Advisories

Zebra 2.3.0 before 7.0.0 Denial of Service via Unscored Script Verification Failures

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Severity
high
Date
Affecting
  • zebra >= 2.3.0, < 7.0.0

  • zebra >= 1.0.0-beta.46, < 18.0.0

CWE
  • CWE-755 Improper Handling of Exceptional Conditions
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
x15-eth, mpguerra, conradoplg, upbqdn
Description
Zebra from 2.3.0 before 7.0.0 contains a denial of service vulnerability that allows unauthenticated peers to evade misbehavior scoring by sending transactions or blocks with invalid transparent scripts. Attackers can flood mempool with script-failing transactions or serve forged v5 block bodies with altered scriptSig bytes to exhaust CPU and repeatedly stall block sync.

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