CVE-2018-20808 : Security Advisory and Response

A vulnerability of Cross-Site Scripting (XSS) has been discovered in the rd.cgi file of Pulse Secure Pulse Connect Secure versions 8.3RX up to 8.3R3 due to incorrect sanitization of headers. This issue does not affect version 8.1RX.

Understanding CVE-2018-20808

This CVE identifies a Cross-Site Scripting vulnerability in specific versions of Pulse Secure Pulse Connect Secure.

What is CVE-2018-20808?

CVE-2018-20808 is an XSS vulnerability found in the rd.cgi file of Pulse Secure Pulse Connect Secure versions 8.3RX up to 8.3R3, resulting from improper header sanitization.

The Impact of CVE-2018-20808

The vulnerability could allow attackers to execute malicious scripts in the context of a user's browser, potentially leading to unauthorized actions or data theft.

Technical Details of CVE-2018-20808

This section provides more technical insights into the CVE.

Vulnerability Description

Type: Cross-Site Scripting (XSS)
Location: rd.cgi file
Cause: Incorrect sanitization of headers

Affected Systems and Versions

Affected Versions: 8.3RX up to 8.3R3
Not Affected: Version 8.1RX

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts into web pages viewed by users of the affected versions.

Mitigation and Prevention

Protecting systems from CVE-2018-20808 is crucial to maintaining security.

Immediate Steps to Take

Update to a patched version (8.3R3 or newer)
Implement web application firewalls
Monitor and filter input/output data

Long-Term Security Practices

Regular security assessments and audits
Employee training on identifying and avoiding XSS attacks

Patching and Updates

Apply security patches promptly
Stay informed about security advisories and updates