CVE-2017-2338 ScreenOS: XSS vulnerability in ScreenOS Firewall

High 8.4 Published 14 Jul 2017 Updated 16 Sep 2024

A persistent XSS in Juniper ScreenOS allows lower-privileged users to inject scripts into admin sessions, enabling privilege escalation and command execution.

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

What is CVE-2017-2338?

CVE-2017-2338 is a high-severity cross-site scripting vulnerability in Juniper Networks ScreenOS, published on 14 Jul 2017. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

A persistent cross site scripting vulnerability in NetScreen WebUI of Juniper Networks Juniper NetScreen Firewall+VPN running ScreenOS allows a user with the 'security' role to inject HTML/JavaScript content into the management session of other users including the administrator. This enables the lower-privileged user 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-2017-2338?

It affects 1 product.

Products include Juniper Screenos.

How do I fix CVE-2017-2338?

No fix has been published for CVE-2017-2338 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-2017-2338 being exploited?

There is no known exploitation of CVE-2017-2338 in the wild and no public exploit code.

Sources

Also known as GHSA-pw6c-8vcv-7fmm.