CVE-2020-11735 : What You Need to Know
Learn about CVE-2020-11735, a vulnerability in wolfSSL before 4.4.0 that can lead to a 'projective coordinates leak.' Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
WolfSSL before 4.4.0 is affected by a vulnerability in private-key operations that can lead to a 'projective coordinates leak.'
Understanding CVE-2020-11735
What is CVE-2020-11735?
The vulnerability in the private-key operations of wolfSSL before version 4.4.0 can result in a 'projective coordinates leak.'
The Impact of CVE-2020-11735
This vulnerability could potentially expose sensitive information during private-key operations, posing a risk to the confidentiality of cryptographic operations.
Technical Details of CVE-2020-11735
Vulnerability Description
The issue arises from the lack of using a constant-time modular inverse during mapping to affine coordinates in ecc.c.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions affected: Not applicable
Exploitation Mechanism
The vulnerability can be exploited by an attacker to potentially leak projective coordinates during private-key operations.
Mitigation and Prevention
Immediate Steps to Take
- Update wolfSSL to version 4.4.0 or later to mitigate the vulnerability.
- Monitor for any unusual activities related to cryptographic operations.
Long-Term Security Practices
- Implement secure coding practices to prevent similar vulnerabilities in cryptographic libraries.
- Regularly review and update cryptographic libraries to address known security issues.
Patching and Updates
Ensure timely patching and updates of wolfSSL to the latest version to protect against potential security risks.