CVE-2021-3195 : What You Need to Know

Bitcoin Core through version 0.21.0 is impacted by CVE-2021-3195, where bitcoind can create a new file in an arbitrary directory through a dumpwallet RPC call. This issue is disputed as it reportedly does not violate Bitcoin Core's security model.

Understanding CVE-2021-3195

This section will discuss what CVE-2021-3195 is about and its potential impact.

What is CVE-2021-3195?

CVE-2021-3195 affects Bitcoin Core through version 0.21.0, allowing bitcoind to create a new file in any directory using a dumpwallet RPC call.

The Impact of CVE-2021-3195

Though disputed, this vulnerability can potentially compromise the security model of forks that have imposed dumpwallet restrictions.

Technical Details of CVE-2021-3195

Explore more about the technical aspects of CVE-2021-3195 below.

Vulnerability Description

The vulnerability in Bitcoin Core enables bitcoind to create files outside the designated directory via a dumpwallet RPC command.

Affected Systems and Versions

Bitcoin Core versions up to 0.21.0 are impacted by this vulnerability.

Exploitation Mechanism

By utilizing the dumpwallet RPC call, adversaries can exploit this vulnerability to create files in unauthorized directories.

Mitigation and Prevention

Learn how to mitigate and prevent the exploitation of CVE-2021-3195 below.

Immediate Steps to Take

Users are advised to update to the latest Bitcoin Core version and restrict access to sensitive directories.

Long-Term Security Practices

Implement proper access controls and regularly monitor file creation activities on the system.

Patching and Updates

Bitcoin Core users should apply patches provided by the official project to address CVE-2021-3195 and enhance system security.