CVE-2019-15801 Hardcoded credentials in n/a

High 7.5 Published 14 Nov 2019 Updated 5 Aug 2024

Attackers can decrypt hardcoded passwords to access diagnostic and recovery menus on Zyxel GS1900 switches, bypassing authentication controls.

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-2019-15801?

CVE-2019-15801 is a high-severity vulnerability in n/a, published on 14 Nov 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. The firmware image contains encrypted passwords that are used to authenticate users wishing to access a diagnostics or password-recovery menu. Using the hardcoded cryptographic key found elsewhere in the firmware, these passwords can be decrypted. This is related to fds_sys_passDebugPasswd_ret() and fds_sys_passRecoveryPasswd_ret() in libfds.so.0.0.

Weakness: CWE-798

Which versions are affected by CVE-2019-15801?

It affects 9 products.

Products include Zyxel Gs1900-10hp Firmware, Zyxel Gs1900-16 Firmware, Zyxel Gs1900-24 Firmware, Zyxel Gs1900-24e Firmware, Zyxel Gs1900-24hp Firmware, Zyxel Gs1900-48 Firmware and 3 more.

How do I fix CVE-2019-15801?

No fix has been published for CVE-2019-15801 yet. Limit exposure of the affected software until one is available.

Is CVE-2019-15801 being exploited?

There is no known exploitation of CVE-2019-15801 in the wild and no public exploit code.

Sources

Also known as GHSA-g22q-gmqw-xvw4.