CVE-2020-15091 (GCVE-0-2020-15091)
Vulnerability from cvelistv5
Published
2020-07-02 17:05
Modified
2024-08-04 13:08
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-347 - {"":"Improper Verification of Cryptographic Signature"}
Summary
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.
References
Impacted products
Vendor Product Version
tendermint tendermint Version: >= 0.33.0, < 0.33.6
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