CVE-2017-3839 : Exploit Details and Defense Strategies

Cisco Secure Access Control System (ACS) has a vulnerability known as XML External Entity, potentially allowing unauthorized access to stored information.

Understanding CVE-2017-3839

The vulnerability in the web-based user interface of Cisco Secure Access Control System (ACS) could be exploited by an unauthenticated attacker to access system information.

What is CVE-2017-3839?

The vulnerability is related to XML External Entity (XXE) in the ACS web interface.
Attackers without authentication could gain access to stored data.

The Impact of CVE-2017-3839

Unauthorized individuals may access sensitive information stored on the affected system.
Risk of data breaches and unauthorized data retrieval.

Technical Details of CVE-2017-3839

The vulnerability affects Cisco Secure Access Control System (ACS) version 5.8(2.5).

Vulnerability Description

XML External Entity (XXE) vulnerability in the ACS web interface.

Affected Systems and Versions

Product: Cisco Secure Access Control System
Version: 5.8(2.5)

Exploitation Mechanism

Unauthenticated remote attackers can exploit the vulnerability to access system data.

Mitigation and Prevention

Steps to address and prevent the CVE-2017-3839 vulnerability.

Immediate Steps to Take

Apply security patches provided by Cisco.
Monitor system logs for any suspicious activities.
Restrict network access to the ACS web interface.

Long-Term Security Practices

Regularly update and patch ACS software.
Conduct security audits and vulnerability assessments.
Educate users on secure practices and awareness.

Patching and Updates

Cisco has released patches to address the vulnerability.