CVE-2017-2336 ScreenOS: XSS vulnerability in ScreenOS Firewall

Critical 9.6 Published 14 Jul 2017 Updated 16 Sep 2024

Reflected XSS in Juniper ScreenOS allows attackers to inject scripts into admin sessions, enabling command execution with administrator privileges.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2017-2336?

CVE-2017-2336 is a critical cross-site scripting vulnerability in Juniper Networks ScreenOS, published on 14 Jul 2017. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

A reflected cross site scripting vulnerability in NetScreen WebUI of Juniper Networks Juniper NetScreen Firewall+VPN running ScreenOS allows a network based attacker to inject HTML/JavaScript content into the management session of other users including the administrator. This enables the attacker to effectively execute commands with the permissions of an administrator. This issue affects Juniper Networks ScreenOS 6.3.0 releases prior to 6.3.0r24 on SSG Series. No other Juniper Networks products or platforms are affected by this issue.

Weakness: CWE-79

Which versions are affected by CVE-2017-2336?

It affects 1 product.

Products include Juniper Screenos.

How do I fix CVE-2017-2336?

No fix has been published for CVE-2017-2336 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2017-2336 being exploited?

There is no known exploitation of CVE-2017-2336 in the wild and no public exploit code.

Sources

Also known as GHSA-qgvx-4g6f-j5mh.