CVE-2019-1984 : Exploit Details and Defense Strategies
Learn about CVE-2019-1984, a vulnerability in Cisco's NFVIS allowing attackers to overwrite OS files. Understand the impact, affected systems, exploitation, and mitigation steps.
A weakness in Cisco's Enterprise Network Functions Virtualization Infrastructure Software (NFVIS) allows an authenticated attacker with admin privileges to modify files on the OS, posing a significant security risk.
Understanding CVE-2019-1984
This CVE identifies a vulnerability in Cisco's NFVIS that could be exploited by an attacker to overwrite files on the underlying OS of a targeted device.
What is CVE-2019-1984?
The vulnerability stems from inadequate input validation in an NFVIS file-system command, enabling an attacker to manipulate variables during command execution and potentially overwrite any files on the OS.
The Impact of CVE-2019-1984
The vulnerability has a CVSS base score of 6.5, indicating a medium severity issue with high availability and integrity impact. Although no public exploits are known, successful exploitation could lead to unauthorized file modifications.
Technical Details of CVE-2019-1984
Cisco's NFVIS vulnerability involves:
Vulnerability Description
- Insufficient input validation in an NFVIS file-system command
- Potential for an attacker with admin privileges to overwrite OS files
Affected Systems and Versions
- Product: Cisco Enterprise NFV Infrastructure Software
- Versions Affected: < 3.12.1
Exploitation Mechanism
- Attacker needs to be authenticated and have admin privileges
- Manipulation of specific variables during command execution
Mitigation and Prevention
Taking immediate steps and implementing long-term security practices are crucial:
Immediate Steps to Take
- Apply vendor-provided patches or updates promptly
- Monitor network for any suspicious activities
- Restrict access to vulnerable systems
Long-Term Security Practices
- Regular security training for staff on best practices
- Implement network segmentation to limit the attack surface
- Conduct regular security audits and assessments
Patching and Updates
- Check Cisco's security advisory for patches and updates
- Ensure timely installation of security fixes to mitigate the vulnerability