Description
Zebra before 7.0.0 contains an incomplete cleanup vulnerability that allows unauthenticated peers to stall initial sync by serving a forged checkpoint block body. Attackers can supply a body with forged authorizing data near the final checkpoint, leaving rejected hashes in the sent-hash set so the node stops requesting blocks until restart.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ZcashFoundation | zebra | < 7.0.0 | 7.0.0 |
References
- GitHub Security Advisory (GHSA-9hq5-pfgc-cx5h) vendor-advisory
- VulnCheck Advisory: Zebra before 7.0.0 Sync Denial of Service via Forged Checkpoint Block Body third-party-advisory