CVE-2020-8036 Explained : Impact and Mitigation

CVE-2020-8036, titled 'str2tokbuf used incorrectly by print-someip.c,' involves a vulnerability in tcpdump version 4.10.0-PRE-GIT that could be exploited due to the unsafe usage of the tok2strbuf() function by the SOME/IP dissector.

Understanding CVE-2020-8036

This CVE entry highlights a specific vulnerability in tcpdump that could lead to security issues if exploited.

What is CVE-2020-8036?

The vulnerability in tcpdump version 4.10.0-PRE-GIT arises from the incorrect usage of the tok2strbuf() function by the SOME/IP dissector, potentially allowing for security breaches.

The Impact of CVE-2020-8036

The misuse of the tok2strbuf() function in tcpdump 4.10.0-PRE-GIT could result in an overread error, posing a risk to the security and integrity of affected systems.

Technical Details of CVE-2020-8036

This section delves into the technical aspects of the CVE, including the vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

The tok2strbuf() function in tcpdump 4.10.0-PRE-GIT was utilized in an unsafe manner by the SOME/IP dissector, leading to a potential security vulnerability.

Affected Systems and Versions

Product: tcpdump
Vendor: The TCPdump Group
Version: 4.10.0-PRE-GIT

Exploitation Mechanism

The vulnerability could be exploited by malicious actors leveraging the incorrect usage of the tok2strbuf() function within the SOME/IP dissector.

Mitigation and Prevention

In response to CVE-2020-8036, it is crucial to take immediate steps to mitigate the risks and implement long-term security practices.

Immediate Steps to Take

Update tcpdump to a patched version that addresses the vulnerability.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update and patch software to prevent known vulnerabilities.
Conduct security audits and assessments to identify and address potential weaknesses.

Patching and Updates

Ensure that all systems running tcpdump are regularly updated with the latest patches and security fixes to mitigate the risk of exploitation.