Business Logic Errors in Bitcoin Core - CVE-2021-31876
Published: May 7, 2021
Vulnerability identifier: #VU52962
CSH Severity: Medium
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-31876
CWE-ID: CWE-840
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass certain security restrictions.
The vulnerability exists due to a logic error in Bitcoin Core bip125 logic, related to processing of unconfirmed transactions. A remote attacker can perform state-of-the-art pinning attacks or have other impact on various wallets.
Affected software
Bitcoin Core
How to mitigate CVE-2021-31876
Install updates from vendor's website.
Bitcoin Core - update to 0.21.1