1. Home
  2. Mapping Frameworks
  3. Known Exploited Vulnerabilities Home
  4. Juniper Junos OS EX Series Missing Authentication for Critical Function Vulnerability

Known Exploited Vulnerabilities CVE-2023-36847 Mappings

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.

Mappings

Capability ID Capability Description Mapping Type ATT&CK ID ATT&CK Name Notes
CVE-2023-36847 Juniper Junos OS EX Series Missing Authentication for Critical Function Vulnerability primary_impact T1059 Command and Scripting Interpreter
Comments
This vulnerability is exploited through a Missing Authentication for Critical Function weakness in Juniper Networks Junos OS on EX Series devices. Attackers leverage this vulnerability to impact file system integrity by sending a crafted request to the `installAppPackage.php` endpoint, which does not require authentication. This manipulation allows the upload of arbitrary files via J-Web, leading to a loss of integrity for a certain part of the file system and enabling attackers to chain this vulnerability with others, potentially leading to further exploitation.
References
  1. https://supportportal.juniper.net/s/article/2023-08-Out-of-Cycle-Security-Bulletin-Junos-OS-SRX-Series-and-EX-Series-Multiple-vulnerabilities-in-J-Web-can-be-combined-to-allow-a-preAuth-Remote-Code-Execution?language=en_US
CVE-2023-36847 Juniper Junos OS EX Series Missing Authentication for Critical Function Vulnerability exploitation_technique T1190 Exploit Public-Facing Application
Comments
This vulnerability is exploited through a Missing Authentication for Critical Function weakness in Juniper Networks Junos OS on EX Series devices. Attackers leverage this vulnerability to impact file system integrity by sending a crafted request to the `installAppPackage.php` endpoint, which does not require authentication. This manipulation allows the upload of arbitrary files via J-Web, leading to a loss of integrity for a certain part of the file system and enabling attackers to chain this vulnerability with others, potentially leading to further exploitation.
References
  1. https://supportportal.juniper.net/s/article/2023-08-Out-of-Cycle-Security-Bulletin-Junos-OS-SRX-Series-and-EX-Series-Multiple-vulnerabilities-in-J-Web-can-be-combined-to-allow-a-preAuth-Remote-Code-Execution?language=en_US