CVE-2020-26422 : Vulnerability Insights and Analysis

Wireshark 3.4.0 to 3.4.1 is affected by a buffer overflow vulnerability in the QUIC dissector, allowing denial of service through packet injection or crafted capture files.

Understanding CVE-2020-26422

This CVE involves a buffer overflow issue in Wireshark versions 3.4.0 to 3.4.1, impacting the QUIC dissector.

What is CVE-2020-26422?

The vulnerability in Wireshark 3.4.0 to 3.4.1 enables attackers to disrupt services by injecting malicious packets or using manipulated capture files.

The Impact of CVE-2020-26422

CVSS Base Score: 3.7 (Low Severity)
Attack Vector: Network
Attack Complexity: High
Availability Impact: Low
No Confidentiality or Integrity Impact
No User Interaction or Privileges Required

Technical Details of CVE-2020-26422

Wireshark's buffer overflow vulnerability in the QUIC dissector has the following technical aspects:

Vulnerability Description

The flaw allows for a classic buffer overflow, triggered by inadequate input size validation in Wireshark.

Affected Systems and Versions

Affected Product: Wireshark
Vendor: The Wireshark Foundation
Affected Versions: >=3.4.0, <3.4.2

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting packets or using specially crafted capture files to cause denial of service.

Mitigation and Prevention

To address CVE-2020-26422, consider the following steps:

Immediate Steps to Take

Update Wireshark to version 3.4.2 or newer to mitigate the vulnerability.
Avoid opening suspicious capture files or network traffic.

Long-Term Security Practices

Regularly update software and security patches to prevent known vulnerabilities.
Implement network monitoring to detect unusual traffic patterns.

Patching and Updates

Stay informed about security advisories from Wireshark and related vendors.
Apply patches promptly to secure systems against potential threats.