Juniper Junos CVE-2019-0067 Denial of Service Vulnerability

Description

Juniper Junos is prone to a remote denial-of-service vulnerability. Attackers can exploit this issue to crash the affected device, denying service to legitimate users.

Technologies Affected

• Juniper Junos 16.1
• Juniper Junos 16.1R1
• Juniper Junos 16.1R2
• Juniper Junos 16.1R3
• Juniper Junos 16.1R3-S10
• Juniper Junos 16.1R3-S3
• Juniper Junos 16.1R3-S4
• Juniper Junos 16.1R3-S6
• Juniper Junos 16.1R3-S8
• Juniper Junos 16.1R3-S9
• Juniper Junos 16.1R4-S1
• Juniper Junos 16.1R4-S11
• Juniper Junos 16.1R4-S12
• Juniper Junos 16.1R4-S13
• Juniper Junos 16.1R4-S3
• Juniper Junos 16.1R4-S4
• Juniper Junos 16.1R4-S6
• Juniper Junos 16.1R4-S8
• Juniper Junos 16.1R4-S9
• Juniper Junos 16.1R5
• Juniper Junos 16.1R5-S1
• Juniper Junos 16.1R5-S3
• Juniper Junos 16.1R6
• Juniper Junos 16.2
• Juniper Junos 16.2R1
• Juniper Junos 16.2R1-S3
• Juniper Junos 16.2R1-S6
• Juniper Junos 16.2R2
• Juniper Junos 16.2R2-S2
• Juniper Junos 16.2R2-S5
• Juniper Junos 16.2R2-S6
• Juniper Junos 16.2R2-S7
• Juniper Junos 16.2R2-S8
• Juniper Junos 16.2R2-S9
• Juniper Junos 17.1
• Juniper Junos 17.1R1
• Juniper Junos 17.1R2

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.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to detect and block attacks and anomalous activity such as requests containing suspicious URI sequences. Since the webserver may log such requests, review its logs regularly.

Do not follow links provided by unknown or untrusted sources.
Web users should be cautious about following links to sites that are provided by unfamiliar or suspicious sources. Filtering HTML from emails may help remove a possible vector for transmitting malicious links to users.

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