{"id":"CVE-2020-15091","state":"PUBLISHED","title":"Denial of Service in TenderMint","description":"TenderMint from version 0.33.0 and before version 0.33.6 allows block proposers to include signatures for the wrong block. This may happen naturally if you start a network, have it run for some time and restart it (**without changing chainID**). A malicious block proposer (even with a minimal amount of stake) can use this vulnerability to completely halt the network. This issue is fixed in Tendermint 0.33.6 which checks all the signatures are for the block with 2/3+ majority before creating a commit.","publishedAt":"2020-07-02T17:05:15.000Z","updatedAt":"2024-08-04T13:08:21.884Z","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":["tendermint tendermint"],"affected":[{"vendor":"tendermint","product":"tendermint","versions":[{"version":">= 0.33.0, < 0.33.6","status":"affected"}]}],"references":["https://github.com/tendermint/tendermint/security/advisories/GHSA-6jqj-f58p-mrw3","https://github.com/tendermint/tendermint/issues/4926","https://github.com/tendermint/tendermint/commit/480b995a31727593f58b361af979054d17d84340"],"weaknesses":["CWE-347"],"ingestedAt":"2026-10-29T19:46:36.523Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2020/15xxx/CVE-2020-15091.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2020-15091","state":"PUBLISHED","datePublished":"2020-07-02T17:05:15.000Z","dateUpdated":"2024-08-04T13:08:21.884Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2020-06-25T00:00:00.000Z"},"containers":{"cna":{"title":"Denial of Service in TenderMint","descriptions":[{"lang":"en","value":"TenderMint from version 0.33.0 and before version 0.33.6 allows block proposers to include signatures for the wrong block. This may happen naturally if you start a network, have it run for some time and restart it (**without changing chainID**). A malicious block proposer (even with a minimal amount of stake) can use this vulnerability to completely halt the network. This issue is fixed in Tendermint 0.33.6 which checks all the signatures are for the block with 2/3+ majority before creating a commit."}],"affected":[{"vendor":"tendermint","product":"tendermint","versions":[{"version":">= 0.33.0, < 0.33.6","status":"affected"}]}],"references":[{"url":"https://github.com/tendermint/tendermint/security/advisories/GHSA-6jqj-f58p-mrw3","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/tendermint/tendermint/issues/4926","tags":["x_refsource_MISC"]},{"url":"https://github.com/tendermint/tendermint/commit/480b995a31727593f58b361af979054d17d84340","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-347","description":"{\"CWE-347\":\"Improper Verification of Cryptographic Signature\"}","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","dateUpdated":"2020-07-02T17:05:15.000Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa"},"source":{"advisory":"GHSA-6jqj-f58p-mrw3","discovery":"UNKNOWN"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"security-advisories@github.com","ID":"CVE-2020-15091","STATE":"PUBLIC","TITLE":"Denial of Service in TenderMint"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"tendermint","version":{"version_data":[{"version_value":">= 0.33.0, < 0.33.6"}]}}]},"vendor_name":"tendermint"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"TenderMint from version 0.33.0 and before version 0.33.6 allows block proposers to include signatures for the wrong block. This may happen naturally if you start a network, have it run for some time and restart it (**without changing chainID**). A malicious block proposer (even with a minimal amount of stake) can use this vulnerability to completely halt the network. This issue is fixed in Tendermint 0.33.6 which checks all the signatures are for the block with 2/3+ majority before creating a commit."}]},"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-347\":\"Improper Verification of Cryptographic Signature\"}"}]}]},"references":{"reference_data":[{"name":"https://github.com/tendermint/tendermint/security/advisories/GHSA-6jqj-f58p-mrw3","refsource":"CONFIRM","url":"https://github.com/tendermint/tendermint/security/advisories/GHSA-6jqj-f58p-mrw3"},{"name":"https://github.com/tendermint/tendermint/issues/4926","refsource":"MISC","url":"https://github.com/tendermint/tendermint/issues/4926"},{"name":"https://github.com/tendermint/tendermint/commit/480b995a31727593f58b361af979054d17d84340","refsource":"MISC","url":"https://github.com/tendermint/tendermint/commit/480b995a31727593f58b361af979054d17d84340"}]},"source":{"advisory":"GHSA-6jqj-f58p-mrw3","discovery":"UNKNOWN"}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://github.com/tendermint/tendermint/security/advisories/GHSA-6jqj-f58p-mrw3","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://github.com/tendermint/tendermint/issues/4926","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://github.com/tendermint/tendermint/commit/480b995a31727593f58b361af979054d17d84340","tags":["x_refsource_MISC","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T13:08:21.884Z"}}]}}}