CVE-2025-11936

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-11936", "assignerOrgId": "50d2cd11-d01a-48ed-9441-5bfce9d63b27", "state": "PUBLISHED", "assignerShortName": "wolfSSL", "dateReserved": "2025-10-17T22:28:29.097Z", "datePublished": "2025-11-21T22:24:27.443Z", "dateUpdated": "2025-12-08T15:50:46.421Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://www.wolfssl.com/download/", "defaultStatus": "unaffected", "modules": ["wolfSSL"], "packageName": "wolfSSL", "platforms": ["Linux", "MacOS"], "product": "wolfSSL", "programFiles": ["src/tls.c"], "repo": "https://github.com/wolfSSL/wolfssl", "vendor": "wolfSSL", "versions": [{"lessThan": "5.8.4", "status": "affected", "version": "3.12.0", "versionType": "git"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Jaehun Lee, Pohang University of Science and Technology (POSTECH)"}, {"lang": "en", "type": "coordinator", "value": "Kyungmin Bae, Pohang University of Science and Technology (POSTECH)"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Improper input validation in the TLS 1.3 KeyShareEntry parsing in wolfSSL v5.8.2 on multiple platforms allows a remote unauthenticated attacker to cause a denial-of-service by sending a crafted ClientHello message containing duplicate KeyShareEntry values for the same supported group, leading to excessive CPU and memory consumption during ClientHello processing.</p><br>"}], "value": "Improper input validation in the TLS 1.3 KeyShareEntry parsing in wolfSSL v5.8.2 on multiple platforms allows a remote unauthenticated attacker to cause a denial-of-service by sending a crafted ClientHello message containing duplicate KeyShareEntry values for the same supported group, leading to excessive CPU and memory consumption during ClientHello processing."}], "impacts": [{"capecId": "CAPEC-217", "descriptions": [{"lang": "en", "value": "CAPEC-217 Exploiting Incorrectly Configured SSL/TLS"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "baseScore": 6.3, "baseSeverity": "MEDIUM", "exploitMaturity": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-20", "description": "CWE-20 Improper Input Validation", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "50d2cd11-d01a-48ed-9441-5bfce9d63b27", "shortName": "wolfSSL", "dateUpdated": "2025-12-08T15:50:46.421Z"}, "references": [{"url": "https://github.com/wolfSSL/wolfssl"}, {"url": "https://github.com/wolfSSL/wolfssl/pull/9117"}], "source": {"discovery": "UNKNOWN"}, "title": "Potential DoS Vulnerability through Multiple KeyShareEntry with Same Group in TLS 1.3 ClientHello", "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"references": [{"url": "https://github.com/wolfSSL/wolfssl/pull/9117", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2025-11-24T16:19:13.484463Z", "id": "CVE-2025-11936", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-11-24T17:59:03.202Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-11936", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-11-24T16:19:13.484463Z"}}}], "references": [{"url": "https://github.com/wolfSSL/wolfssl/pull/9117", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-11-24T16:19:54.793Z"}}], "cna": {"title": "Potential DoS Vulnerability through Multiple KeyShareEntry with Same Group in TLS 1.3 ClientHello", "source": {"discovery": "UNKNOWN"}, "credits": [{"lang": "en", "type": "finder", "value": "Jaehun Lee, Pohang University of Science and Technology (POSTECH)"}, {"lang": "en", "type": "coordinator", "value": "Kyungmin Bae, Pohang University of Science and Technology (POSTECH)"}], "impacts": [{"capecId": "CAPEC-217", "descriptions": [{"lang": "en", "value": "CAPEC-217 Exploiting Incorrectly Configured SSL/TLS"}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 6.3, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subAvailabilityImpact": "LOW", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"repo": "https://github.com/wolfSSL/wolfssl", "vendor": "wolfSSL", "modules": ["wolfSSL"], "product": "wolfSSL", "versions": [{"status": "affected", "version": "3.12.0", "lessThan": "5.8.4", "versionType": "git"}], "platforms": ["Linux", "MacOS"], "packageName": "wolfSSL", "programFiles": ["src/tls.c"], "collectionURL": "https://www.wolfssl.com/download/", "defaultStatus": "unaffected"}], "references": [{"url": "https://github.com/wolfSSL/wolfssl"}, {"url": "https://github.com/wolfSSL/wolfssl/pull/9117"}], "x_generator": {"engine": "Vulnogram 