CVE-2022-22196 Explained : Impact and Mitigation
Learn about CVE-2022-22196 affecting Juniper Networks Junos OS and Junos OS Evolved, leading to a Denial of Service (DoS) attack. Find out the impact, affected versions, and mitigation steps.
An Improper Check for Unusual or Exceptional Conditions vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS). The rpd CPU spikes to 100% after receiving a malformed ISIS TLV, leading to processing issues of routing updates. This impacts various versions of Junos OS and Junos OS Evolved.
Understanding CVE-2022-22196
This CVE describes a vulnerability in Juniper Networks Junos OS and Junos OS Evolved that could result in a Denial of Service attack when exploited by an unauthenticated adjacent attacker.
What is CVE-2022-22196?
CVE-2022-22196 is an Improper Check for Unusual or Exceptional Conditions vulnerability that affects Juniper Networks Junos OS and Junos OS Evolved, allowing attackers to disrupt the service by causing the rpd CPU to spike to 100%.
The Impact of CVE-2022-22196
The vulnerability can be exploited by an adjacent, unauthenticated attacker with an established ISIS adjacency to trigger a Denial of Service condition by sending a malformed ISIS TLV, impacting the processing of routing updates.
Technical Details of CVE-2022-22196
The vulnerability is rated with a CVSS base score of 6.5, indicating a medium severity issue with high availability impact. It requires low attack complexity and has an attack vector of ADJACENT_NETWORK.
Vulnerability Description
The vulnerability arises in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved due to improper handling of unusual conditions, leading to the rpd CPU spiking to 100% after receiving a malformed ISIS TLV.
Affected Systems and Versions
Various versions of Junos OS and Junos OS Evolved are impacted, with specific versions being vulnerable to this issue while others remain unaffected.
Exploitation Mechanism
An adjacent, unauthenticated attacker with an established ISIS adjacency can exploit the vulnerability by sending a malformed ISIS TLV to the affected systems, causing the rpd CPU to spike to 100%.
Mitigation and Prevention
To address CVE-2022-22196, it is crucial to apply the recommended solutions provided by Juniper Networks.
Immediate Steps to Take
Update the affected software versions with the latest releases provided by Juniper Networks to mitigate the vulnerability and prevent potential exploitation.
Long-Term Security Practices
Ensure timely updates of Junos OS and Junos OS Evolved to protect against known vulnerabilities and enhance the overall security posture of the network infrastructure.
Patching and Updates
Juniper Networks has released updated software versions to address CVE-2022-22196. It is essential to upgrade to the patched releases to eliminate the risk of a Denial of Service attack.