CVE-2018-7321 Explained : Impact and Mitigation

Wireshark versions 2.4.0 to 2.4.4 and 2.2.0 to 2.2.12 had a vulnerability in the epan/dissectors/packet-thrift.c file that allowed a significant loop, which was mitigated by halting the dissection process upon encountering an unexpected type.

Understanding CVE-2018-7321

This CVE entry pertains to a specific vulnerability found in Wireshark versions 2.4.0 to 2.4.4 and 2.2.0 to 2.2.12.

What is CVE-2018-7321?

The vulnerability in Wireshark versions 2.4.0 to 2.4.4 and 2.2.0 to 2.2.12 allowed for a significant loop in the epan/dissectors/packet-thrift.c file, which could be exploited by attackers.

The Impact of CVE-2018-7321

The vulnerability could potentially lead to a denial of service (DoS) scenario or other security issues due to the loop in the dissection process.

Technical Details of CVE-2018-7321

Wireshark versions 2.4.0 to 2.4.4 and 2.2.0 to 2.2.12 were affected by this vulnerability.

Vulnerability Description

The issue was caused by a loop in the epan/dissectors/packet-thrift.c file, which was resolved by stopping the dissection process upon encountering an unexpected type.

Affected Systems and Versions

Wireshark 2.4.0 to 2.4.4
Wireshark 2.2.0 to 2.2.12

Exploitation Mechanism

Attackers could exploit this vulnerability by triggering the loop in the dissection process, potentially leading to a DoS or other security risks.

Mitigation and Prevention

Steps to address and prevent the CVE-2018-7321 vulnerability.

Immediate Steps to Take

Update Wireshark to a patched version that addresses the loop issue.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

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

Patching and Updates

Ensure that all systems running affected versions of Wireshark are promptly patched with the latest updates.