Juniper Junos CVE-2019-0054 Certificate Validation Security Weakness

Description

Juniper Junos is prone to a security weakness. An attacker can exploit this issue to perform man-in-the-middle attacks and perform certain unauthorized actions, which will aid in further attacks. Juniper Networks Junos OS 15.1X49 versions prior to 15.1X49-D120 are vulnerable.

Technologies Affected

• Juniper Junos 15.1X49
• Juniper Junos 15.1X49-D10
• Juniper Junos 15.1X49-D100
• Juniper Junos 15.1X49-D101
• Juniper Junos 15.1X49-D110
• Juniper Junos 15.1X49-D15
• Juniper Junos 15.1X49-D20
• Juniper Junos 15.1X49-D30
• Juniper Junos 15.1X49-D35
• Juniper Junos 15.1X49-D40
• Juniper Junos 15.1X49-D60
• Juniper Junos 15.1X49-D70
• Juniper Junos 15.1X49-D80
• Juniper Junos 15.1X49-D90

Recommendations

Block external access at the network boundary, unless external parties require service.
If global access isn’t needed, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of successful exploits.

Run all software as a nonprivileged user with minimal access rights.
To reduce the impact of latent vulnerabilities, always run nonadministrative software as an unprivileged user with minimal access rights.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity including unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.

Updates are available. Please see the references or vendor advisory for more information.