Description
Zebra (zebrad) 4.5.0 before 6.3.0 discards which peer supplied the block hashes in FindBlocks responses, then assigns 100 misbehavior points, the ban threshold, to whichever peer serves a requested block more than 50,000 heights above the tip. A remote peer can return real far-ahead hashes to a syncing node so that honest peers get banned, eroding its peer set and raising eclipse risk.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ZcashFoundation | zebra | < 6.3.0 | 6.3.0 |
References
- GitHub Security Advisory (GHSA-qhr3-cvch-5fh2) vendor-advisory
- VulnCheck Advisory: Zebra before 6.3.0 Honest Peer Banning via Far-Ahead FindBlocks Hashes third-party-advisory