Login error in Bitcoin Core bip125
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-31876 |
| CWE-ID | CWE-840 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Bitcoin Core Other software / Other software solutions |
| Vendor | Bitcoin |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Business Logic Errors
EUVDB-ID: #VU52962
Risk: Medium
CVSSv3.1: 4.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-31876
CWE-ID:
CWE-840 - Business Logic Errors (3.0)
Exploit availability: No
DescriptionThe 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.
Install updates from vendor's website.
Vulnerable software versionsBitcoin Core: 0.12.0 - 0.21.0
External linkshttp://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures#CVE-2021-31876
http://lists.linuxfoundation.org/pipermail/bitcoin-dev/2021-May/018893.html
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
