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Advisories

Zebra 6.4.0 before 6.4.2 Denial of Service via Malformed v6 Transaction

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severity
high
date
Affecting

  • zebra >= 6.4.0, < 6.4.2

CWE
  • CWE-617 Reachable Assertion
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
conradoplg, mpguerra
Description
ZcashFoundation Zebra 6.4.0 before 6.4.2 parses version 6 transactions carrying a pre-NU6.3 consensus branch ID, but the size computation during UnminedTx construction treats re-serialization of the Orchard bundle as infallible, so the resulting error trips an expect that aborts zebrad. Unauthenticated peers can send a single pre-handshake tx message to crash the node, and can repeat this after each restart.

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