GLSA 201707-03: phpMyAdmin: Security bypass

http://security.gentoo.org/

Severity:	normal
Title:	phpMyAdmin: Security bypass
Date:	07/08/2017
Bugs:	#614522
ID:	201707-03

Synopsis

A vulnerability in phpMyAdmin might allow remote attackers to bypass authentication.

Background

phpMyAdmin is a web-based management tool for MySQL databases.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
dev-db/phpmyadmin	< 4.0.10.20	>= 4.0.10.20	All supported architectures

Description

A vulnerability was discovered where the restrictions caused by “$cfg[‘Servers’][$i][‘AllowNoPassword’] = false” are bypassed under certain PHP versions. This can lead compromised user accounts, who have no passwords set, even if the administrator has set “$cfg[‘Servers’][$i][‘AllowNoPassword’]” to false (which is the default).

This behavior depends on the PHP version used (it seems PHP 5 is affected, while PHP 7.0 is not).

Impact

A remote attacker, who only needs to know the username, could bypass security restrictions and access phpMyAdmin.

Workaround

Set a password for all users.

Resolution

All phpMyAdmin 4.0.x users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose
      ">=dev-db/phpmyadmin-4.0.10.20:4.0.10.20"

All other phpMyAdmin users should upgrade to the latest version:


      # emerge --sync
      # emerge --ask --oneshot --verbose ">=dev-db/phpmyadmin-4.7.0:4.7.0"

References

PMASA-2017-8

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201707-03.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.