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.
Users of the light client-related crates can currently upgrade to v0.28.0
.
None
{ "nvd_published_at": "2022-12-15T19:15:00Z", "github_reviewed_at": "2022-12-14T21:35:24Z", "severity": "MODERATE", "github_reviewed": true, "cwe_ids": [ "CWE-347" ] }