Juniper Junos OS

What it is

Juniper Junos OS on EX Series and SRX Series contains a PHP external variable modification vulnerability that allows an unauthenticated, network-based attacker to control an important environment variable. Using a crafted request, which sets the variable PHPRC, an attacker is able to modify the PHP execution environment allowing the injection und execution of code.

What to do

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Vendor notices and references

• supportportal.juniper.net/s/article/2023-08-Out-of-Cycle-Security-Bulletin-Junos-OS-SRX-Se
• nvd.nist.gov/vuln/detail/CVE-2023-36845

Description and required action as published by CISA. Full record at NVD.