{"schemaVersion":3,"id":"GHSA-PCX7-8HXG-J823","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Duplicate Advisory: Keycloak proxy header handling Denial-of-Service (DoS) vulnerability\n\n## Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-jgwc-jh89-rpgq. This link is maintained to preserve external references.\n\n## Original Description\nA vulnerability was found in the Keycloak Server. The Keycloak Server is vulnerable to a denial of service (DoS) attack due to improper handling of proxy headers. When Keycloak is configured to accept incoming proxy headers, it may accept non-IP values, such as obfuscated identifiers, without proper validation. This issue can lead to costly DNS resolution operations, which an attacker could exploit to tie up IO threads and potentially cause a denial of service.\nThe attacker must have access to send requests to a Keycloak instance that is configured to accept proxy headers, specifically when reverse proxies do not overwrite incoming headers, and Keycloak is configured to trust these headers.","dates":{"published":"2024-11-25T09:30:59.000Z","modified":"2024-12-06T05:29:49.151Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":4.7,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"OSV · Maven","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","computed":true,"selection":"version-preference"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"OSV · Maven","score":4.7,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","exploitability":2.6,"impact":6,"computed":true}]},"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":"org.keycloak","product":"keycloak-quarkus-server","name":"org.keycloak:keycloak-quarkus-server","label":"keycloak-quarkus-server","ecosystem":"Maven","cpePart":null,"purl":"pkg:maven/org.keycloak/keycloak-quarkus-server","purlType":"maven","versions":[{"text":"< 24.0.9","noFixRecorded":false,"fixedIn":null},{"text":"≥ 25.0.0, < 26.0.6","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 24.0.9 | ≥ 25.0.0, < 26.0.6","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-9666","label":"nvd.nist.gov/vuln/detail/CVE-2024-9666","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2024:10175","label":"access.redhat.com/errata/RHSA-2024:10175","hostname":"access.redhat.com","tags":["WEB"]},{"url":"https://access.redhat.com/errata/RHSA-2024:10176","label":"access.redhat.com/errata/RHSA-2024:10176","hostname":"access.redhat.com","tags":["WEB"]},{"url":"https://access.redhat.com/errata/RHSA-2024:10177","label":"access.redhat.com/errata/RHSA-2024:10177","hostname":"access.redhat.com","tags":["WEB"]},{"url":"https://access.redhat.com/errata/RHSA-2024:10178","label":"access.redhat.com/errata/RHSA-2024:10178","hostname":"access.redhat.com","tags":["WEB"]},{"url":"https://access.redhat.com/security/cve/CVE-2024-9666","label":"access.redhat.com/security/cve/CVE-2024-9666","hostname":"access.redhat.com","tags":["WEB"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2317440","label":"bugzilla.redhat.com/show_bug.cgi?id=2317440","hostname":"bugzilla.redhat.com","tags":["WEB"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2024-11-25T09:30:59.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-12-06T05:29:49.151Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":19,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T19:15:00.066Z","stale":false,"partial":false}}