CVE-2025-61729

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{"affected": [{"affectedData": [{"collectionURL": "https://pkg.go.dev", "defaultStatus": "unaffected", "packageName": "crypto/x509", "product": "crypto/x509", "programRoutines": [{"name": "Certificate.VerifyHostname"}, {"name": "Certificate.Verify"}], "vendor": "Go standard library", "versions": [{"lessThan": "1.24.11", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThan": "1.25.5", "status": "affected", "version": "1.25.0", "versionType": "semver"}]}], "source": "security@golang.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*", "matchCriteriaId": "F2E6FD2A-A487-4099-B91D-2429F286AC6D", "versionEndExcluding": "1.24.11", "vulnerable": true}, {"criteria": "cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*", "matchCriteriaId": "39C03A37-B94B-46E4-B1C2-A70A870F8E53", "versionEndExcluding": "1.25.5", "versionStartIncluding": "1.25.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Within HostnameError.Error(), when constructing an error string, there is no limit to the number of hosts that will be printed out. Furthermore, the error string is constructed by repeated string concatenation, leading to quadratic runtime. Therefore, a certificate provided by a malicious actor can result in excessive resource consumption."}, {"lang": "es", "value": "Dentro de HostnameError.Error(), al construir una cadena de error, no hay l\u00edmite en el n\u00famero de hosts que se imprimir\u00e1n. Adem\u00e1s, la cadena de error se construye mediante la concatenaci\u00f3n repetida de cadenas, lo que lleva a un tiempo de ejecuci\u00f3n cuadr\u00e1tico. Por lo tanto, un certificado proporcionado por un actor malicioso puede resultar en un consumo excesivo de recursos."}], "id": "CVE-2025-61729", "lastModified": "2026-10-18T18:10:00.100", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-61729", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-12-02T21:52:36.341575Z", "version": "2.0.3"}}]}, "published": "2025-12-02T19:15:51.447", "references": [{"source": "security@golang.org", "tags": ["Patch"], "url": "https://go.dev/cl/725920"}, {"source": "security@golang.org", "tags": ["Issue Tracking", "Patch"], "url": "https://go.dev/issue/76445"}, {"source": "security@golang.org", "tags": ["Mailing List", "Release Notes"], "url": "https://groups.google.com/g/golang-announce/c/8FJoBkPddm4"}, {"source": "security@golang.org", "tags": ["Vendor Advisory"], "url": "https://pkg.go.dev/vuln/GO-2025-4155"}], "sourceIdentifier": "security@golang.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-295"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "crypto/x509: Excessive resource consumption when printing error string for host certificate validation in crypto/x509", "id": "2418462", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2418462"}, "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-1050", "details": ["Within HostnameError.Error(), when constructing an error string, there is no limit to the number of hosts that will be printed out. Furthermore, the error string is constructed by repeated string concatenation, leading to quadratic runtime. Therefore, a certificate provided by a malicious actor can result in excessive resource consumption."], "name": "CVE-2025-61729", "public_date": "2025-12-02T18:54:10Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-61729\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-61729\nhttps://go.dev/cl/725920\nhttps://go.dev/issue/76445\nhttps://groups.google.com/g/golang-announce/c/8FJoBkPddm4\nhttps://pkg.go.dev/vuln/GO-2025-4155"], "threat_severity": "Important"}

{"created": "2025-12-03T12:14:36.606110+00:00", "updated": "2025-12-03T12:14:36.606139+00:00", "vendors": ["go_standard_library", "go_standard_library$PRODUCT$crypto_tls"]}