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Advisories

Zebra before 6.1.0 Chain Stall via Stale parent_error_map Entry

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severity
high
date
Affecting

  • zebra >= 0, < 6.1.0

CWE
  • CWE-459 Incomplete Cleanup
CVSS
8.2
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
deedim, jvff, upbqdn
Description
Zebra before 6.1.0 contains an incomplete cleanup vulnerability in the state write task that allows remote unauthenticated peers to stall node synchronization by poisoning parent_error_map. Attackers can deliver a coinbase-malleated block sharing a canonical block's hash before it propagates, causing the next canonical block to be rejected and stalling the node for roughly 2,000 blocks.

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