{"schemaVersion":3,"id":"USN-5090-2","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"apache2 vulnerabilities\n\nUSN-5090-1 fixed several vulnerabilities in Apache. This update provides\nthe corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.\n\nOriginal advisory details:\n\n It was discovered that the Apache HTTP Server incorrectly handled certain\n malformed requests. A remote attacker could possibly use this issue to\n cause the server to crash, resulting in a denial of service.\n (CVE-2021-34798)\n\n It was discovered that the Apache HTTP Server incorrectly handled escaping\n quotes. If the server was configured with third-party modules, a remote\n attacker could use this issue to cause the server to crash, resulting in a\n denial of service, or possibly execute arbitrary code. (CVE-2021-39275)\n\n It was discovered that the Apache mod_proxy module incorrectly handled\n certain request uri-paths. A remote attacker could possibly use this issue\n to cause the server to forward requests to arbitrary origin servers.\n (CVE-2021-40438)","dates":{"published":"2021-09-27T16:46:11.000Z","modified":"2026-06-29T13:49:33.710Z","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":"apache2","name":"apache2","label":"apache2","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/apache2","purlType":"deb","versions":[{"text":"< 2.4.7-1ubuntu4.22+esm2","noFixRecorded":false,"fixedIn":null},{"text":"< 2.4.18-2ubuntu3.17+esm2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.4.7-1ubuntu4.22+esm2 | < 2.4.18-2ubuntu3.17+esm2","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-5090-2","label":"ubuntu.com/security/notices/USN-5090-2","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-34798","label":"ubuntu.com/security/CVE-2021-34798","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-39275","label":"ubuntu.com/security/CVE-2021-39275","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-40438","label":"ubuntu.com/security/CVE-2021-40438","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2021-34798","CVE-2021-39275","CVE-2021-40438"],"downstream":[],"duplicates":[],"related":["CVE-2021-34798","CVE-2021-39275","CVE-2021-40438"]},"timeline":[{"kind":"published","date":"2021-09-27T16:46:11.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-29T13:49:33.710Z","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":"2026-10-19T05:25:24.332Z","stale":false,"partial":false}}