{"schemaVersion":3,"id":"USN-4772-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"vnc4 vulnerabilities\n\n\nUSN-2500-1 addressed CVE-2015-0255 for xorg-server. This update provides\nthe corresponding fix for VNC4 on Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.\n(CVE-2015-0255)\n\nUSN-2726-1 addressed CVE-2015-1283 for Expat. This update provides the\ncorresponding fix for VNC4 on Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.\n(CVE-2015-1283)\n\nOriginal advisory details:\n\n Olivier Fourdan discovered that the X.Org X server incorrectly handled\n XkbSetGeometry requests resulting in an information leak. An attacker able\n to connect to an X server, either locally or remotely, could use this issue\n to possibly obtain sensitive information. (CVE-2015-0255)\n\n It was discovered that Expat incorrectly handled malformed XML data. If a\n user or application linked against Expat were tricked into opening a\n crafted XML file, an attacker could cause a denial of service, or possibly\n execute arbitrary code. (CVE-2015-1283)","dates":{"published":"2021-03-15T20:16:26.000Z","modified":"2026-06-29T13:48:13.615Z","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":"vnc4","name":"vnc4","label":"vnc4","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/vnc4","purlType":"deb","versions":[{"text":"< 4.1.1+xorg4.3.0-37ubuntu5.0.2+esm1","noFixRecorded":false,"fixedIn":null},{"text":"< 4.1.1+xorg4.3.0-37.3ubuntu2.1+esm1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.1.1+xorg4.3.0-37ubuntu5.0.2+esm1 | < 4.1.1+xorg4.3.0-37.3ubuntu2.1+esm1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-4772-1","label":"ubuntu.com/security/notices/USN-4772-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2015-0255","label":"ubuntu.com/security/CVE-2015-0255","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2015-1283","label":"ubuntu.com/security/CVE-2015-1283","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2015-0255","CVE-2015-1283"],"downstream":[],"duplicates":[],"related":["CVE-2015-0255","CVE-2015-1283"]},"timeline":[{"kind":"published","date":"2021-03-15T20:16:26.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-29T13:48:13.615Z","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":"2026-10-20T13:12:23.857Z","stale":false,"partial":false}}