Junos OS: J-Web can be compromised through reflected client-side HTTP parameter pollution attacks.

Summary

The improper handling of client-side parameters in J-Web of Juniper Networks Junos OS allows an attacker to perform a number of different malicious actions against a target device when a user is authenticated to J-Web. An attacker may be able to supersede existing parameters, including hardcoded parameters within the HTTP/S session, access and exploit variables, bypass web application firewall rules or input validation mechanisms, and otherwise alter and modify J-Web's normal behavior. An attacker may be able to transition victims to malicious web services, or exfiltrate sensitive information from otherwise secure web forms. This issue affects: Juniper Networks Junos OS: All versions prior to 17.4R3-S3; 18.1 versions prior to 18.1R3-S12; 18.2 versions prior to 18.2R3-S6; 18.3 versions prior to 18.3R3-S4; 18.4 versions prior to 18.4R3-S6; 19.1 versions prior to 19.1R3-S4; 19.2 versions prior to 19.2R3-S1; 19.3 versions prior to 19.3R3-S1; 19.4 versions prior to 19.4R2-S2, 19.4R3; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R2.

Timeline

1. Apr 22, 2021, 7:37 PM UTCCVE published
2. Sep 17, 2024, 1:12 AM UTCRecord last updated

Affected versions

• Juniper Networks Junos OS

  fixed in 17.4R3-S3; From 18.1 · fixed in 18.1R3-S12; From 18.2 · fixed in 18.2R3-S6; From 18.3 · fixed in 18.3R3-S4; From 18.4 · fixed in 18.4R3-S6; From 19.1 · fixed in 19.1R3-S4; From 19.2 · fixed in 19.2R3-S1; From 19.3 · fixed in 19.3R3-S1; From 20.1 · fixed in 20.1R2; From 20.2 · fixed in 20.2R2

References 1