CVE-2024-21620

An Improper Neutralization of Input During Web Page Generation (‘Cross-site Scripting’) vulnerability in J-Web of Juniper Networks Junos OS on SRX Series and EX Series allows an attacker to construct a URL that when visited by another user enables the attacker to execute commands with the target’s permissions, including an administrator.

A specific invocation of the emit_debug_note method in webauth_operation.php will echo back the data it receives.

This issue affects Juniper Networks Junos OS on SRX Series and EX Series:

• All versions earlier than 20.4R3-S10;
• 21.2 versions earlier than 21.2R3-S8;
• 21.4 versions earlier than 21.4R3-S6;
• 22.1 versions earlier than 22.1R3-S5;
• 22.2 versions earlier than 22.2R3-S3;
• 22.3 versions earlier than 22.3R3-S2;
• 22.4 versions earlier than 22.4R3-S1;
• 23.2 versions earlier than 23.2R2;
• 23.4 versions earlier than 23.4R2.