CVE-2023-36845

Juniper Networks Junos OS

Published 17 Aug 2023 · updated 17 Jun 2026 · Analyzed

9.8 Critical · CVSS 3.1, juniper.net

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 13 Nov 2023, with a remediation deadline of 17 Nov 2023 for US federal agencies.

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

Description

A PHP External Variable Modification vulnerability in J-Web of Juniper Networks Junos OS on EX Series and SRX Series allows an unauthenticated, network-based attacker to remotely execute code. 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. This issue affects Juniper Networks Junos OS on EX Series and SRX Series: * All versions prior to 20.4R3-S9; * 21.1 versions 21.1R1 and later; * 21.2 versions prior to 21.2R3-S7; * 21.3 versions prior to 21.3R3-S5; * 21.4 versions prior to 21.4R3-S5; * 22.1 versions prior to 22.1R3-S4; * 22.2 versions prior to 22.2R3-S2; * 22.3 versions prior to 22.3R2-S2, 22.3R3-S1; * 22.4 versions prior to 22.4R2-S1, 22.4R3; * 23.2 versions prior to 23.2R1-S1, 23.2R2.

References