CVE-2023-28985 : What You Need to Know

This CVE-2023-28985 pertains to an Improper Validation of Syntactic Correctness of Input vulnerability in Juniper Networks' SRX Series and MX Series. The vulnerability allows an unauthenticated, network-based attacker to trigger a Denial of Service (DoS) attack, potentially causing a sustained DoS condition.

Understanding CVE-2023-28985

This section delves deeper into the details of CVE-2023-28985.

What is CVE-2023-28985?

The vulnerability involves an issue in the Intrusion Detection and Prevention (IDP) feature of Juniper Networks SRX Series and MX Series. When IDP policy is enabled to inspect HTTPS traffic, an attacker can exploit the vulnerability to cause a DoS attack.

The Impact of CVE-2023-28985

The vulnerability can lead to a sustained Denial of Service condition. Specifically, the receipt of a specific malformed SSL packet can crash the SSL detector, resulting in an FPC core on all SRX Series and MX Series devices where IDP is enabled.

Technical Details of CVE-2023-28985

This section provides in-depth technical information about CVE-2023-28985.

Vulnerability Description

The vulnerability arises from the improper validation of input in the IDP of Juniper Networks SRX Series and MX Series, allowing unauthorized network-based attackers to exploit it for a DoS attack.

Affected Systems and Versions

Juniper Networks SRX Series and MX Series devices are affected by this vulnerability prior to SigPack 3598.

Exploitation Mechanism

For the vulnerability to be exploited, IDP policy must be enabled on SRX and MX Series devices to inspect HTTPS traffic, making them susceptible to the specific malformed SSL packet causing the SSL detector to crash.

Mitigation and Prevention

This section outlines steps to mitigate and prevent the exploitation of CVE-2023-28985.

Immediate Steps to Take

Users are advised to update their systems to SigPack 3598 or later versions to address this specific vulnerability.

Long-Term Security Practices

Implementing a robust security policy and keeping systems up to date with the latest software releases can help mitigate such vulnerabilities in the long term.

Patching and Updates

Juniper Networks has released software updates starting from SigPack 3598 and subsequent releases to address the vulnerability.

Remember, staying vigilant about security updates and patches is crucial to safeguarding your systems from potential threats.