CVE-2020-25862 : Vulnerability Insights and Analysis

Wireshark versions 3.2.0 to 3.2.6, 3.0.0 to 3.0.13, and 2.6.0 to 2.6.20 are affected by a vulnerability in the TCP dissector that could lead to a crash. The issue has been resolved by modifying the handling of the invalid 0xFFFF checksum.

Understanding CVE-2020-25862

This CVE entry pertains to a specific vulnerability found in Wireshark versions 3.2.0 to 3.2.6, 3.0.0 to 3.0.13, and 2.6.0 to 2.6.20.

What is CVE-2020-25862?

CVE-2020-25862 is a vulnerability in the TCP dissector of Wireshark that could result in a crash due to improper handling of the 0xFFFF checksum.

The Impact of CVE-2020-25862

The vulnerability could be exploited by an attacker to cause a denial of service (DoS) by crashing the Wireshark application.

Technical Details of CVE-2020-25862

Wireshark's TCP dissector vulnerability is described below:

Vulnerability Description

The issue arises from the mishandling of the 0xFFFF checksum, leading to a crash in Wireshark.

Affected Systems and Versions

Wireshark versions 3.2.0 to 3.2.6
Wireshark versions 3.0.0 to 3.0.13
Wireshark versions 2.6.0 to 2.6.20

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specially crafted network packets to the Wireshark application, triggering a crash.

Mitigation and Prevention

To address CVE-2020-25862, consider the following steps:

Immediate Steps to Take

Update Wireshark to the latest patched version.
Avoid opening suspicious or untrusted network captures.

Long-Term Security Practices

Regularly update Wireshark and other software to patch known vulnerabilities.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

Ensure that Wireshark is regularly updated to the latest version to mitigate the risk of known vulnerabilities.