CVE-2022-22183 : Security Advisory and Response
Learn about CVE-2022-22183, an Improper Access Control vulnerability in Juniper Networks Junos OS Evolved allowing a remote attacker to cause a CPU Denial of Service. Find out the impacted systems, mitigation steps, and more.
An Improper Access Control vulnerability in Juniper Networks Junos OS Evolved allows a network-based unauthenticated attacker to cause a Denial of Service (DoS) condition. This vulnerability affects Junos OS Evolved versions prior to 20.4R3-S2-EVO, 21.1R3-S1-EVO, 21.2R3-EVO, 21.3R2-EVO, 21.4R2-EVO.
Understanding CVE-2022-22183
This CVE involves a remote attacker causing a CPU Denial of Service by sending genuine traffic to a device on a specific IPv4 port.
What is CVE-2022-22183?
An Improper Access Control vulnerability in Juniper Networks Junos OS Evolved allows an unauthenticated attacker to create a DoS condition by overwhelming the targeted device's CPU with traffic.
The Impact of CVE-2022-22183
The vulnerability poses a high risk, with a CVSS base score of 7.5 (High severity). An attacker could exploit this vulnerability to cause a sustained DoS condition.
Technical Details of CVE-2022-22183
Vulnerability Description
The vulnerability allows attackers to consume all resources of the target CPU, leading to a DoS condition by sending traffic to a specific IPv4 port.
Affected Systems and Versions
Junos OS Evolved 20.4 versions before 20.4R3-S2-EVO, 21.1 versions before 21.1R3-S1-EVO, 21.2 versions before 21.2R3-EVO, 21.3 versions before 21.3R2-EVO, 21.4 versions before 21.4R2-EVO are affected.
Exploitation Mechanism
There is no known malicious exploitation of this vulnerability by Juniper SIRT.
Mitigation and Prevention
Immediate Steps to Take
Customers are advised to update to the fixed software releases which include: 20.4R3-S2-EVO, 21.1R3-S1-EVO, 21.2R3-EVO, 21.3R2-EVO, 21.4R2-EVO, 22.1R1-EVO, and all subsequent releases.
Long-Term Security Practices
To reduce the risk of exploitation, enabling loopback firewall filters to drop unnecessary connections and traffic from untrusted networks and devices is recommended.
Patching and Updates
There are no workarounds available for this issue. It is essential to apply the provided software updates promptly.