CVE-2019-1734 : Exploit Details and Defense Strategies
Learn about CVE-2019-1734, a vulnerability in Cisco FXOS and NX-OS Software allowing unauthorized access to system files. Understand the impact, affected systems, exploitation, and mitigation steps.
Cisco FXOS and NX-OS Software Sensitive File Read Information Disclosure Vulnerability
Understanding CVE-2019-1734
This CVE involves a weakness in the implementation of a CLI diagnostic command in Cisco FXOS Software and Cisco NX-OS Software, potentially allowing an authenticated local attacker to access restricted system files.
What is CVE-2019-1734?
The vulnerability arises from inadequate verification of role-based access control (RBAC), enabling an attacker to read sensitive information by executing a specific CLI diagnostic command with manipulated parameters.
The Impact of CVE-2019-1734
- Confidentiality Impact: High
- Base Score: 5.5 (Medium Severity)
- Unauthorized access to system files could lead to further reconnaissance attacks.
Technical Details of CVE-2019-1734
This section provides detailed technical insights into the vulnerability.
Vulnerability Description
The vulnerability allows an attacker to read restricted system files by exploiting inadequate RBAC verification.
Affected Systems and Versions
- Affected Product: Cisco NX-OS Software
- Vendor: Cisco
- Affected Version: Less than 6.2(7) (unspecified)
Exploitation Mechanism
- Attacker needs to authenticate on the device
- Execute a specific CLI diagnostic command with manipulated parameters
- Exploitation grants access to read any file on the device, potentially obtaining sensitive information
Mitigation and Prevention
Protecting systems from CVE-2019-1734 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Ensure devices are updated with the latest security patches
- Monitor and restrict access to sensitive system files
- Implement strong password policies and multi-factor authentication
Long-Term Security Practices
- Regular security training for staff on identifying and reporting suspicious activities
- Conduct periodic security audits and vulnerability assessments
Patching and Updates
- Apply vendor-recommended patches promptly
- Stay informed about security advisories and updates from Cisco