CVE-2019-19866 Explained : Impact and Mitigation

Atos Unify OpenScape UC Web Client versions prior to V9 R4.31.0 and V10 R0.6.0 have a security vulnerability that allows remote attackers to access confidential information through the JSON API.

Understanding CVE-2019-19866

This CVE identifies a security issue in Atos Unify OpenScape UC Web Client versions V9 and V10 that can be exploited by attackers to obtain sensitive data.

What is CVE-2019-19866?

The vulnerability in Atos Unify OpenScape UC Web Client versions V9 and V10 allows remote attackers to access confidential information by exploiting the JSON API.

The Impact of CVE-2019-19866

Attackers can use the vulnerability to iterate the conferenceId value in the getMailFunction of the JSON API, gaining access to details of all scheduled conferences on the platform, including conference numbers and access PINs.

Technical Details of CVE-2019-19866

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability in Atos Unify OpenScape UC Web Client versions V9 and V10 enables remote attackers to obtain sensitive information by iterating the conferenceId value in the JSON API.

Affected Systems and Versions

Atos Unify OpenScape UC Web Client versions prior to V9 R4.31.0
Atos Unify OpenScape UC Web Client versions prior to V10 R0.6.0

Exploitation Mechanism

Attackers exploit the JSON API's getMailFunction by iterating the conferenceId value to access details of all scheduled conferences, including conference numbers and access PINs.

Mitigation and Prevention

Protecting systems from this vulnerability requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Atos Unify OpenScape UC Web Client to versions V9 R4.31.0 or V10 R0.6.0 to mitigate the vulnerability.
Monitor and restrict access to the JSON API to prevent unauthorized exploitation.

Long-Term Security Practices

Regularly review and update security configurations and access controls.
Conduct security assessments and penetration testing to identify and address vulnerabilities.

Patching and Updates

Apply patches and updates provided by Atos for the OpenScape UC Web Client to address security issues and enhance system protection.