#VU21723 Path traversal in Juniper Junos OS - CVE-2019-0074

Vulnerability identifier: #VU21723

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-0074

CWE-ID: CWE-22

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Juniper Junos OS
Operating systems & Components / Operating system

Vendor: Juniper Networks, Inc.

Description

The vulnerability allows a local user to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences. A local authenticated user can send a specially crafted HTTP request and read arbitrary files on the system.

Note: This vulnerability affects only Junos OS on NFX150 Series, QFX10K Series, EX9200 Series, MX Series and PTX Series with Next-Generation Routing Engine (NG-RE) and vmhost.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 15.1F1 - 15.1F6, 16.1R6-S3 - 16.1R6, 17.1R1-S1 - 17.1R2, 17.2R1-S3 - 17.2R3, 17.3R1-S1 - 17.3R3, 17.4R1-S1 - 17.4R1, 18.1R1 - 18.1R2, 18.2R1-S3 - 18.2X75-D30, 18.3R1-S1 - 18.3R1, 18.4R1

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External links
https://kb.juniper.net/JSA10975

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.