CVE-2022-22251 Explained : Impact and Mitigation

A detailed overview of the vulnerability impacting Juniper Networks Junos OS on cSRX Series devices, allowing local attackers to elevate privileges.

Understanding CVE-2022-22251

This CVE addresses the issue of storing passwords in a recoverable format and software permissions vulnerabilities that could enable a local attacker to escalate privileges on cSRX Series devices running Juniper Networks Junos OS.

What is CVE-2022-22251?

The vulnerability in Juniper Networks Junos OS allows a low-privileged local attacker to take control of any instance of a cSRX software deployment by exploiting software permission issues and the storage of passwords in a recoverable format.

The Impact of CVE-2022-22251

This vulnerability can result in a significant impact, with a local attacker being able to elevate their privileges, potentially leading to unauthorized control over cSRX Series devices running affected versions of Junos OS.

Technical Details of CVE-2022-22251

This section dives into the specific technical aspects of the vulnerability.

Vulnerability Description

The vulnerability arises from software permission issues and the insecure storage of passwords, enabling a local attacker to exploit these weaknesses and escalate their privileges on cSRX Series devices.

Affected Systems and Versions

Juniper Networks Junos OS versions 20.2R1, 20.3R1, 20.4R1, and 21.1R1 on cSRX Series devices are impacted by this vulnerability.

Exploitation Mechanism

The vulnerability can be exploited by a local, low-privileged attacker to gain unauthorized control over cSRX software deployments through privilege escalation.

Mitigation and Prevention

In this section, you will find guidance on mitigating the risks associated with CVE-2022-22251.

Immediate Steps to Take

There are no viable workarounds available. It is recommended to restrict access to cSRX instances using access lists or firewall filters to trusted administrative networks, hosts, and users.

Long-Term Security Practices

Implementing strong access controls, regular security updates, and following best practices for secure password storage can help prevent such privilege escalation vulnerabilities.

Patching and Updates

Juniper Networks has released Junos OS 21.2R1 and subsequent versions to address this vulnerability. Customers using Docker or Kubernetes should contact JTAC for additional guidance on applying manual commands for a comprehensive fix.