{"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"}}]}}