CVE-2018-20181 Explained : Impact and Mitigation

Versions of rdesktop prior to v1.8.3 have a vulnerability referred to as an Integer Underflow, leading to a Heap-Based Buffer Overflow. This can result in memory corruption and potentially allow remote code execution.

Understanding CVE-2018-20181

This CVE involves an Integer Underflow vulnerability in rdesktop versions up to v1.8.3, potentially enabling a Heap-Based Buffer Overflow.

What is CVE-2018-20181?

An Integer Underflow vulnerability in rdesktop versions up to v1.8.3
Occurs in the seamless_process() function
Can lead to a Heap-Based Buffer Overflow, causing memory corruption
Allows potential remote code execution

The Impact of CVE-2018-20181

Memory corruption due to Heap-Based Buffer Overflow
Possible remote code execution

Technical Details of CVE-2018-20181

This section provides more technical insights into the CVE.

Vulnerability Description

Integer Underflow vulnerability in rdesktop versions up to v1.8.3
Heap-Based Buffer Overflow in the seamless_process() function
Results in memory corruption and potential remote code execution

Affected Systems and Versions

Affected versions: rdesktop versions up to v1.8.3

Exploitation Mechanism

Exploitation through the seamless_process() function
Allows attackers to trigger a Heap-Based Buffer Overflow

Mitigation and Prevention

Protecting systems from CVE-2018-20181 is crucial to prevent potential exploits.

Immediate Steps to Take

Update rdesktop to version 1.8.3 or newer
Monitor for any signs of unusual activity
Implement network segmentation to limit exposure

Long-Term Security Practices

Regularly update software and apply security patches
Conduct security assessments and penetration testing

Patching and Updates

Apply patches provided by rdesktop promptly
Stay informed about security advisories and updates