CVE-2018-0218 : Security Advisory and Response
Learn about CVE-2018-0218, a vulnerability in Cisco Secure Access Control Server (ACS) version before 5.8 patch 9 that allows unauthorized remote attackers to access specific information by exploiting XML External Entities (XXE) handling.
A vulnerability in the web-based user interface of Cisco Secure Access Control Server (ACS) version before 5.8 patch 9 could allow unauthorized remote attackers to gain read access to specific information by exploiting XML External Entities (XXE) handling.
Understanding CVE-2018-0218
This CVE involves a security vulnerability in Cisco Secure Access Control Server (ACS) that could be exploited by attackers to access sensitive information.
What is CVE-2018-0218?
The vulnerability in Cisco Secure Access Control Server (ACS) version before 5.8 patch 9 allows remote attackers to obtain read access to specific information by manipulating XML files.
The Impact of CVE-2018-0218
The vulnerability could lead to unauthorized access to sensitive data stored in the affected system, posing a risk to confidentiality and potentially enabling further attacks.
Technical Details of CVE-2018-0218
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability arises from the incorrect handling of XML External Entities (XXEs) during the parsing process of XML files in Cisco Secure Access Control Server (ACS) version before 5.8 patch 9.
Affected Systems and Versions
- Product: Cisco Secure Access Control Server
- Versions: Cisco Secure Access Control Server before 5.8 patch 9
Exploitation Mechanism
To exploit this vulnerability, an attacker needs to convince the system administrator to import a manipulated XML file, triggering the unauthorized access.
Mitigation and Prevention
Protecting systems from CVE-2018-0218 requires immediate actions and long-term security measures.
Immediate Steps to Take
- Apply the necessary patch or update provided by Cisco to fix the vulnerability.
- Educate system administrators about the risks of importing untrusted XML files.
Long-Term Security Practices
- Regularly update and patch all software and systems to prevent vulnerabilities.
- Implement access controls and monitoring to detect and prevent unauthorized access attempts.
Patching and Updates
Ensure that the Cisco Secure Access Control Server is updated to version 5.8 patch 9 or later to mitigate the vulnerability.