CVE-2023-36851 Junos OS: SRX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload and download arbitrary files

A Missing Authentication for Critical Function vulnerability in Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause limited impact to the file system integrity.

With a specific request to

webauth_operation.php

that doesn’t require authentication, an attacker is able to upload and download arbitrary files via J-Web, leading to a loss of

integrity or confidentiality, which may allow chaining to other vulnerabilities.

This issue affects Juniper Networks Junos OS on SRX Series:

21.2 versions prior to 21.2R3-S8;

• 21.4

versions prior to

21.4R3-S6;

• 22.1

versions prior to

22.1R3-S5;

• 22.2

versions prior to

22.2R3-S3;

• 22.3

versions prior to

22.3R3-S2;

• 22.4 versions prior to 22,4R2-S2, 22.4R3;
• 23.2 versions prior to

23.2R1-S2, 23.2R2.