CVE Alert: CVE-2024-38365
Vulnerability Summary: CVE-2024-38365
btcd is an alternative full node bitcoin implementation written in Go (golang). The btcd Bitcoin client (versions 0.10 to 0.24) did not correctly re-implement Bitcoin Core’s “FindAndDelete()” functionality. This logic is consensus-critical: the difference in behavior with the other Bitcoin clients can lead to btcd clients accepting an invalid Bitcoin block (or rejecting a valid one). This consensus failure can be leveraged to cause a chain split (accepting an invalid Bitcoin block) or be exploited to DoS the btcd nodes (rejecting a valid Bitcoin block). An attacker can create a standard transaction where FindAndDelete doesn’t return a match but removeOpCodeByData does making btcd get a different sighash, leading to a chain split. Importantly, this vulnerability can be exploited remotely by any Bitcoin user and does not require any hash power. This is because the difference in behavior can be triggered by a “standard” Bitcoin transaction, that is a transaction which gets relayed through the P2P network before it gets included in a Bitcoin block. `removeOpcodeByData(script []byte, dataToRemove []byte)` removes any data pushes from `script` that contain `dataToRemove`. However, `FindAndDelete` only removes exact matches. So for example, with `script = “
Affected Endpoints:
No affected endpoints listed.
Published Date:
10/11/2024, 8:15:04 PM
🔥 CVSS Score:
Exploit Status:
Not ExploitedReferences:
- https://delvingbitcoin.org/t/cve-2024-38365-public-disclosure-btcd-findanddelete-bug/1184
- https://github.com/btcsuite/btcd/commit/04469e600e7d4a58881e2e5447d19024e49800f5
- https://github.com/btcsuite/btcd/releases/tag/v0.24.2
- https://github.com/btcsuite/btcd/security/advisories/GHSA-27vh-h6mc-q6g8
Recommended Action:
No proposed action available. Please refer to vendor documentation for updates.
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