CVE-2020-26118 : Security Advisory and Response

SmartBear Collaborator Server through 13.3.13302 is vulnerable to a post-authentication Java deserialization flaw via the Google Web Toolkit (GWT) API. An attacker can exploit this to execute commands on the system.

Understanding CVE-2020-26118

This CVE involves a Java deserialization vulnerability in SmartBear Collaborator Server through version 13.3.13302.

What is CVE-2020-26118?

The vulnerability arises from the UpdateMemento class in the application, which accepts serialized Java objects from users without proper sanitization. This allows an authenticated attacker to send a malicious object to the server, leading to command execution on the underlying system.

The Impact of CVE-2020-26118

The impact of this vulnerability is rated as high, with a CVSS base score of 8.8. It can result in high confidentiality, integrity, and availability impacts on the affected system.

Technical Details of CVE-2020-26118

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability allows an authenticated attacker to execute arbitrary commands on the system by sending a malicious Java object due to improper sanitization in the UpdateMemento class.

Affected Systems and Versions

SmartBear Collaborator Server through version 13.3.13302

Exploitation Mechanism

Attacker needs to be authenticated to the server
Exploits the UpdateMemento class to send a malicious Java object
Allows execution of arbitrary commands on the system

Mitigation and Prevention

Protecting systems from CVE-2020-26118 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor-supplied patches or updates
Monitor for any unauthorized access or unusual activities
Consider restricting access to the application until patched

Long-Term Security Practices

Implement secure coding practices to prevent deserialization vulnerabilities
Regularly update and patch software to address known security issues

Patching and Updates

SmartBear has likely released patches to address this vulnerability
Regularly check for updates and apply them promptly to mitigate the risk