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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| tendermint | tendermint | >= 0.33.0, < 0.33.6 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/tendermint/tendermint | < 0.33.6 | 0.33.6 | GHSA-6jqj-f58p-mrw3 |
| Go | github.com/tendermint/tendermint | >= 0.33.0, < 0.34.0-dev1.0.20200702134149-480b995a3172 | 0.34.0-dev1.0.20200702134149-480b995a3172 | GO-2021-0090 |