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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "3F70BAA1-0550-43B4-A6AD-139CF8F37AD9", "versionEndExcluding": "2.4.64", "versionStartIncluding": "2.4.26", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In certain proxy configurations, a denial of service attack against\u00a0Apache HTTP Server versions 2.4.26 through to 2.4.63 can be triggered by untrusted clients causing an assertion in mod_proxy_http2.\n\nConfigurations affected are a reverse proxy is configured for an HTTP/2 backend, with ProxyPreserveHost set to \"on\"."}, {"lang": "es", "value": "En ciertas configuraciones de proxy, un ataque de denegaci\u00f3n de servicio contra Apache HTTP Server, versiones 2.4.26 a 2.4.63, puede ser provocado por clientes no confiables que generen una aserci\u00f3n en mod_proxy_http2. Las configuraciones afectadas son las que tienen un proxy inverso configurado para un backend HTTP/2, con ProxyPreserveHost activado."}], "id": "CVE-2025-49630", "lastModified": "2025-07-29T15:11:08.267", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2025-07-10T17:15:48.050", "references": [{"source": "security@apache.org", "tags": ["Vendor Advisory"], "url": "https://httpd.apache.org/security/vulnerabilities_24.html"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-617"}], "source": "security@apache.org", "type": "Secondary"}]}

{"bugzilla": {"description": "httpd: mod_proxy_http2: untrusted input from a client causes an assertion to fail in the Apache mod_proxy_http2 module", "id": "2374578", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2374578"}, "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:N/A:H", "status": "draft"}, "cwe": "CWE-617", "details": ["In certain proxy configurations, a denial of service attack against\u00a0Apache HTTP Server versions 2.4.26 through to 2.4.63 can be triggered by untrusted clients causing an assertion in mod_proxy_http2.\nConfigurations affected are a reverse proxy is configured for an HTTP/2 backend, with ProxyPreserveHost set to \"on\".", "An assertion failure flaw was found in Apache httpd. Untrusted clients can send inputs that trigger an assertion failure in the mod_proxy_http2 module, which likely results in an Apache HTTP server crash or denial of service (DoS)."], "mitigation": {"lang": "en:us", "value": "No mitigation is currently available that meets Red Hat Product Security\u2019s standards for usability, deployment, applicability, or stability."}, "name": "CVE-2025-49630", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "httpd:2.4/httpd", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:jboss_core_services:1", "fix_state": "Affected", "package_name": "httpd", "product_name": "Red Hat JBoss Core Services"}, {"cpe": "cpe:/a:redhat:jboss_core_services:1", "fix_state": "Affected", "package_name": "jbcs-httpd24-httpd", "product_name": "Red Hat JBoss Core Services"}], "public_date": "2025-07-14T07:22:15Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-49630\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-49630"], "statement": "The vulnerability only affects Appache httpd if a reverse proxy is configured for an HTTP/2 backend, with the ProxyPreserveHost set to \\\"on\\\".\nThis vulnerability is rated as Moderate because it requires a highly specific and non-default configuration to be exploitable\u2014namely, an Apache HTTP Server acting as a reverse proxy with an HTTP/2 backend and ProxyPreserveHost set to \"on\". The flaw results in an assertion failure in the mod_proxy_http2 module when handling specially crafted inputs from untrusted clients. While this can lead to a denial of service via server crash, the impact is limited to availability, with no risk of remote code execution or data leakage. Additionally, the condition is recoverable through a simple restart, and there is no persistent state corruption.", "threat_severity": "Moderate"}