cve/2022/CVE-2022-23507.md

### [CVE-2022-23507](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23507)
![](https://img.shields.io/static/v1?label=Product&message=tendermint-rs&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%200.28.0%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-347%3A%20Improper%20Verification%20of%20Cryptographic%20Signature&color=brighgreen)

### 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.

### POC

#### Reference
- https://github.com/informalsystems/tendermint-rs/security/advisories/GHSA-xqqc-c5gw-c5r5

#### Github
No PoCs found on GitHub currently.