Vulnerability · Published Jul 2, 2020 · Assigned by GitHub_M
CVE-2020-15091Denial of Service in TenderMint
Medium 6.5
In plain English
A medium-severity security flaw in tendermint from tendermint. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/tendermint/tendermint | 0.34.0-dev1.0.20200702134149-480b995a3172 | GO-2021-0090 |
| Go | github.com/tendermint/tendermint | 0.33.6 | GHSA-6jqj-f58p-mrw3 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| tendermint | tendermint | >= 0.33.0, < 0.33.6 |
Weakness: CWE-347 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H