#VU79690 Arbitrary file upload in Juniper Junos OS - CVE-2023-36847

Vulnerability identifier: #VU79690

Vulnerability risk: High

CVSSv4.0: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2023-36847

CWE-ID: CWE-434

Exploitation vector: Network

Exploit availability: Yes

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

Vendor: Juniper Networks, Inc.

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to missing authentication when uploading files via J-Web. A remote non-authenticated attacker can upload a malicious file and execute it on the system.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 20.4R1-S1 - 20.4, 21.2R1-S1 - 21.2R3, 21.3R1-S1 - 21.3R3, 21.4R1-S1 - 21.4R3, 22.1R1-S1 - 22.1R3, 22.2R1-S1 - 22.2R3, 22.3R1-S1 - 22.3R2, 22.4R1-S1 - 22.4R2

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External links
https://supportportal.juniper.net/JSA72300

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.