CVE-2022-22177 : Vulnerability Insights and Analysis

A release of illegal memory vulnerability in the snmpd daemon of Juniper Networks Junos OS, Junos OS Evolved allows an attacker to halt the snmpd daemon causing a sustained Denial of Service (DoS) to the service until it is manually restarted.

Understanding CVE-2022-22177

This vulnerability affects Junos OS and Junos OS Evolved versions, potentially leading to a Denial of Service condition.

What is CVE-2022-22177?

The vulnerability in the snmpd daemon of Junos OS and Junos OS Evolved can be exploited by an attacker to trigger a DoS attack by causing the service to shut down until manually restarted.

The Impact of CVE-2022-22177

This vulnerability could result in a prolonged denial of SNMP service availability, affecting system monitoring and management.

Technical Details of CVE-2022-22177

Vulnerability Description

The vulnerability results from an illegal memory release, leading to the snmpd daemon crashing upon receiving a specific number of crafted packets.

Affected Systems and Versions

Juniper Networks Junos OS versions prior to 12.3R12-S20, 15.1R7-S11, 18.3R3-S6, and others mentioned in the data.
Juniper Networks Junos OS Evolved versions prior to 21.3R2-EVO.

Exploitation Mechanism

There have been no reported instances of malicious exploitation of this vulnerability by Juniper SIRT.

Mitigation and Prevention

Immediate Steps to Take

Update to the recommended software releases to address the vulnerability.

Long-Term Security Practices

Configure SNMP security settings to limit access to trusted devices only.
Implement source and destination IP filter rules and use Read Only communities where possible.

Patching and Updates

Apply the following software releases to resolve the issue:

For Junos OS: 12.3R12-S20, 15.1R7-S11, 18.3R3-S6, and others listed.
For Junos OS Evolved: 21.2R3-EVO, 21.3R2-EVO, and subsequent releases.

Reference: Juniper Networks Advisory