{"id":"USN-4784-1","summary":"xerces-c vulnerabilities","details":"It was discovered that Xerces-C++ XML Parser mishandles certain kinds of\nexternal DTD references, resulting in a user-after-free. An attacker could\nuse this vulnerability to cause a denial of service (crash) or possibly\nexecute arbitrary code. This issue affected only Ubuntu 16.04 ESM.\n(CVE-2016-2099)\n\nIt was discovered that Xerces-C++ XML Parser fails to successfully parse a\nDTD that is too deeply nested. An unauthenticated attacker could use this\nvulnerability to cause a denial of service. This issue affected only Ubuntu\n16.04 ESM. (CVE-2016-4463)\n\nIt was discovered that Xerces-C++ mishandles certain kinds of external DTD\nreferences, resulting in dereference of a NULL pointer. An attacker could\nuse this vulnerability to cause a denial of service. (CVE-2017-12627)","modified":"2026-04-22T10:11:30.872703Z","published":"2021-03-15T21:00:57Z","related":["UBUNTU-CVE-2016-2099","UBUNTU-CVE-2016-4463","UBUNTU-CVE-2017-12627"],"upstream":["CVE-2016-2099","CVE-2016-4463","CVE-2017-12627","UBUNTU-CVE-2016-2099","UBUNTU-CVE-2016-4463","UBUNTU-CVE-2017-12627"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4784-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-2099"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-4463"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2017-12627"}],"affected":[{"package":{"name":"xerces-c","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/xerces-c@3.1.3+debian-1ubuntu0.1~esm1?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.3+debian-1ubuntu0.1~esm1"}]}],"versions":["3.1.1-5.1","3.1.2+debian-1","3.1.3+debian-1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"libxerces-c-samples","binary_version":"3.1.3+debian-1ubuntu0.1~esm1"},{"binary_name":"libxerces-c3.1","binary_version":"3.1.3+debian-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4784-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:16.04:LTS","cves":[{"id":"CVE-2016-2099","severity":[{"score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2016-4463","severity":[{"score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2017-12627","severity":[{"score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}]}}},{"package":{"name":"xerces-c","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/xerces-c@3.2.0+debian-2ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.0+debian-2ubuntu0.1~esm1"}]}],"versions":["3.1.4+debian-2","3.1.4+debian-2build1","3.2.0+debian-2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"libxerces-c-samples","binary_version":"3.2.0+debian-2ubuntu0.1~esm1"},{"binary_name":"libxerces-c3.2","binary_version":"3.2.0+debian-2ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4784-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:18.04:LTS","cves":[{"id":"CVE-2017-12627","severity":[{"score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}]}}}],"schema_version":"1.7.5"}