{"schemaVersion":3,"id":"USN-4784-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"xerces-c vulnerabilities\n\nIt 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)","dates":{"published":"2021-03-15T21:00:57.000Z","modified":"2026-06-25T13:30:25.118Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"ubuntu","product":"xerces-c","name":"xerces-c","label":"xerces-c","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/xerces-c","purlType":"deb","versions":[{"text":"< 3.1.3+debian-1ubuntu0.1~esm1","noFixRecorded":false,"fixedIn":null},{"text":"< 3.2.0+debian-2ubuntu0.1~esm1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.1.3+debian-1ubuntu0.1~esm1 | < 3.2.0+debian-2ubuntu0.1~esm1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-4784-1","label":"ubuntu.com/security/notices/USN-4784-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2016-2099","label":"ubuntu.com/security/CVE-2016-2099","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2016-4463","label":"ubuntu.com/security/CVE-2016-4463","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2017-12627","label":"ubuntu.com/security/CVE-2017-12627","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2016-2099","CVE-2016-4463","CVE-2017-12627"],"downstream":[],"duplicates":[],"related":["CVE-2016-2099","CVE-2016-4463","CVE-2017-12627"]},"timeline":[{"kind":"published","date":"2021-03-15T21:00:57.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-25T13:30:25.118Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T09:35:05.216Z","stale":false,"partial":false}}