Zebra has pre-handshake buffer capacity reservation based on attacker-claimed body length
Zebra has pre-handshake buffer capacity reservation based on attacker-claimed body length. You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your node accepts inbound P2P connections (network.listenaddr is set, which is the default).
Vuln-watch · relayed from the GitHub Advisory Database; see Source & attribution below
Summary
You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your node accepts inbound P2P connections (network.listenaddr is set, which is the default).
Affected
- zebra-network (rust) <= 6.0.0 — fixed in 7.0.0
- zebrad (rust) <= 4.4.1 — fixed in 4.5.0
Severity
Low, as rated by the upstream advisory.
Recommended actions
- Upgrade zebra-network to 7.0.0 or later
- Upgrade zebrad to 4.5.0 or later
Source & attribution
This 0xCERT advisory summarises GHSA-h72h-ppcx-998p from the GitHub Advisory Database, credited upstream to ouicate, oxarbitrage: https://github.com/advisories/GHSA-h72h-ppcx-998p. Details may change; refer to the original source for the authoritative record.
References
- https://github.com/advisories/GHSA-h72h-ppcx-998p
- https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-h72h-ppcx-998p
- https://github.com/ZcashFoundation/zebra/blob/d4cd662c716382f6397d2a730148025a1ca79fec/zebra-network/src/peer/handshake.rs#L917-L934
- https://github.com/ZcashFoundation/zebra/blob/d4cd662c716382f6397d2a730148025a1ca79fec/zebra-network/src/protocol/external/codec.rs#L359-L416
OpenPGP-signed. The signed text of this advisory verifies against the 0xCERT key CCC7 D9EC 9415 723D.
Published 2026-07-02 · last updated 2026-10-08
curl -s https://www.0xcert.com/pgp.asc | gpg --import && curl -s https://www.0xcert.com/advisory/0xCERT-2026-0203/signed.txt | gpg --verify