#VU24186 Path traversal in Juniper Junos OS - CVE-2020-1606

Vulnerability identifier: #VU24186

Vulnerability risk: Medium

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-1606

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

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

Vendor: Juniper Networks, Inc.

Description

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

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote authenticated J-web user can send a specially crafted HTTP request and read files with "world" readable permission and delete files with "world" writeable permission.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Juniper Junos OS: 12.3R10 - 12.3, 14.1X53-D15 - 14.1x53, 15.1R - 15.1, 16.1R - 16.1, 16.2R1-S1 - 16.2, 17.1R1-S1 - 17.1, 17.2R1-S1 - 17.2, 17.3R1-S1 - 17.3, 17.4R1-S1 - 17.4, 18.1R1 - 18.1, 18.2R1-S3 - 18.2, 18.3R1-S1 - 18.3, 18.4R1-S1 - 18.4, 19.1R1-S1 - 19.1R1

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External links
https://jvn.jp/en/jp/JVN07375820/index.html
https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10985&actp=METADATA

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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