CVE-2020-5917 : Vulnerability Insights and Analysis

In BIG-IP versions 15.1.0-15.1.0.4, 15.0.0-15.0.1.3, 14.1.0-14.1.2.3, 13.1.0-13.1.3.4, 12.1.0-12.1.5.1, and 11.6.1-11.6.5.2 and BIG-IQ versions 5.2.0-7.0.0, the host OpenSSH servers utilize keys of less than 2048 bits which are no longer considered secure.

Understanding CVE-2020-5917

This CVE affects BIG-IP and BIG-IQ products due to the usage of insecure OpenSSH keys.

What is CVE-2020-5917?

CVE-2020-5917 highlights a vulnerability in BIG-IP and BIG-IQ versions that use weak OpenSSH keys, potentially exposing systems to security risks.

The Impact of CVE-2020-5917

The utilization of keys less than 2048 bits in OpenSSH servers can lead to security vulnerabilities, including potential Man-in-the-Middle (MitM) attacks.

Technical Details of CVE-2020-5917

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability arises from the use of inadequate key lengths in OpenSSH servers within affected versions of BIG-IP and BIG-IQ.

Affected Systems and Versions

Products: BIG-IP, BIG-IQ
Versions: BIG-IP 15.1.0-15.1.0.4, 15.0.0-15.0.1.3, 14.1.0-14.1.2.3, 13.1.0-13.1.3.4, 12.1.0-12.1.5.1, 11.6.1-11.6.5.2, BIG-IQ 5.2.0-7.0.0

Exploitation Mechanism

The vulnerability can be exploited by attackers to intercept and manipulate data transmitted over insecure OpenSSH connections.

Mitigation and Prevention

Protecting systems from CVE-2020-5917 requires immediate actions and long-term security measures.

Immediate Steps to Take

Upgrade affected systems to versions that use secure key lengths in OpenSSH servers.
Monitor network traffic for any signs of unauthorized access or MitM attacks.

Long-Term Security Practices

Implement regular security audits to identify and address vulnerabilities proactively.
Educate users on secure practices when connecting to network services.

Patching and Updates

Apply patches provided by the vendor to ensure that OpenSSH keys meet recommended security standards.