CVE-2022-22195 : What You Need to Know

An Improper Update of Reference Count vulnerability in the kernel of Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to trigger a counter overflow, eventually causing a Denial of Service (DoS). This vulnerability affects multiple versions of Juniper Networks Junos OS Evolved. Juniper Networks Junos OS is not affected by this issue.

Understanding CVE-2022-22195

This CVE highlights a security vulnerability in Juniper Networks Junos OS Evolved that could lead to a Denial of Service (DoS) attack.

What is CVE-2022-22195?

CVE-2022-22195 is an Improper Update of Reference Count vulnerability in Junos OS Evolved that allows an attacker to cause a counter overflow, resulting in a DoS.

The Impact of CVE-2022-22195

The vulnerability can be exploited by an unauthenticated, network-based attacker to disrupt services, potentially leading to downtime and impacting system availability.

Technical Details of CVE-2022-22195

Vulnerability Description

The vulnerability arises from a flaw in the kernel of Juniper Networks Junos OS Evolved, enabling attackers to trigger a counter overflow.

Affected Systems and Versions

Junos OS Evolved versions prior to 20.4R3-S1-EVO
Junos OS Evolved 21.1 versions prior to 21.1R3-EVO
Junos OS Evolved 21.2 versions prior to 21.2R3-EVO
Junos OS Evolved 21.3 versions prior to 21.3R2-EVO

Exploitation Mechanism

An unauthenticated, network-based attacker can exploit this vulnerability to carry out a DoS attack.

Mitigation and Prevention

Immediate Steps to Take

Update Junos OS Evolved to versions 20.4R3-S1-EVO, 21.1R3-EVO, 21.2R3-EVO, 21.3R2-EVO, 21.4R1-EVO, or subsequent releases.

Long-Term Security Practices

To mitigate the risk of exploitation, implement access lists or firewall filters to restrict access to trusted networks, hosts, and users.

Patching and Updates

Ensure timely installation of security patches and updates provided by Juniper Networks to address this vulnerability.