CVE-2023-2856 Explained : Impact and Mitigation

This CVE was published by GitLab on May 26, 2023, with the description of "VMS TCPIPtrace file parser crash in Wireshark 4.0.0 to 4.0.5 and 3.6.0 to 3.6.13 allows denial of service via crafted capture file".

Understanding CVE-2023-2856

This CVE involves a vulnerability in Wireshark versions 4.0.0 to 4.0.5 and 3.6.0 to 3.6.13, which could result in a denial of service attack.

What is CVE-2023-2856?

The CVE-2023-2856 vulnerability relates to a buffer over-read issue in Wireshark, specifically in the VMS TCPIPtrace file parser, which could allow an attacker to cause a denial of service through a maliciously crafted capture file.

The Impact of CVE-2023-2856

The impact of this vulnerability is rated as MEDIUM with a CVSS base score of 5.3. It requires local access with low complexity, no privileges, and user interaction is required. The confidentiality, integrity, and availability impacts are all rated as low.

Technical Details of CVE-2023-2856

This section provides more in-depth technical details about the vulnerability.

Vulnerability Description

The vulnerability in Wireshark allows an attacker to crash the application via a crafted capture file, leading to a denial of service condition.

Affected Systems and Versions

Wireshark versions 4.0.0 to 4.0.5 and 3.6.0 to 3.6.13 are affected by this vulnerability. Users using these versions are at risk of exploitation.

Exploitation Mechanism

The exploitation of this vulnerability involves an attacker providing a specially crafted capture file to trigger the buffer over-read issue, leading to a crash in Wireshark.

Mitigation and Prevention

It is crucial to take immediate steps to mitigate the risk posed by CVE-2023-2856 and prevent potential exploitation.

Immediate Steps to Take

Users are advised to update their Wireshark installations to versions that are not affected by the vulnerability.
Implement network security measures to reduce the risk of exposure to malicious capture files.

Long-Term Security Practices

Regularly update and patch software to address any known security vulnerabilities.
Follow best practices for network security and regularly conduct security assessments.

Patching and Updates

Wireshark Foundation has released security updates to address this vulnerability. Users should promptly apply the latest patches provided by the vendor to secure their systems.