CVE-2022-23507

Light client verification not taking into account chain ID

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.

Category

5.4
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.11%
Third-Party Advisory github.com
Affected: informalsystems tendermint-rs
Published at:
Updated at:

References

Link Tags
https://github.com/informalsystems/tendermint-rs/security/advisories/GHSA-xqqc-c5gw-c5r5 third party advisory

Frequently Asked Questions

What is the severity of CVE-2022-23507?
CVE-2022-23507 has been scored as a medium severity vulnerability.
How to fix CVE-2022-23507?
To fix CVE-2022-23507, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-23507 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-23507 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-23507?
CVE-2022-23507 affects informalsystems tendermint-rs.
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