CVE-2020-1669 : Exploit Details and Defense Strategies
Understand the impact and mitigation of CVE-2020-1669 affecting Juniper Networks NFX350 devices running Junos OS. Learn about the affected versions and necessary preventive measures.
This CVE-2020-1669 article provides insights into the vulnerability impacting Juniper Networks NFX350 devices running Junos OS.
Understanding CVE-2020-1669
This section delves into the details of the CVE-2020-1669 vulnerability affecting Juniper Networks NFX350 devices.
What is CVE-2020-1669?
The vulnerability involves the Juniper Device Manager (JDM) container on NFX350 Series devices storing password hashes insecurely, potentially enabling attackers to brute-force decrypt the stored password hashes.
The Impact of CVE-2020-1669
The vulnerability could lead to unauthorized access and compromise of password hashes, posing a risk to the confidentiality and integrity of the affected systems.
Technical Details of CVE-2020-1669
This section outlines the technical aspects of the CVE-2020-1669 vulnerability.
Vulnerability Description
The Juniper Device Manager (JDM) container on Juniper Networks NFX350 devices stores password hashes in the world-readable file /etc/passwd, which could be exploited by attackers with local filesystem access.
Affected Systems and Versions
- Platforms: NFX350
- Product: Junos OS
- Affected Versions:
- 19.4 versions prior to 19.4R3
- 20.1 versions prior to 20.1R1-S4, 20.1R2
Exploitation Mechanism
The vulnerability has a CVSS base score of 6.3 (Medium severity) with high impact on confidentiality and integrity. Attack complexity is high, requiring low privileges and local access.
Mitigation and Prevention
Learn about the steps to mitigate and prevent security risks associated with CVE-2020-1669.
Immediate Steps to Take
- Utilize access lists or firewall filters to restrict device access to trusted hosts.
- Limit shell access to authorized system administrators only.
Long-Term Security Practices
- Regularly review and update access control policies.
- Implement secure password storage practices.
Patching and Updates
- Junos OS versions 19.4R3, 20.1R1-S4, 20.1R2, 20.2R1, and later releases have addressed this vulnerability by storing local password hashes securely.