSou3BTaMKGr/TkJHanniZhXJxZujDI7ksEbMBemB7ROwCcQLQ8Z8 B3QKfCQwjIGmBMaDafElyrbIp74+Vpq3eY6itFOGCQE7f+rXu3qxEk5njsdBsJYV s47v9f0v65O0FE5l7yPi3zhkonCfHaMTw08SboY2YqWJf9A1YJZOs1PF1SNU+D/p rM2ydwP5F9OPlwm/uLCfRd+hl2etM0UJBcL1V/tP0ORoEZUF1+ZEZckDQ9Cnr2eY 6Dgd+dmTk5nxjPmsQZPHb4QXsQHbq1HCU5/oJug56SatJ0H0ffj48XXjd1UlBEIk v5Eo3+ahPxXBuSgc77naLcisSy3H3+qL6VDMpq6qK1IC/PXvaz0= =zDeT -----END PGP SIGNATURE-----