CVE-2023-28967 : Vulnerability Insights and Analysis

This CVE-2023-28967 pertains to a vulnerability in Juniper Networks Junos OS and Junos OS Evolved related to the Border Gateway Protocol (BGP) software, allowing an unauthenticated attacker to trigger a Denial of Service (DoS) by crashing the Routing Protocol Daemon (RPD).

Understanding CVE-2023-28967

This vulnerability allows an attacker to exploit the BGP software in Juniper Networks Junos OS and Junos OS Evolved, leading to a DoS condition by causing the RPD to crash.

What is CVE-2023-28967?

The Use of Uninitialized Resource vulnerability in the BGP software of Juniper Networks Junos OS and Junos OS Evolved enables a network-based attacker to send specific genuine BGP packets to a device configured with BGP, resulting in a DoS by crashing the RPD. This issue impacts various versions of Junos OS and Junos OS Evolved.

The Impact of CVE-2023-28967

The impact of this vulnerability is significant as it allows unauthenticated attackers to disrupt the normal functioning of devices by causing the RPD to crash, ultimately leading to a Denial of Service condition.

Technical Details of CVE-2023-28967

This section provides detailed technical information about the vulnerability, including its description, affected systems and versions, and exploitation mechanism.

Vulnerability Description

The vulnerability arises from an issue in the BGP software of Juniper Networks Junos OS and Junos OS Evolved, allowing attackers to send specific BGP packets to crash the RPD and initiate a Denial of Service condition.

Affected Systems and Versions

Various versions of Juniper Networks Junos OS and Junos OS Evolved are affected by this vulnerability, with specific versions mentioned as susceptible to exploitation.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending genuine BGP packets to devices configured with BGP, triggering the RPD crash and causing a sustained Denial of Service condition.

Mitigation and Prevention

To address CVE-2023-28967, certain mitigation and prevention measures can be implemented to safeguard systems against potential attacks.

Immediate Steps to Take

There are no known workarounds for this vulnerability. To mitigate the risk of exploitation, adhere to common security best practices to restrict access to BGP services only to trusted systems, administrators, networks, and hosts.

Long-Term Security Practices

Implementing robust network security measures, regular security assessments, and staying informed about software updates and vulnerabilities can enhance long-term security practices.

Patching and Updates

Juniper Networks has released updated software versions to resolve the issue. Ensure that affected systems are updated to the following versions or later to mitigate the CVE-2023-28967 vulnerability:

Junos OS: 21.1R3-S5, 21.2R3-S2, 21.3R3-S2, 21.4R3, 22.1R3, 22.2R2, 22.3R1, and subsequent releases.
Junos OS Evolved: 21.4R3-EVO, 22.1R3-EVO, 22.2R2-EVO, 22.3R1-EVO, and subsequent releases.