CVE-2021-0248 : Security Advisory and Response

A detailed overview of CVE-2021-0248 highlighting the impact, technical details, mitigation, and prevention strategies.

Understanding CVE-2021-0248

This CVE pertains to hard-coded credentials in Juniper Networks Junos OS on NFX Series devices, allowing attackers to compromise NFX deployments through administrative interfaces.

What is CVE-2021-0248?

The vulnerability arises from the use of hard-coded credentials in Juniper Networks Junos OS, enabling unauthorized individuals to take control of NFX Series instances via administrative interfaces.

The Impact of CVE-2021-0248

With a CVSSv3.1 base score of 10 (Critical), the vulnerability poses a high risk to confidentiality, integrity, and availability. It can be exploited by attackers with network access, resulting in potential system compromise.

Technical Details of CVE-2021-0248

This section provides insights into the vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

The issue affects Juniper Networks Junos OS versions before 19.1R1 on NFX Series devices. It allows threat actors to exploit hard-coded credentials through administrative interfaces.

Affected Systems and Versions

The vulnerable platforms include NFX Series devices running Junos OS versions less than 19.1R1.

Exploitation Mechanism

The vulnerability can be exploited through administrative interfaces on NFX Series devices, potentially leading to a complete compromise of affected instances.

Mitigation and Prevention

Learn about the immediate steps to take, long-term security practices, and the importance of patching and updates.

Immediate Steps to Take

As no workarounds are currently available, it is crucial to restrict access to administrative interfaces using access lists or firewall filters to limit exposure.

Long-Term Security Practices

Implement robust security policies, conduct regular security assessments, and stay informed about software updates and security advisories.

Patching and Updates

Juniper Networks has released software updates starting from version 19.1R1 to address this specific vulnerability. Ensure timely patching to mitigate the risk of exploitation.