CVE-2023-36847

/// Technical description

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

With a specific request to installAppPackage.php that doesn't require authentication an attacker is able to upload arbitrary files via J-Web, leading to a loss of

integrity

for a certain

part of the file system, which may allow chaining to other vulnerabilities.

This issue affects Juniper Networks Junos OS on EX Series:

* All versions prior to 20.4R3-S8;

* 21.1 versions 21.1R1 and later;

* 21.2 versions prior to 21.2R3-S6;

* 21.3 versions

prior to

21.3R3-S5;

* 21.4 versions

prior to

21.4R3-S4;

* 22.1 versions

prior to

22.1R3-S3;

* 22.2 versions

prior to

22.2R3-S1;

* 22.3 versions

prior to

22.3R2-S2, 22.3R3;

* 22.4 versions

prior to

22.4R2-S1, 22.4R3.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References