Incorrect Authorization The advisory has been revoked - it doesn't affect any version of package bitcoin (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-BITCOIN-1293171
- published15 May 2021
- disclosed13 May 2021
Introduced: 13 May 2021
CVE-2021-31876 (opens in a new tab)Amendment
The Debian security team deemed this advisory irrelevant for Debian:unstable.
NVD Description
Note: Versions mentioned in the description apply only to the upstream bitcoin package and not the bitcoin package as distributed by Debian.
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
- https://security-tracker.debian.org/tracker/CVE-2021-31876
- https://bitcoinops.org/en/newsletters/2021/05/12/
- https://bitcoinops.org/en/topics/replace-by-fee/
- https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures#CVE-2021-31876
- https://github.com/bitcoin/bitcoin
- https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2021-May/018893.html