CVE-2019-18988 : Security Advisory and Response

TeamViewer Desktop up to version 14.7.1965 uses a shared AES key for different customers' installations, allowing a bypass of remote-login access control. This vulnerability has been present since at least version 7.0.43148, potentially exposing sensitive information.

Understanding CVE-2019-18988

TeamViewer Desktop vulnerability due to the use of a shared AES key for installations.

What is CVE-2019-18988?

The vulnerability in TeamViewer Desktop allows attackers to bypass remote-login access control by exploiting a shared AES key used for installations.
Attackers gaining access to the key could decrypt protected information stored in the registry or configuration files.
In older versions, attackers could decrypt the Unattended Access password, granting remote login and file browsing capabilities.

The Impact of CVE-2019-18988

Potential exposure of sensitive information stored in TeamViewer's registry or configuration files.
Risk of unauthorized remote login and access to systems.

Technical Details of CVE-2019-18988

TeamViewer Desktop vulnerability technical insights.

Vulnerability Description

Shared AES key usage in TeamViewer Desktop versions up to 14.7.1965.
Key used for OptionsPasswordAES, potentially compromising data security.

Affected Systems and Versions

TeamViewer Desktop up to version 14.7.1965.
Versions prior to v9.x also vulnerable to Unattended Access password decryption.

Exploitation Mechanism

Attackers exploiting the shared AES key to decrypt sensitive information.
Possibility of unauthorized access to systems and data.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2019-18988.

Immediate Steps to Take

Update TeamViewer Desktop to the latest version to patch the vulnerability.
Monitor for any unauthorized access or unusual activities on the system.

Long-Term Security Practices

Implement strong password policies and regularly update access credentials.
Encrypt sensitive data to prevent unauthorized access.

Patching and Updates

Regularly apply security patches and updates provided by TeamViewer to address known vulnerabilities.