CVE-2018-20174 : Exploit Details and Defense Strategies

This CVE involves an Out-Of-Bounds Read vulnerability in rdesktop versions up to v1.8.3, specifically in the function ui_clip_handle_data(), potentially leading to an information leak.

Understanding CVE-2018-20174

This CVE, published on March 15, 2019, highlights a security issue in rdesktop versions up to v1.8.3.

What is CVE-2018-20174?

The function ui_clip_handle_data() in rdesktop versions up to v1.8.3 has an Out-Of-Bounds Read vulnerability, which can result in an information leak.

The Impact of CVE-2018-20174

The vulnerability could allow attackers to read beyond the allocated memory, potentially exposing sensitive information.

Technical Details of CVE-2018-20174

This section delves into the technical aspects of the CVE.

Vulnerability Description

rdesktop versions up to and including v1.8.3 contain an Out-Of-Bounds Read in the function ui_clip_handle_data(), leading to an information leak.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: Up to and including v1.8.3

Exploitation Mechanism

The vulnerability can be exploited by manipulating the data handled by the ui_clip_handle_data() function.

Mitigation and Prevention

To address CVE-2018-20174, consider the following steps:

Immediate Steps to Take

Update rdesktop to a version beyond v1.8.3, where the vulnerability is patched.
Monitor vendor advisories for security patches and updates.

Long-Term Security Practices

Regularly update software to the latest versions to mitigate known vulnerabilities.
Implement network segmentation and access controls to limit exposure to potential attacks.
Conduct regular security assessments and penetration testing to identify and address security gaps.

Patching and Updates

Apply security patches promptly to ensure systems are protected against known vulnerabilities.