CVE-2020-6871 Auth bypass in <R5300G4?R8500G4?R5500G4>

Critical 9.8 Published 20 Jul 2020 Updated 4 Aug 2024

Attackers can bypass authentication in ZTE server management software to execute high-level commands, requiring immediate patching.

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-2020-6871?

CVE-2020-6871 is a critical authentication bypass vulnerability in <R5300G4?R8500G4?R5500G4>, published on 20 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The server management software module of ZTE has an authentication issue vulnerability, which allows users to skip the authentication of the server and execute some commands for high-level users. This affects: <R5300G4V03.08.0100/V03.07.0300/V03.07.0200/V03.07.0108/V03.07.0100/V03.05.0047/V03.05.0046/V03.05.0045/V03.05.0044/V03.05.0043/V03.05.0040/V03.04.0020;R8500G4V03.07.0103/V03.07.0101/V03.06.0100/V03.05.0400/V03.05.0020;R5500G4V03.08.0100/V03.07.0200/V03.07.0100/V03.06.0100>

Weakness: CWE-287

Which versions are affected by CVE-2020-6871?

It affects 3 products.

Products include Zte R5300g4 Firmware, Zte R5500g4 Firmware, Zte R8500g4 Firmware.

How do I fix CVE-2020-6871?

No fix has been published for CVE-2020-6871 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-2020-6871 being exploited?

There is no known exploitation of CVE-2020-6871 in the wild and no public exploit code.

CVE-2020-6872 Cross-site scripting in <R5300G4?R8500G4?R5500G4> Medium 6.1

Sources

Also known as GHSA-8848-7789-w387.