CVE-2020-15091
TenderMint from version 0.33.0 and before version 0.33.6 allows block proposers to include signatures for the wrong block.
Does this matter?
Lower severity and a low EPSS score (0.91%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.91% probability · 58th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-347
- Affected
- tendermint/tendermint
- Source
- security-advisories@github.com
References
- https://github.com/tendermint/tendermint/commit/480b995a31727593f58b361af979054d17d84340Patch, Third Party Advisory
- https://github.com/tendermint/tendermint/issues/4926Exploit, Issue Tracking, Third Party Advisory
- https://github.com/tendermint/tendermint/security/advisories/GHSA-6jqj-f58p-mrw3Exploit, Third Party Advisory
- https://github.com/tendermint/tendermint/commit/480b995a31727593f58b361af979054d17d84340Patch, Third Party Advisory
- https://github.com/tendermint/tendermint/issues/4926Exploit, Issue Tracking, Third Party Advisory
- https://github.com/tendermint/tendermint/security/advisories/GHSA-6jqj-f58p-mrw3Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.