CVE-2022-23507
Description
Tendermint is a high-performance blockchain consensus engine for Byzantine fault tolerant applications. Versions prior to 0.28.0 contain a potential attack via Improper Verification of Cryptographic Signature, affecting anyone using the tendermint-light-client and related packages to perform light client verification (e.g. IBC-rs, Hermes). 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. This issue is patched in version 0.28.0. There are no workarounds.
How to fix
- tendermint-light-client_project tendermint-light-client0.28.0 or later
- tendermint-light-client-js_project tendermint-light-client-js0.28.0 or later
- tendermint-light-client-verifier_project tendermint-light-client-verifier0.28.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| tendermint-light-client_project tendermint-light-client | v < 0.28.0 | 0.28.0 |
| tendermint-light-client-js_project tendermint-light-client-js | v < 0.28.0 | 0.28.0 |
| tendermint-light-client-verifier_project tendermint-light-client-verifier | v < 0.28.0 | 0.28.0 |
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Attack Surface Management
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