Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS14cXFjLWM1Z3ctYzVyNc4AAwWv

Tendermint light client verification not taking into account chain ID

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

Permalink: https://github.com/advisories/GHSA-xqqc-c5gw-c5r5
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS14cXFjLWM1Z3ctYzVyNc4AAwWv
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: over 1 year ago
Updated: about 1 year ago

CVSS Score: 5.4
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

Identifiers: GHSA-xqqc-c5gw-c5r5, CVE-2022-23507
References:

• https://github.com/informalsystems/tendermint-rs/security/advisories/GHSA-xqqc-c5gw-c5r5
• https://github.com/informalsystems/tendermint-rs/commit/5c32f31b97ac3172775699fe0d4ba6003ca4fb18
• https://nvd.nist.gov/vuln/detail/CVE-2022-23507
• https://github.com/advisories/GHSA-xqqc-c5gw-c5r5

Repository: https://github.com/informalsystems/tendermint-rs
Blast Radius: 8.9

Affected Packages