CVE-2018-20334 Command injection in n/a

Critical 9.8 Published 20 Mar 2020 Updated 5 Aug 2024

Attackers can execute arbitrary commands on ASUS routers via shell metacharacters in the fb_email parameter, gaining full control.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2018-20334?

CVE-2018-20334 is a critical command injection vulnerability in n/a, published on 20 Mar 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in ASUSWRT 3.0.0.4.384.20308. When processing the /start_apply.htm POST data, there is a command injection issue via shell metacharacters in the fb_email parameter. By using this issue, an attacker can control the router and get shell.

Weakness: CWE-78

Which versions are affected by CVE-2018-20334?

It affects 1 product.

Products include Asus Asuswrt.

How do I fix CVE-2018-20334?

No fix has been published for CVE-2018-20334 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2018-20334 being exploited?

There is no known exploitation of CVE-2018-20334 in the wild and no public exploit code.

Sources

Also known as GHSA-xgrv-mpr3-8pg9.