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Advisories

Zebra before 7.0.0 Sync Denial of Service via Forged Checkpoint Block Body

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Severity
high
Date
Affecting

  • zebra >= 0, < 7.0.0

CWE
  • CWE-459 Incomplete Cleanup
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
saxenism, oxarbitrage, mpguerra
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.

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