{"schemaVersion":3,"id":"USN-6885-2","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"apache2 regression\n\nUSN-6885-1 fixed vulnerabilities in Apache HTTP Server. One of the security\nfixes introduced a regression when proxying requests to a HTTP/2 server.\nThis update fixes the problem.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n Marc Stern discovered that the Apache HTTP Server incorrectly handled\n serving WebSocket protocol upgrades over HTTP/2 connections. A remote\n attacker could possibly use this issue to cause the server to crash,\n resulting in a denial of service. (CVE-2024-36387)\n\n Orange Tsai discovered that the Apache HTTP Server mod_proxy module\n incorrectly sent certain request URLs with incorrect encodings to backends.\n A remote attacker could possibly use this issue to bypass authentication.\n (CVE-2024-38473)\n\n Orange Tsai discovered that the Apache HTTP Server mod_rewrite module\n incorrectly handled certain substitutions. A remote attacker could possibly\n use this issue to execute scripts in directories not directly reachable\n by any URL, or cause a denial of service. Some environments may require\n using the new UnsafeAllow3F flag to handle unsafe substitutions.\n (CVE-2024-38474, CVE-2024-38475, CVE-2024-39573)\n\n Orange Tsai discovered that the Apache HTTP Server incorrectly handled\n certain response headers. A remote attacker could possibly use this issue\n to obtain sensitive information, execute local scripts, or perform SSRF\n attacks. (CVE-2024-38476)\n\n Orange Tsai discovered that the Apache HTTP Server mod_proxy module\n incorrectly handled certain requests. A remote attacker could possibly use\n this issue to cause the server to crash, resulting in a denial of service.\n (CVE-2024-38477)\n\n It was discovered that the Apache HTTP Server incorrectly handled certain\n handlers configured via AddType. A remote attacker could possibly use this\n issue to obtain source code. (CVE-2024-39884)","dates":{"published":"2024-07-11T17:25:58.000Z","modified":"2026-04-22T10:49:16.648Z","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":"< 2.4.41-4ubuntu3.20","noFixRecorded":false,"fixedIn":null},{"text":"< 2.4.52-1ubuntu4.11","noFixRecorded":false,"fixedIn":null},{"text":"< 2.4.58-1ubuntu8.3","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.4.41-4ubuntu3.20 | < 2.4.52-1ubuntu4.11 | < 2.4.58-1ubuntu8.3","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-6885-2","label":"ubuntu.com/security/notices/USN-6885-2","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://launchpad.net/bugs/2072648","label":"launchpad.net/bugs/2072648","hostname":"launchpad.net","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CVE-2024-38476"]},"timeline":[{"kind":"published","date":"2024-07-11T17:25:58.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-22T10:49:16.648Z","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":"2026-10-19T04:04:08.242Z","stale":false,"partial":false}}