Friday, May 14, 2021

CVE-2021-31876

Description

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 to Advisories, Solutions, and Tools


References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace.
We have provided these links to other web sites because they
may have information that would be of interest to you. No
inferences should be drawn on account of other sites being
referenced, or not, from this page. There may be other web
sites that are more appropriate for your purpose. NIST does
not necessarily endorse the views expressed, or concur with
the facts presented on these sites. Further, NIST does not
endorse any commercial products that may be mentioned on
these sites. Please address comments about this page to [email protected]
Resourcehttps://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-2021-31876https://github.com/bitcoin/bitcoinhttps://lists.linuxfoundation.org/pipermail/bitcoin-dev/2021-May/018893.html
 

Copyright © 2020 Cyber Details - Vulnerability Database™

Thanks for everything Templateism - You should have written the code a little more complicated