CVE-2021-38385 : What You Need to Know
Learn about CVE-2021-38385 impacting Tor versions before 0.3.5.16, 0.4.5.10, and 0.4.6.7. Discover the impact, technical details, and mitigation steps to secure your systems.
This CVE record pertains to a vulnerability in Tor versions before 0.3.5.16, 0.4.5.10, and 0.4.6.7, leading to a remote assertion failure. Read on to understand the impact, technical details, and mitigation steps.
Understanding CVE-2021-38385
This section provides insights into the implications of the vulnerability and how it can affect systems.
What is CVE-2021-38385?
CVE-2021-38385 refers to a flaw in Tor software versions, which results in an incorrect handling of batch-signature verification in connection with single-signature verification. Attackers could exploit this to trigger a remote assertion failure, identified as TROVE-2021-007.
The Impact of CVE-2021-38385
The vulnerability can have the following consequences:
- Remote assertion failure may occur.
- Attackers could potentially exploit this to compromise system integrity.
Technical Details of CVE-2021-38385
In this section, we delve into the specifics of the vulnerability.
Vulnerability Description
The issue arises from the mishandling of relationships between batch-signature and single-signature verification in older Tor versions.
Affected Systems and Versions
- Vendor: n/a
- Product: n/a
- Affected Versions: Tor versions before 0.3.5.16, 0.4.5.10, and 0.4.6.7
Exploitation Mechanism
The vulnerability is exploited by manipulating the batch-signature verification process, leading to a remote assertion failure.
Mitigation and Prevention
Find out how to address this vulnerability and enhance system security.
Immediate Steps to Take
- Update Tor to versions 0.3.5.16, 0.4.5.10, or 0.4.6.7 to mitigate the risk.
- Monitor for any unusual system behavior that could indicate an exploit.
Long-Term Security Practices
- Regularly update Tor software to the latest versions to protect against vulnerabilities.
- Employ network segmentation to limit the spread of potential attacks.
Patching and Updates
- Stay informed about security advisories and patches released by Tor Project.
- Apply security updates promptly to ensure protection against known vulnerabilities.