CVE-2019-11541 Explained : Impact and Mitigation

Users who utilize the SAML authentication feature with the Reuse Existing NC (Pulse) Session option in Pulse Secure Pulse Connect Secure versions 9.0RX before 9.0R3.4, 8.3RX before 8.3R7.1, and 8.2RX before 8.2R12.1 might experience authentication leaks.

Understanding CVE-2019-11541

This CVE involves potential authentication leaks in specific versions of Pulse Secure Pulse Connect Secure due to the misuse of the SAML authentication feature.

What is CVE-2019-11541?

CVE-2019-11541 is a vulnerability that affects users who employ the SAML authentication feature with the Reuse Existing NC (Pulse) Session option in certain versions of Pulse Secure Pulse Connect Secure.

The Impact of CVE-2019-11541

CVSS Base Score: 8.3 (High)
Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
Confidentiality Impact: Low
Integrity Impact: Low
Availability Impact: Low
Scope: Changed
User Interaction: None

The vulnerability could lead to authentication leaks, potentially compromising user credentials and system security.

Technical Details of CVE-2019-11541

Vulnerability Description

In Pulse Secure Pulse Connect Secure versions 9.0RX before 9.0R3.4, 8.3RX before 8.3R7.1, and 8.2RX before 8.2R12.1, users utilizing SAML authentication with the Reuse Existing NC (Pulse) Session option may encounter authentication leaks.

Affected Systems and Versions

Pulse Secure Pulse Connect Secure 9.0RX before 9.0R3.4
Pulse Secure Pulse Connect Secure 8.3RX before 8.3R7.1
Pulse Secure Pulse Connect Secure 8.2RX before 8.2R12.1

Exploitation Mechanism

The vulnerability can be exploited by attackers intercepting and manipulating SAML authentication requests, leading to unauthorized access and potential data breaches.

Mitigation and Prevention

Immediate Steps to Take

Update Pulse Secure Pulse Connect Secure to the latest patched versions.
Disable the Reuse Existing NC (Pulse) Session option if not essential for operations.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly review and update security configurations.
Conduct security training for users on best practices to prevent unauthorized access.

Patching and Updates

Apply security patches provided by Pulse Secure promptly to address the vulnerability and enhance system security.