CVE-2018-15557 Auth bypass in n/a

High 8.8 Published 27 Jun 2019 Updated 5 Aug 2024

Attackers can gain root access by connecting to a specific IP and port via Telnet, bypassing authentication on the device.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2018-15557?

CVE-2018-15557 is a high-severity authentication bypass vulnerability in n/a, published on 27 Jun 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

An issue was discovered in the Quantenna WiFi Controller on Telus Actiontec WEB6000Q v1.1.02.22 devices. An attacker can statically set his/her IP to anything on the 169.254.1.0/24 subnet, and obtain root access by connecting to 169.254.1.2 port 23 with telnet/netcat.

Weakness: CWE-269

Which versions are affected by CVE-2018-15557?

It affects 1 product.

Products include Actiontec Web6000q Firmware.

How do I fix CVE-2018-15557?

No fix has been published for CVE-2018-15557 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2018-15557 being exploited?

There is no known exploitation of CVE-2018-15557 in the wild and no public exploit code.

Sources

Also known as GHSA-cr8p-pv2x-8ph2.