Juniper Junos CVE-2019-0074 Local Directory Traversal Vulnerability

Description

Juniper Junos is prone to a local directory-traversal vulnerability. An attacker can exploit this issue using directory-traversal characters (‘…/’) to read arbitrary files that contain sensitive information or to access files outside of the restricted directory to obtain sensitive information and perform other attacks. The following versions of Junos are vulnerable. Juniper Junos 15.1F versions prior to 15.1F6-S12 Juniper Junos 16.1 versions prior to 16.1R6, 16.1R6-S6 and 16.1R7-S3 Juniper Junos 17.1 versions prior to 17.1R3 Juniper Junos 17.2 versions prior to 17.2R1-S3, 17.2R3 and 17.2R3-S1 Juniper Junos 17.3 versions prior to 17.3R1-S1, 17.3R2 and 17.3R3-S3 Juniper Junos 17.4 versions prior to 17.4R1, 17.4R1-S6, 17.4R2-S2 and 17.4R3 Juniper Junos 18.1 versions prior to 18.1R2-S4 and 18.1R3-S3 Juniper Junos 18.2 versions prior to 18.2R2 Juniper Junos 18.2X75 versions prior to 18.2X75-D40 Juniper Junos 18.3 versions prior to 18.3R1-S2 and 18.3R2 Juniper Junos 18.4 versions prior to 18.4R1-S1 and 18.4R2

Technologies Affected

• Juniper EX9200 Series
• Juniper Junos 15.1F
• Juniper Junos 16.1
• Juniper Junos 17.1
• Juniper Junos 17.2
• Juniper Junos 17.3
• Juniper Junos 17.4
• Juniper Junos 18.1
• Juniper Junos 18.2
• Juniper Junos 18.2X75
• Juniper Junos 18.3
• Juniper Junos 18.4
• Juniper MX Series
• Juniper NFX150 Series
• Juniper PTX Series
• Juniper QFX10000 Series

Recommendations

Permit local access for trusted individuals only. Where possible, use restricted environments and restricted shells.
Permit local interactive access to known and trusted individuals only. Use of restricted environments such as chroot and jail may also limit exposure to this and other latent vulnerabilities.

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