0.2.0"}, "descriptions": [{"lang": "en", "value": "Improper input validation in the TLS 1.3 KeyShareEntry parsing in wolfSSL v5.8.2 on multiple platforms allows a remote unauthenticated attacker to cause a denial-of-service by sending a crafted ClientHello message containing duplicate KeyShareEntry values for the same supported group, leading to excessive CPU and memory consumption during ClientHello processing.", "supportingMedia": [{"type": "text/html", "value": "<p>Improper input validation in the TLS 1.3 KeyShareEntry parsing in wolfSSL v5.8.2 on multiple platforms allows a remote unauthenticated attacker to cause a denial-of-service by sending a crafted ClientHello message containing duplicate KeyShareEntry values for the same supported group, leading to excessive CPU and memory consumption during ClientHello processing.</p><br>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-20", "description": "CWE-20 Improper Input Validation"}]}], "providerMetadata": {"orgId": "50d2cd11-d01a-48ed-9441-5bfce9d63b27", "shortName": "wolfSSL", "dateUpdated": "2025-12-08T15:50:46.421Z"}}}, "cveMetadata": {"cveId": "CVE-2025-11936", "state": "PUBLISHED", "dateUpdated": "2025-12-08T15:50:46.421Z", "dateReserved": "2025-10-17T22:28:29.097Z", "assignerOrgId": "50d2cd11-d01a-48ed-9441-5bfce9d63b27", "datePublished": "2025-11-21T22:24:27.443Z", "assignerShortName": "wolfSSL"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"collectionURL": "https://www.wolfssl.com/download/", "defaultStatus": "unaffected", "modules": ["wolfSSL"], "packageName": "wolfSSL", "platforms": ["Linux", "MacOS"], "product": "wolfSSL", "programFiles": ["src/tls.c"], "repo": "https://github.com/wolfSSL/wolfssl", "vendor": "wolfSSL", "versions": [{"lessThan": "5.8.4", "status": "affected", "version": "3.12.0", "versionType": "git"}]}], "source": "facts@wolfssl.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*", "matchCriteriaId": "EB81B784-14DD-4CD0-859A-62D42ADDD7D3", "versionEndExcluding": "5.8.4", "versionStartIncluding": "5.8.2", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper input validation in the TLS 1.3 KeyShareEntry parsing in wolfSSL v5.8.2 on multiple platforms allows a remote unauthenticated attacker to cause a denial-of-service by sending a crafted ClientHello message containing duplicate KeyShareEntry values for the same supported group, leading to excessive CPU and memory consumption during ClientHello processing."}, {"lang": "es", "value": "Validaci\u00f3n de entrada incorrecta en el an\u00e1lisis de KeyShareEntry de TLS 1.3 en wolfSSL v5.8.2 en m\u00faltiples plataformas permite a un atacante remoto no autenticado causar una denegaci\u00f3n de servicio mediante el env\u00edo de un mensaje ClientHello manipulado que contiene valores KeyShareEntry duplicados para el mismo grupo compatible, lo que lleva a un consumo excesivo de CPU y memoria durante el procesamiento de ClientHello."}], "id": "CVE-2025-11936", "lastModified": "2026-10-19T13:10:00.110", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "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:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.3, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "facts@wolfssl.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-11936", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-11-24T16:19:13.484463Z", "version": "2.0.3"}}]}, "published": "2025-11-21T23:15:44.710", "references": [{"source": "facts@wolfssl.com", "tags": ["Product"], "url": "https://github.com/wolfSSL/wolfssl"}, {"source": "facts@wolfssl.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/wolfSSL/wolfssl/pull/9117"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/wolfSSL/wolfssl/pull/9117"}], "sourceIdentifier": "facts@wolfssl.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "facts@wolfssl.com", "type": "Secondary"}]}

{}

{"created": "2025-11-24T09:08:15.513699+00:00", "updated": "2025-11-24T09:08:15.513729+00:00", "vendors": ["wolfssl", "wolfssl$PRODUCT$wolfssl"]}