CVE-2016-9849 Auth bypass in n/a

Critical 9.8 Published 11 Dec 2016 Updated 6 Aug 2024

Attackers can bypass root access restrictions and deny rules in phpMyAdmin by using null bytes in the username, requiring specific configuration settings.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2016-9849?

CVE-2016-9849 is a critical authentication bypass vulnerability in Phpmyadmin Phpmyadmin, published on 11 Dec 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in phpMyAdmin. It is possible to bypass AllowRoot restriction ($cfg['Servers'][$i]['AllowRoot']) and deny rules for username by using Null Byte in the username. All 4.6.x versions (prior to 4.6.5), 4.4.x versions (prior to 4.4.15.9), and 4.0.x versions (prior to 4.0.10.18) are affected.

Weakness: CWE-264

Which versions are affected by CVE-2016-9849?

It affects 1 product.

Products include Phpmyadmin Phpmyadmin.

How do I fix CVE-2016-9849?

Upgrade to a fixed version.

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

Is CVE-2016-9849 being exploited?

There is no known exploitation of CVE-2016-9849 in the wild and no public exploit code.

All Phpmyadmin Phpmyadmin vulnerabilities

Sources

Also known as ALPINE-CVE-2016-9849, CVE-2016-1000362, DEBIAN-CVE-2016-9849, GHSA-r6w3-53hv-rjhw, UBUNTU-CVE-2016-9849.