CVE-2020-26575 : What You Need to Know

In Wireshark through 3.2.7, the Facebook Zero Protocol (aka FBZERO) dissector could enter an infinite loop. This was addressed by correcting the implementation of offset advancement.

Understanding CVE-2020-26575

This CVE involves a vulnerability in the Wireshark software that could lead to an infinite loop in the Facebook Zero Protocol dissector.

What is CVE-2020-26575?

The CVE-2020-26575 vulnerability in Wireshark through version 3.2.7 allows for an infinite loop in the FBZERO dissector due to incorrect offset advancement implementation.

The Impact of CVE-2020-26575

The vulnerability could potentially lead to a denial of service (DoS) condition by causing the Wireshark software to enter an infinite loop, impacting system performance and availability.

Technical Details of CVE-2020-26575

This section provides more technical insights into the CVE-2020-26575 vulnerability.

Vulnerability Description

The issue arises from the incorrect implementation of offset advancement in the Facebook Zero Protocol dissector within Wireshark versions up to 3.2.7.

Affected Systems and Versions

Wireshark versions up to 3.2.7 are affected by this vulnerability.

Exploitation Mechanism

An attacker could exploit this vulnerability by crafting a malicious FBZERO packet to trigger the infinite loop in the Wireshark dissector.

Mitigation and Prevention

Protecting systems from CVE-2020-26575 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Wireshark to version 3.2.8 or later to mitigate the vulnerability.
Monitor network traffic for any signs of exploitation.

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

Apply patches and updates provided by Wireshark to address the vulnerability and enhance software security.