{"schemaVersion":3,"id":"CVE-2018-18820","aliases":["ALPINE-CVE-2018-18820","MGASA-2018-0472","UBUNTU-CVE-2018-18820","DEBIAN-CVE-2018-18820","DLA-1588-1","DSA-4333-1"],"status":"published","duplicateOf":null,"title":null,"description":"A buffer overflow was discovered in the URL-authentication backend of the Icecast before 2.4.4. If the backend is enabled, then any malicious HTTP client can send a request for that specific resource including a crafted header, leading to denial of service and potentially remote code execution.","dates":{"published":"2018-11-05T19:00:00.000Z","modified":"2024-08-05T11:23:08.435Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.1,"severity":"high","version":"3.0","versionLabel":"v3.0","source":"NVD","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.0","versionLabel":"v3.0","source":"NVD","score":8.1,"severity":"high","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":6.8,"severity":"medium","vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","exploitability":null,"impact":null,"computed":false},{"version":"3.0","versionLabel":"v3.0","source":"OSV · Alpine","score":8.1,"severity":"high","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":5.6,"impact":9.8,"computed":true},{"version":"3.0","versionLabel":"v3.0","source":"OSV · Ubuntu","score":8.1,"severity":"high","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":5.6,"impact":9.8,"computed":true},{"version":"3.0","versionLabel":"v3.0","source":"OSV · Debian","score":8.1,"severity":"high","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":5.6,"impact":9.8,"computed":true}]},"epss":{"probability":0.48944,"percentile":0.98879,"severity":"high","asOf":"2026-10-22T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-22T00:00:00.000Z","baselineScore":0.48944},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.41909,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.48944,"percentile":0.98879}],"last30":[{"date":"2026-09-22T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.48944,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.48944,"percentile":0.98879}]},"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":[{"id":"CWE-119","name":"Improper Restriction of Operations within the Bounds of a Memory Buffer","description":"The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.","type":"weakness","status":"Stable","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/119.html"}],"affected":[{"vendor":"alpine","product":"icecast","name":"icecast","label":"icecast","ecosystem":"Alpine Linux","cpePart":null,"purl":"pkg:apk/alpine/icecast","purlType":"apk","versions":[{"text":"< 2.4.4-r0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.4.4-r0","eol":null,"hubHref":null},{"vendor":"debian","product":"icecast2","name":"icecast2","label":"icecast2","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/icecast2","purlType":"deb","versions":[{"text":"< 2.4.2-1+deb9u1","noFixRecorded":false,"fixedIn":null},{"text":"< 2.4.0-1.1+deb8u2","noFixRecorded":false,"fixedIn":null},{"text":"< 2.4.4-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.4.2-1+deb9u1 | < 2.4.0-1.1+deb8u2 | < 2.4.4-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"icecast2","name":"icecast2","label":"icecast2","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/icecast2","purlType":"deb","versions":[{"text":"< 2.4.2-1ubuntu0.1","noFixRecorded":false,"fixedIn":null},{"text":"< 2.4.3-2ubuntu0.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.4.2-1ubuntu0.1 | < 2.4.3-2ubuntu0.1","eol":null,"hubHref":null},{"vendor":"debian","product":"debian_linux","name":"debian linux","label":"debian_linux","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"8.0","noFixRecorded":false,"fixedIn":null},{"text":"9.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"8.0 | 9.0","eol":{"isEol":true,"eolDate":"2020-06-30T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"8","label":"8 (Jessie)","eolFrom":"2020-06-30T00:00:00.000Z","isLts":false,"isMaintained":false,"latestVersion":"8.11"},"product":{"name":"debian","label":"Debian","category":"os"}},"hubHref":"/vendor/debian/debian_linux"},{"vendor":"mageia","product":"icecast","name":"icecast","label":"icecast","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/icecast","purlType":"rpm","versions":[{"text":"< 2.4.4-1.mga6","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.4.4-1.mga6","eol":null,"hubHref":null},{"vendor":"xiph","product":"icecast","name":"icecast","label":"icecast","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 2.4.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.4.4","eol":null,"hubHref":"/vendor/xiph/icecast"}],"affectedCount":6,"eol":{"hasEol":true,"count":1},"references":[{"url":"http://www.securitytracker.com/id/1042019","label":"www.securitytracker.com/id/1042019","hostname":"www.securitytracker.com","tags":["VDB Entry","X Refsource SECTRACK","Third Party Advisory"]},{"url":"https://security.gentoo.org/glsa/201811-09","label":"security.gentoo.org/glsa/201811-09","hostname":"security.gentoo.org","tags":["Vendor Advisory","X Refsource GENTOO","Mitigation","Third Party Advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2018/11/msg00033.html","label":"lists.debian.org/debian-lts-announce/2018/11/msg00033.html","hostname":"lists.debian.org","tags":["Mailing List","X Refsource MLIST","Third Party Advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2018/11/01/3","label":"www.openwall.com/lists/oss-security/2018/11/01/3","hostname":"www.openwall.com","tags":["Mailing List","X Refsource MLIST","Patch","Third Party Advisory"]},{"url":"https://www.debian.org/security/2018/dsa-4333","label":"www.debian.org/security/2018/dsa-4333","hostname":"www.debian.org","tags":["Vendor Advisory","X Refsource DEBIAN","Third Party Advisory"]},{"url":"https://security.alpinelinux.org/vuln/CVE-2018-18820","label":"security.alpinelinux.org/vuln/CVE-2018-18820","hostname":"security.alpinelinux.org","tags":["Advisory"]},{"url":"https://advisories.mageia.org/MGASA-2018-0472.html","label":"advisories.mageia.org/MGASA-2018-0472.html","hostname":"advisories.mageia.org","tags":["Advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=23798","label":"bugs.mageia.org/show_bug.cgi?id=23798","hostname":"bugs.mageia.org","tags":["REPORT"]},{"url":"https://www.openwall.com/lists/oss-security/2018/11/01/3","label":"www.openwall.com/lists/oss-security/2018/11/01/3","hostname":"www.openwall.com","tags":["WEB","REPORT"]},{"url":"https://ubuntu.com/security/CVE-2018-18820","label":"ubuntu.com/security/CVE-2018-18820","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://gitlab.xiph.org/xiph/icecast-server/issues/2342","label":"gitlab.xiph.org/xiph/icecast-server/issues/2342","hostname":"gitlab.xiph.org","tags":["REPORT"]},{"url":"https://lgtm.com/blog/icecast_snprintf_CVE-2018-18820","label":"lgtm.com/blog/icecast_snprintf_CVE-2018-18820","hostname":"lgtm.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-18820","label":"www.cve.org/CVERecord?id=CVE-2018-18820","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2018-18820","label":"security-tracker.debian.org/tracker/CVE-2018-18820","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2024:10584-1"],"duplicates":[],"related":["OPENSUSE-SU-2024:10584-1"]},"timeline":[{"kind":"published","date":"2018-11-05T19:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-05T11:23:08.435Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":42,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T16:28:47.756Z","stale":false,"partial":false}}