{"api_version":"1","generated_at":"2026-04-23T04:21:34+00:00","cve":"CVE-2022-41556","urls":{"html":"https://cve.report/CVE-2022-41556","api":"https://cve.report/api/cve/CVE-2022-41556.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2022-41556","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2022-41556"},"summary":{"title":"CVE-2022-41556","description":"A resource leak in gw_backend.c in lighttpd 1.4.56 through 1.4.66 could lead to a denial of service (connection-slot exhaustion) after a large amount of anomalous TCP behavior by clients. It is related to RDHUP mishandling in certain HTTP/1.1 chunked situations. Use of mod_fastcgi is, for example, affected. This is fixed in 1.4.67.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2022-10-06 18:17:00","updated_at":"2023-11-07 03:52:00"},"problem_types":["CWE-401"],"metrics":[],"references":[{"url":"https://security.gentoo.org/glsa/202210-12","name":"GLSA-202210-12","refsource":"GENTOO","tags":[],"title":"Lighttpd: Denial of Service (GLSA 202210-12) — Gentoo security","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://github.com/lighttpd/lighttpd1.4/compare/lighttpd-1.4.66...lighttpd-1.4.67","name":"https://github.com/lighttpd/lighttpd1.4/compare/lighttpd-1.4.66...lighttpd-1.4.67","refsource":"MISC","tags":[],"title":"Comparing lighttpd-1.4.66...lighttpd-1.4.67 · lighttpd/lighttpd1.4 · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OVOSBSCMLGCHH2Z74H64ZWVDFJFQTBC2/","name":"FEDORA-2022-c26b19568d","refsource":"FEDORA","tags":[],"title":"[SECURITY] Fedora 35 Update: lighttpd-1.4.67-1.fc35 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://git.lighttpd.net/lighttpd/lighttpd1.4/commit/b18de6f9264f914f7bf493abd3b6059343548e50","name":"https://git.lighttpd.net/lighttpd/lighttpd1.4/commit/b18de6f9264f914f7bf493abd3b6059343548e50","refsource":"MISC","tags":[],"title":"[core] handle RDHUP when collecting chunked body · b18de6f926 -  lighttpd1.4 - Gitea: git hosting on git.lighttpd.net","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://github.com/lighttpd/lighttpd1.4/pull/115","name":"https://github.com/lighttpd/lighttpd1.4/pull/115","refsource":"MISC","tags":[],"title":"[core] release connections in CLOSE_WAIT & CON_STATE_READ_POST state by gmd20 · Pull Request #115 · lighttpd/lighttpd1.4 · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OVOSBSCMLGCHH2Z74H64ZWVDFJFQTBC2/","name":"FEDORA-2022-c26b19568d","refsource":"","tags":[],"title":"[SECURITY] Fedora 35 Update: lighttpd-1.4.67-1.fc35 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2022-41556","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-41556","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2022","cve_id":"41556","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"35","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2022","cve_id":"41556","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"lighttpd","cpe5":"lighttpd","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2022-41556","qid":"181083","title":"Debian Security Update for lighttpd (DSA 5243-1)"},{"cve":"CVE-2022-41556","qid":"183019","title":"Debian Security Update for lighttpd (CVE-2022-41556)"},{"cve":"CVE-2022-41556","qid":"199198","title":"Ubuntu Security Notification for lighttpd Vulnerabilities (USN-5903-1)"},{"cve":"CVE-2022-41556","qid":"283176","title":"Fedora Security Update for lighttpd (FEDORA-2022-c26b19568d)"},{"cve":"CVE-2022-41556","qid":"502743","title":"Alpine Linux Security Update for lighttpd"},{"cve":"CVE-2022-41556","qid":"503685","title":"Alpine Linux Security Update for lighttpd"},{"cve":"CVE-2022-41556","qid":"710656","title":"Gentoo Linux Lighttpd Denial of Service Vulnerability (GLSA 202210-12)"}]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2022-41556","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"A resource leak in gw_backend.c in lighttpd 1.4.56 through 1.4.66 could lead to a denial of service (connection-slot exhaustion) after a large amount of anomalous TCP behavior by clients. It is related to RDHUP mishandling in certain HTTP/1.1 chunked situations. Use of mod_fastcgi is, for example, affected. This is fixed in 1.4.67."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"url":"https://git.lighttpd.net/lighttpd/lighttpd1.4/commit/b18de6f9264f914f7bf493abd3b6059343548e50","refsource":"MISC","name":"https://git.lighttpd.net/lighttpd/lighttpd1.4/commit/b18de6f9264f914f7bf493abd3b6059343548e50"},{"refsource":"MISC","name":"https://github.com/lighttpd/lighttpd1.4/pull/115","url":"https://github.com/lighttpd/lighttpd1.4/pull/115"},{"refsource":"MISC","name":"https://github.com/lighttpd/lighttpd1.4/compare/lighttpd-1.4.66...lighttpd-1.4.67","url":"https://github.com/lighttpd/lighttpd1.4/compare/lighttpd-1.4.66...lighttpd-1.4.67"},{"refsource":"FEDORA","name":"FEDORA-2022-c26b19568d","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OVOSBSCMLGCHH2Z74H64ZWVDFJFQTBC2/"},{"refsource":"GENTOO","name":"GLSA-202210-12","url":"https://security.gentoo.org/glsa/202210-12"}]}},"nvd":{"publishedDate":"2022-10-06 18:17:00","lastModifiedDate":"2023-11-07 03:52:00","problem_types":["CWE-401"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:lighttpd:lighttpd:*:*:*:*:*:*:*:*","versionStartIncluding":"1.4.56","versionEndExcluding":"1.4.67","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":null,"notes":[]}}}