{"id":"CVE-2020-26264","state":"PUBLISHED","title":"LES Server DoS via GetProofsV2","description":"Go Ethereum, or \"Geth\", is the official Golang implementation of the Ethereum protocol. In Geth before version 1.9.25 a denial-of-service vulnerability can make a LES server crash via malicious GetProofsV2 request from a connected LES client. This vulnerability only concerns users explicitly enabling les server; disabling les prevents the exploit. The vulnerability was patched in version 1.9.25.","publishedAt":"2020-12-11T16:45:24.000Z","updatedAt":"2024-08-04T15:56:04.248Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["ethereum go-ethereum"],"affected":[{"vendor":"ethereum","product":"go-ethereum","versions":[{"version":"< 1.9.25","status":"affected"}]}],"references":["https://github.com/ethereum/go-ethereum/security/advisories/GHSA-r33q-22hv-j29q","https://github.com/ethereum/go-ethereum/pull/21896","https://github.com/ethereum/go-ethereum/commit/bddd103a9f0af27ef533f04e06ea429cf76b6d46","https://github.com/ethereum/go-ethereum/releases/tag/v1.9.25"],"weaknesses":["CWE-400"],"ingestedAt":"2026-10-29T19:47:08.370Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2020/26xxx/CVE-2020-26264.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2020-26264","state":"PUBLISHED","datePublished":"2020-12-11T16:45:24.000Z","dateUpdated":"2024-08-04T15:56:04.248Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2020-10-01T00:00:00.000Z"},"containers":{"cna":{"title":"LES Server DoS via GetProofsV2","descriptions":[{"lang":"en","value":"Go Ethereum, or \"Geth\", is the official Golang implementation of the Ethereum protocol. In Geth before version 1.9.25 a denial-of-service vulnerability can make a LES server crash via malicious GetProofsV2 request from a connected LES client. This vulnerability only concerns users explicitly enabling les server; disabling les prevents the exploit. The vulnerability was patched in version 1.9.25."}],"affected":[{"vendor":"ethereum","product":"go-ethereum","versions":[{"version":"< 1.9.25","status":"affected"}]}],"references":[{"url":"https://github.com/ethereum/go-ethereum/security/advisories/GHSA-r33q-22hv-j29q","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/ethereum/go-ethereum/pull/21896","tags":["x_refsource_MISC"]},{"url":"https://github.com/ethereum/go-ethereum/commit/bddd103a9f0af27ef533f04e06ea429cf76b6d46","tags":["x_refsource_MISC"]},{"url":"https://github.com/ethereum/go-ethereum/releases/tag/v1.9.25","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","description":"CWE-400 Uncontrolled Resource Consumption","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","dateUpdated":"2020-12-11T16:45:24.000Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa"},"source":{"advisory":"GHSA-r33q-22hv-j29q","discovery":"UNKNOWN"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"security-advisories@github.com","ID":"CVE-2020-26264","STATE":"PUBLIC","TITLE":"LES Server DoS via GetProofsV2"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"go-ethereum","version":{"version_data":[{"version_value":"< 1.9.25"}]}}]},"vendor_name":"ethereum"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"Go Ethereum, or \"Geth\", is the official Golang implementation of the Ethereum protocol. In Geth before version 1.9.25 a denial-of-service vulnerability can make a LES server crash via malicious GetProofsV2 request from a connected LES client. This vulnerability only concerns users explicitly enabling les server; disabling les prevents the exploit. The vulnerability was patched in version 1.9.25."}]},"impact":{"cvss":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-400 Uncontrolled Resource Consumption"}]}]},"references":{"reference_data":[{"name":"https://github.com/ethereum/go-ethereum/security/advisories/GHSA-r33q-22hv-j29q","refsource":"CONFIRM","url":"https://github.com/ethereum/go-ethereum/security/advisories/GHSA-r33q-22hv-j29q"},{"name":"https://github.com/ethereum/go-ethereum/pull/21896","refsource":"MISC","url":"https://github.com/ethereum/go-ethereum/pull/21896"},{"name":"https://github.com/ethereum/go-ethereum/commit/bddd103a9f0af27ef533f04e06ea429cf76b6d46","refsource":"MISC","url":"https://github.com/ethereum/go-ethereum/commit/bddd103a9f0af27ef533f04e06ea429cf76b6d46"},{"name":"https://github.com/ethereum/go-ethereum/releases/tag/v1.9.25","refsource":"MISC","url":"https://github.com/ethereum/go-ethereum/releases/tag/v1.9.25"}]},"source":{"advisory":"GHSA-r33q-22hv-j29q","discovery":"UNKNOWN"}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://github.com/ethereum/go-ethereum/security/advisories/GHSA-r33q-22hv-j29q","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://github.com/ethereum/go-ethereum/pull/21896","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://github.com/ethereum/go-ethereum/commit/bddd103a9f0af27ef533f04e06ea429cf76b6d46","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://github.com/ethereum/go-ethereum/releases/tag/v1.9.25","tags":["x_refsource_MISC","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T15:56:04.248Z"}}]}}}