CVE-2022-22210 : What You Need to Know
Learn about CVE-2022-22210, a NULL Pointer Dereference vulnerability in Juniper Networks Junos OS affecting QFX5000 Series and MX Series. Find out the impact, affected versions, and mitigation steps.
A NULL Pointer Dereference vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on QFX5000 Series and MX Series can be exploited by an unauthenticated adjacent attacker to cause a Denial of Service (DoS). This issue affects specific versions of Junos OS and can lead to FPC reboots.
Understanding CVE-2022-22210
This CVE involves a vulnerability in Juniper Networks Junos OS that allows for a Denial of Service attack when a specific VxLAN packet is received by the Packet Forwarding Engine.
What is CVE-2022-22210?
CVE-2022-22210 is a NULL Pointer Dereference vulnerability in Juniper Networks Junos OS that impacts QFX5000 Series and MX Series when a specific VxLAN packet is processed, potentially leading to a DoS condition.
The Impact of CVE-2022-22210
The vulnerability can be exploited by an unauthenticated attacker to crash the Layer 2 Address Learning Manager (L2ALM) process, causing FPC reboots and sustained DoS conditions.
Technical Details of CVE-2022-22210
Vulnerability Description
A NULL Pointer Dereference vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows unauthenticated adjacent attackers to trigger crashes in specific processes, impacting device availability.
Affected Systems and Versions
The vulnerability affects Junos OS versions 20.3 prior to 20.3R3-S3, 20.4 prior to 20.4R3-S2, and 21.2 prior to 21.2R2-S1 on QFX5000 Series and MX Series.
Exploitation Mechanism
When a vulnerable device receives a specific VxLAN packet, the Layer 2 Address Learning Manager (L2ALM) process crashes, leading to FPC reboots and potential DoS conditions.
Mitigation and Prevention
Immediate Steps to Take
Juniper Networks recommends updating to the patched versions: 20.3R3-S3, 20.4R3-S2, 21.2R2-S1, or later to mitigate the vulnerability.
Long-Term Security Practices
Regularly update and patch Junos OS installations to address security vulnerabilities and protect against potential exploits.
Patching and Updates
Install the recommended software releases provided by Juniper Networks to resolve the CVE-2022-22210 vulnerability.