CVE-2023-40225

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*", "matchCriteriaId": "023D059D-3A23-4CD9-85DF-119A32FB24B2", "versionEndIncluding": "2.0.32", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*", "matchCriteriaId": "26AB82A2-31F2-4ECA-838A-9A94520B5AEE", "versionEndIncluding": "2.2.30", "versionStartIncluding": "2.2.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*", "matchCriteriaId": "B3F72E80-3A75-46BA-BC3A-40D87B7BFAF4", "versionEndIncluding": "2.4.23", "versionStartIncluding": "2.4.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*", "matchCriteriaId": "11561968-E0DC-4BFD-930F-52F96B4A4BBD", "versionEndExcluding": "2.6.15", "versionStartIncluding": "2.5.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*", "matchCriteriaId": "855FF6D8-8F0E-4402-AF4D-9810A5080E72", "versionEndExcluding": "2.7.10", "versionStartIncluding": "2.7.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*", "matchCriteriaId": "8D4FC3EF-9132-46E7-A43B-9074EC0C2EC1", "versionEndExcluding": "2.8.2", "versionStartIncluding": "2.8.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "HAProxy through 2.0.32, 2.1.x and 2.2.x through 2.2.30, 2.3.x and 2.4.x through 2.4.23, 2.5.x and 2.6.x before 2.6.15, 2.7.x before 2.7.10, and 2.8.x before 2.8.2 forwards empty Content-Length headers, violating RFC 9110 section 8.6. In uncommon cases, an HTTP/1 server behind HAProxy may interpret the payload as an extra request."}], "id": "CVE-2023-40225", "lastModified": "2026-06-17T06:16:49.587", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.2, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-40225", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-10-09T20:14:21.494530Z", "version": "2.0.3"}}]}, "published": "2023-08-10T21:15:10.743", "references": [{"source": "cve@mitre.org", "tags": ["Technical Description"], "url": "https://cwe.mitre.org/data/definitions/436.html"}, {"source": "cve@mitre.org", "tags": ["Patch"], "url": "https://github.com/haproxy/haproxy/commit/6492f1f29d738457ea9f382aca54537f35f9d856"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"], "url": "https://github.com/haproxy/haproxy/issues/2237"}, {"source": "cve@mitre.org", "tags": ["Release Notes"], "url": "https://www.haproxy.org/download/2.6/src/CHANGELOG"}, {"source": "cve@mitre.org", "tags": ["Release Notes"], "url": "https://www.haproxy.org/download/2.7/src/CHANGELOG"}, {"source": "cve@mitre.org", "tags": ["Release Notes"], "url": "https://www.haproxy.org/download/2.8/src/CHANGELOG"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Technical Description"], "url": "https://cwe.mitre.org/data/definitions/436.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://github.com/haproxy/haproxy/commit/6492f1f29d738457ea9f382aca54537f35f9d856"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"], "url": "https://github.com/haproxy/haproxy/issues/2237"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes"], "url": "https://www.haproxy.org/download/2.6/src/CHANGELOG"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes"], "url": "https://www.haproxy.org/download/2.7/src/CHANGELOG"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes"], "url": "https://www.haproxy.org/download/2.8/src/CHANGELOG"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-444"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:1142", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "haproxy-0:2.4.22-3.el9_3", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-03-05T00:00:00Z"}, {"advisory": "RHSA-2024:1089", "cpe": "cpe:/a:redhat:rhel_eus:9.2", "package": "haproxy-0:2.4.17-6.el9_2.2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-03-05T00:00:00Z"}, {"advisory": "RHSA-2024:0308", "cpe": "cpe:/a:redhat:openshift:4.11::el8", "package": "haproxy-0:2.2.24-4.rhaos4.11.el8", "product_name": "Red Hat OpenShift Container Platform 4.11", "release_date": "2024-01-25T00:00:00Z"}, {"advisory": "RHSA-2024:0200", "cpe": "cpe:/a:redhat:openshift:4.12::el8", "package": "haproxy-0:2.2.24-4.rhaos4.12.el8", "product_name": "Red Hat OpenShift Container Platform 4.12", "release_date": "2024-01-17T00:00:00Z"}, {"advisory": "RHSA-2023:7606", "cpe": "cpe:/a:redhat:openshift:4.13::el8", "package": "haproxy-0:2.2.24-4.rhaos4.13.el8", "product_name": "Red Hat OpenShift Container Platform 4.13", "release_date": "2023-12-06T00:00:00Z"}, {"advisory": "RHSA-2023:7473", "cpe": "cpe:/a:redhat:openshift:4.14::el8", "package": "haproxy-0:2.6.13-2.rhaos4.14.el8", "product_name": "Red Hat OpenShift Container Platform 4.14", "release_date": "2023-11-29T00:00:00Z"}], "bugzilla": {"description": "haproxy: Proxy forwards malformed empty Content-Length headers", "id": "2231370", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2231370"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "status": "verified"}, "cwe": "CWE-20", "details": ["HAProxy through 2.0.32, 2.1.x and 2.2.x through 2.2.30, 2.3.x and 2.4.x through 2.4.23, 2.5.x and 2.6.x before 2.6.15, 2.7.x before 2.7.10, and 2.8.x before 2.8.2 forwards empty Content-Length headers, violating RFC 9110 section 8.6. In uncommon cases, an HTTP/1 server behind HAProxy may interpret the payload as an extra request.", "A flaw was found in HAProxy. Empty Content-Length headers are forwarded, which could cause an HTTP/1 server behind it to interpret the payload as an extra request. This may render the HTTP/1 server vulnerable to attacks in some uncommon cases."], "mitigation": {"lang": "en:us", "value": "This flaw can be mitigated by applying a rule to explicitly reject any requests with an empty Content-Lenght header. The following line can be added to any frontend configurations at the /etc/haproxy/haproxy.cfg file. \n~~~\nhttp-request deny if { hdr_len(content-length) 0 }\n~~~"}, "name": "CVE-2023-40225", "package_state": [{"cpe": "cpe:/a:redhat:cryostat:2", "fix_state": "Not affected", "package_name": "haproxy", "product_name": "Cryostat 2"}, {"cpe": "cpe:/a:redhat:ceph_storage:5", "fix_state": "Affected", "package_name": "haproxy", "product_name": "Red Hat Ceph Storage 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "haproxy", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "haproxy", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "haproxy", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:openshift:3.11", "fix_state": "Out of support scope", "package_name": "haproxy", "product_name": "Red Hat OpenShift Container Platform 3.11"}, {"cpe": "cpe:/a:redhat:rhel_software_collections:3", "fix_state": "Will not fix", "package_name": "rh-haproxy18-haproxy", "product_name": "Red Hat Software Collections"}], "public_date": "2023-08-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-40225\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-40225"], "threat_severity": "Moderate"}

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