CVE-2019-11508 : Security Advisory and Response

A vulnerability in Pulse Secure Pulse Connect Secure (PCS) versions before 8.1R15.1, 8.2 before 8.2R12.1, 8.3 before 8.3R7.1, and 9.0 before 9.0R3.4 allows an authenticated attacker to execute unauthorized code through Directory Traversal.

Understanding CVE-2019-11508

This CVE identifies a security flaw in Pulse Secure Pulse Connect Secure (PCS) that could lead to arbitrary code execution by an authenticated attacker.

What is CVE-2019-11508?

The vulnerability in Pulse Secure Pulse Connect Secure (PCS) versions prior to specific releases allows an attacker to exploit Directory Traversal via the admin web interface to run unauthorized code on the device.

The Impact of CVE-2019-11508

The vulnerability has a CVSS base score of 8.6, indicating a high severity level. The impact includes high confidentiality risk but no integrity impact or availability impact.

Technical Details of CVE-2019-11508

This section delves into the technical aspects of the CVE.

Vulnerability Description

The flaw enables an authenticated attacker to leverage Directory Traversal to execute arbitrary code on the Pulse Secure Pulse Connect Secure (PCS) device.

Affected Systems and Versions

Pulse Secure Pulse Connect Secure (PCS) versions before 8.1R15.1
Pulse Secure Pulse Connect Secure (PCS) versions before 8.2R12.1
Pulse Secure Pulse Connect Secure (PCS) versions before 8.3R7.1
Pulse Secure Pulse Connect Secure (PCS) versions before 9.0R3.4

Exploitation Mechanism

The attacker, authenticated via the admin web interface, can exploit Directory Traversal to execute unauthorized code on the Pulse Secure Pulse Connect Secure (PCS) device.

Mitigation and Prevention

Protecting systems from CVE-2019-11508 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Pulse Secure Pulse Connect Secure (PCS) to versions 8.1R15.1, 8.2R12.1, 8.3R7.1, or 9.0R3.4 to mitigate the vulnerability.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Regularly review and apply security patches and updates for all software and systems.
Implement strong authentication mechanisms and access controls to prevent unauthorized access.
Conduct regular security audits and penetration testing to identify and address vulnerabilities.
Educate users and administrators about cybersecurity best practices.

Patching and Updates

Ensure timely installation of security patches and updates provided by Pulse Secure to address CVE-2019-11508.