GHSA-xqqc-c5gw-c5r5
Tendermint light client verification not taking into account chain ID
Details
### Impact
Anyone using the `tendermint-light-client` and related packages to perform light client verification (e.g. IBC-rs, Hermes).
At present, the light client does not check that the chain IDs of the trusted and untrusted headers match, resulting in a possible attack vector where someone who finds a header from an untrusted chain that satisfies all other verification conditions (e.g. enough overlapping validator signatures) could fool a light client.
The attack vector is currently theoretical, and no proof-of-concept exists yet to exploit it on live networks.
### Patches
Users of the light client-related crates can currently upgrade to `v0.28.0`.
### Workarounds
None
### References
- [Light Client specification](https://github.com/tendermint/tendermint/tree/main/spec/light-client)
Are you affected?
Enter the version of the package you're using.
Affected packages
0Fixed in: 0.28.0Upgrade tendermint-light-client-verifier to 0.28.0 or newer (ecosystem crates.io).
0Fixed in: 0.28.0Upgrade tendermint-light-client to 0.28.0 or newer (ecosystem crates.io).
0Fixed in: 0.28.0Upgrade tendermint-light-client-js to 0.28.0 or newer (ecosystem crates.io).
References
- https://github.com/informalsystems/tendermint-rs/security/advisories/GHSA-xqqc-c5gw-c5r5[WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2022-23507[ADVISORY]
- https://github.com/informalsystems/tendermint-rs/commit/5c32f31b97ac3172775699fe0d4ba6003ca4fb18[WEB]
- https://github.com/informalsystems/tendermint-rs[PACKAGE]