It was discovered that Expat incorrectly handled certain XML files. An attacker could possibly use this issue to cause a denial of service.
{ "availability": "No subscription required", "binaries": [ { "libexpat1-dev": "2.1.0-7ubuntu0.16.04.4", "expat-dbgsym": "2.1.0-7ubuntu0.16.04.4", "lib64expat1-dev": "2.1.0-7ubuntu0.16.04.4", "libexpat1": "2.1.0-7ubuntu0.16.04.4", "libexpat1-dbgsym": "2.1.0-7ubuntu0.16.04.4", "libexpat1-udeb": "2.1.0-7ubuntu0.16.04.4", "expat": "2.1.0-7ubuntu0.16.04.4", "libexpat1-udeb-dbgsym": "2.1.0-7ubuntu0.16.04.4", "lib64expat1": "2.1.0-7ubuntu0.16.04.4", "lib64expat1-dbgsym": "2.1.0-7ubuntu0.16.04.4" } ] }