CVE-2020-15091GO-2021-0090GHSA-6JQJ-F58P-MRW3
Denial of Service in TenderMint
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 0.33.6, 0.34.0-dev1.0.20200702134149-480b995a3172
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
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.
Timeline
- CVE published
- Record last updated
Affected versions
- tendermint tendermint
From 0.33.0 · fixed in 0.33.6
- github.com/tendermint/tendermintGo
From 0.33.0 · fixed in 0.34.0-dev1.0.20200702134149-480b995a3172
- github.com/tendermint/tendermintGo
fixed in 0.33.6