CVE-2023-6263 : Security Advisory and Response

This CVE involves a server spoofing vulnerability in NxCloud, a product by Network Optix, where an attacker could add a fake VMS server to NxCloud and retrieve authorization headers from legitimate users.

Understanding CVE-2023-6263

This vulnerability in NxCloud before version 23.1.0.40440 allows for the addition of a fake VMS server using the exact identification of a legitimate VMS server, potentially compromising user authorization headers.

What is CVE-2023-6263?

An issue identified by the IPVM team in Network Optix NxCloud before 23.1.0.40440 enables the addition of a fake VMS server to NxCloud by mimicking a legitimate VMS server. This can lead to the retrieval of authorization headers from genuine users when the authentic client connects to the fake VMS server.

The Impact of CVE-2023-6263

With a CVSSv3.1 base score of 8.3 (High severity), this vulnerability poses a significant risk. The attack complexity is high, requiring no privileges but user interaction. It can lead to high impacts on availability, confidentiality, and integrity of affected systems.

Technical Details of CVE-2023-6263

This section delves into the specifics of the vulnerability, including its description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability allows unauthorized entities to spoof a VMS server within NxCloud, potentially compromising user authorization data during interactions with the fake server.

Affected Systems and Versions

Network Optix NxCloud versions prior to 23.1.0.40440 are impacted by this server spoofing vulnerability.

Exploitation Mechanism

By leveraging the precise identification of a legitimate VMS server, threat actors can lure legitimate clients to connect to the fake server, leading to the unauthorized retrieval of user authorization headers.

Mitigation and Prevention

To address CVE-2023-6263, it is crucial to take immediate actions and establish long-term security practices to mitigate the risks associated with this vulnerability.

Immediate Steps to Take

Update NxCloud to version 23.1.0.40440 or newer to eliminate the server spoofing vulnerability.
Monitor network activity for any signs of unauthorized server additions or requests for authorization headers.

Long-Term Security Practices

Implement network segmentation to restrict unauthorized access to critical systems.
Conduct regular security assessments and penetration testing to identify and address potential vulnerabilities proactively.

Patching and Updates

Regularly apply security patches and updates provided by Network Optix to ensure that known vulnerabilities, such as the server spoofing issue, are promptly resolved.