Bitcoin Core 0.12.0 through 0.21.1 does not properly implement the replacement policy specified in BIP125, which makes it easier for attackers to trigger a loss of funds, or a denial of service attack against downstream projects such as Lightning network nodes. An unconfirmed child transaction with nSequence = 0xff_ff_ff_ff, spending an unconfirmed parent with nSequence <= 0xff_ff_ff_fd, should be replaceable because there is inherited signaling by the child transaction. However, the actual PreChecks implementation does not enforce this. Instead, mempool rejects the replacement attempt of the unconfirmed child transaction.
References
Link | Resource |
---|---|
https://bitcoinops.org/en/newsletters/2021/05/12/ | Vendor Advisory |
https://bitcoinops.org/en/topics/replace-by-fee/ | Vendor Advisory |
https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures#CVE-2021-31876 | Third Party Advisory |
https://github.com/bitcoin/bitcoin | Third Party Advisory |
https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2021-May/018893.html | Mailing List Third Party Advisory |
Configurations
History
No history.
Information
Published : 2021-05-13 22:15
Updated : 2024-02-28 18:28
NVD link : CVE-2021-31876
Mitre link : CVE-2021-31876
CVE.ORG link : CVE-2021-31876
JSON object : View
Products Affected
bitcoin
- bitcoin
CWE
CWE-863
Incorrect Authorization