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CVE-2023-44204 : Exploit Details and Defense Strategies

Find detailed insights into CVE-2023-44204 affecting Junos OS and Junos OS Evolved. Learn about the impact, affected systems, exploitation mechanism, mitigation steps, and update solutions.

An in-depth look at the vulnerability in Junos OS and Junos OS Evolved that results in the rpd crashing upon receiving a malformed BGP UPDATE message.

Understanding CVE-2023-44204

This article provides detailed insights into CVE-2023-44204 affecting Junos OS and Junos OS Evolved.

What is CVE-2023-44204?

An Improper Validation of Syntactic Correctness of Input vulnerability in Routing Protocol Daemon (rpd) Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS).

The Impact of CVE-2023-44204

When a malformed BGP UPDATE packet is received over an established BGP session, the rpd crashes and restarts. This issue impacts both eBGP and iBGP implementations of Juniper Networks Junos OS and Junos OS Evolved.

Technical Details of CVE-2023-44204

Get insights into the vulnerability's description, affected systems, versions, and exploitation mechanism.

Vulnerability Description

The vulnerability allows an unauthenticated attacker to trigger a DoS by sending a malformed BGP UPDATE packet to the rpd service.

Affected Systems and Versions

        Juniper Networks Junos OS: Versions prior to 21.4R3-S4, 22.1R3-S3, 22.2R3-S2, 22.3R2-S2, 22.3R3, 22.4R2-S1, 22.4R3, 23.2R1, 23.2R2
        Juniper Networks Junos OS Evolved: Versions prior to 21.4R3-S5-EVO, 22.1R3-S3-EVO, 22.2R3-S3-EVO, 22.3R2-S2-EVO, 22.4R3-EVO, 23.2R2-EVO

Exploitation Mechanism

Juniper SIRT has not detected any malicious exploitation of this vulnerability.

Mitigation and Prevention

Learn about the immediate steps to take and long-term security practices to safeguard systems.

Immediate Steps to Take

There are no known workarounds for this issue.

Long-Term Security Practices

Update to the latest software releases provided by Juniper Networks to address the vulnerability.

Patching and Updates

The following software releases have been updated to resolve the issue:

        Junos OS: 21.4R3-S4, 22.1R3-S3, 22.2R3-S2, 22.3R2-S2, 22.3R3, 22.4R2-S1, 22.4R3, 23.1R2, 23.2R1, 23.2R2, 23.3R1
        Junos OS Evolved: 22.1R3-S3-EVO, 22.3R2-S2-EVO, 22.4R3-EVO, 23.1R2-EVO, 23.2R2-EVO, 23.3R1-EVO and subsequent releases.

For more information, refer to the Juniper Networks vendor advisory.

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