CVE-2020-26894 : Exploit Details and Defense Strategies

LiveCode v9.6.1 on Windows allows local, low-privileged users to gain privileges by creating a malicious "cmd.exe" in the folder of the vulnerable LiveCode application.

Understanding CVE-2020-26894

This CVE identifies a privilege escalation vulnerability in LiveCode v9.6.1 on Windows.

What is CVE-2020-26894?

The vulnerability allows local, low-privileged users to elevate their privileges by placing a malicious "cmd.exe" in the application's folder. When the application uses LiveCode's "shell()" function, it inadvertently executes the malicious "cmd.exe".

The Impact of CVE-2020-26894

Exploitation of this vulnerability can lead to unauthorized privilege escalation for attackers, potentially compromising the affected system.

Technical Details of CVE-2020-26894

LiveCode v9.6.1 on Windows is susceptible to a privilege escalation vulnerability.

Vulnerability Description

The vulnerability arises from LiveCode's "shell()" function searching for and executing "cmd.exe" in the application's directory, allowing for privilege escalation.

Affected Systems and Versions

Product: LiveCode v9.6.1
Operating System: Windows
Versions: All versions prior to the patched release

Exploitation Mechanism

Attackers create a malicious "cmd.exe" in the application's folder.
When the vulnerable application uses LiveCode's "shell()" function, it executes the malicious "cmd.exe".

Mitigation and Prevention

To address CVE-2020-26894, follow these mitigation strategies:

Immediate Steps to Take

Update LiveCode to the latest patched version.
Restrict access to the application's directory to authorized users only.
Monitor system logs for any suspicious activities.

Long-Term Security Practices

Implement the principle of least privilege to restrict user permissions.
Regularly audit and review file system permissions to prevent unauthorized access.

Patching and Updates

Apply security patches and updates promptly to mitigate known vulnerabilities.