November 13, 2023 · Applied Cybernetics Group
CVE-2023-36845 — Juniper Junos OS
Juniper Junos OS EX Series and SRX Series PHP External Variable Modification Vulnerability
- Added to KEV
2023-11-13- Federal due date
2023-11-17- Vendor
- Juniper
- Product
- Junos OS
- EPSS
- 100.0th percentile (score 0.944, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2023-36845
CISA short description
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.
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.