CVE-2018-0498 : Security Advisory and Response

ARM mbed TLS before 2.12.0, 2.7.5, and 2.1.14 allows local users to achieve partial plaintext recovery via a cache-based side-channel attack.

Understanding CVE-2018-0498

Local users can exploit a cache-based side-channel attack to achieve partial recovery of plaintext in ARM mbed TLS versions prior to 2.12.0, 2.7.5, and 2.1.14. This vulnerability affects CBC-based ciphersuites.

What is CVE-2018-0498?

CVE-2018-0498 is a vulnerability in ARM mbed TLS versions before 2.12.0, 2.7.5, and 2.1.14 that allows local users to achieve partial plaintext recovery through a cache-based side-channel attack.

The Impact of CVE-2018-0498

Local users can exploit the vulnerability to achieve partial recovery of plaintext in affected versions of ARM mbed TLS.
The issue affects CBC-based ciphersuites, potentially compromising data confidentiality.

Technical Details of CVE-2018-0498

ARM mbed TLS before 2.12.0, 2.7.5, and 2.1.14 are susceptible to a cache-based side-channel attack leading to plaintext recovery.

Vulnerability Description

The vulnerability allows local users to partially recover plaintext through a cache-based side-channel attack.

Affected Systems and Versions

ARM mbed TLS versions before 2.12.0, 2.7.5, and 2.1.14 are affected.

Exploitation Mechanism

Local users can exploit the cache-based side-channel attack to achieve partial recovery of plaintext.

Mitigation and Prevention

Immediate Steps to Take:

Update ARM mbed TLS to version 2.12.0 or later to mitigate the vulnerability.
Monitor vendor security advisories for patches and updates. Long-Term Security Practices:
Implement the principle of least privilege to restrict user access.
Regularly review and update security configurations to prevent similar vulnerabilities.
Conduct security training to educate users on best practices.
Employ encryption mechanisms to enhance data protection.
Regularly monitor and audit system activities for unusual behavior.
Stay informed about security best practices and emerging threats.
Apply security patches and updates promptly to address known vulnerabilities.