CVE-2023-2858 : Security Advisory and Response

This CVE-2023-2858 relates to a vulnerability in Wireshark versions 4.0.0 to 4.0.5 and 3.6.0 to 3.6.13, allowing a denial of service attack via a crafted capture file.

Understanding CVE-2023-2858

This section will delve into the details of CVE-2023-2858, its impact, technical description, affected systems, exploitation mechanism, and mitigation techniques.

What is CVE-2023-2858?

CVE-2023-2858 is a vulnerability found in the NetScaler file parser within Wireshark versions 4.0.0 to 4.0.5 and 3.6.0 to 3.6.13. It enables an attacker to launch a denial of service attack by using a specially crafted capture file.

The Impact of CVE-2023-2858

The impact of this vulnerability is rated as MEDIUM, with an overall base score of 5.3. The attack complexity is low, and user interaction is required, resulting in a low impact on confidentiality, integrity, and availability.

Technical Details of CVE-2023-2858

In this section, we will explore the technical aspects of CVE-2023-2858, including its vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability in Wireshark versions 4.0.0 to 4.0.5 and 3.6.0 to 3.6.13 allows for a NetScaler file parser crash, leading to a denial of service through a maliciously crafted capture file.

Affected Systems and Versions

The impacted system includes Wireshark, specifically versions greater than or equal to 4.0.0 and less than 4.0.6, as well as versions greater than or equal to 3.6.0 and less than 3.6.14.

Exploitation Mechanism

Attackers can exploit this vulnerability by creating a specially crafted capture file which, when processed by Wireshark, triggers the NetScaler file parser crash, resulting in a denial of service condition.

Mitigation and Prevention

In this final section, we will discuss the steps to mitigate and prevent exploitation of CVE-2023-2858, ensuring the security of affected systems.

Immediate Steps to Take

Organizations should update Wireshark to versions 4.0.6 or 3.6.14, which contain patches addressing this vulnerability.
Implement network segmentation and access controls to limit exposure to potentially malicious capture files.

Long-Term Security Practices

Regularly update software and network monitoring tools to ensure the latest security patches are applied promptly.
Train employees on best practices for handling suspicious files and network traffic.

Patching and Updates

Stay informed about security advisories from Wireshark and related vendors to promptly apply patches for known vulnerabilities.
Monitor security mailing lists and advisories for any updates or alerts related to Wireshark security issues.