CVE-2023-36847
Juniper Junos OS EX Series Missing Authentication for Critical Function Vulnerability
CVSS
—
No CVSS
EPSS
83.5%
p100
KEV
YES
Nov 13, 2023
Exploit Today
80
0-100
Published: — · Last modified: —
Product
Juniper / Junos OS
Vulnerability
Juniper Junos OS EX Series Missing Authentication for Critical Function Vulnerability
Added to KEV
Nov 13, 2023
Remediate by
Nov 17, 2023
Known ransomware use
No
Summary description
Juniper Junos OS on EX Series contains a missing authentication for critical function vulnerability that 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.
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Notes
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; https://nvd.nist.gov/vuln/detail/CVE-2023-36847