Bug 1437828 (CVE-2017-18264)

Summary:	CVE-2017-18264 phpMyAdmin: Bypass $cfg['Servers'][$i]['AllowNoPassword']
Product:	[Other] Security Response	Reporter:	Martin Prpič <mprpic>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	abhgupta, ccoleman, dedgar, dmcphers, fumseckworld, jgoulding, jialiu, joelsmith, jokerman, lmeyer, mmccomas, redhat-bugzilla
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	phpMyAdmin 4.0.10.20, phpMyAdmin 4.7.0	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-21 11:52:50 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1437829, 1437830, 1437831, 1437832
Bug Blocks:

Description Martin Prpič 2017-03-31 09:24:42 UTC

A vulnerability was discovered where the restrictions caused by $cfg['Servers'][$i]['AllowNoPassword'] = false are bypassed under certain PHP versions. This can allow the login of users who have no password set even if the administrator has set $cfg['Servers'][$i]['AllowNoPassword'] to false (which is also the default).
This behavior depends on the PHP version used (it seems PHP 5 is affected, while PHP 7.0 is not).

Mitigation:

Set a password for all users.

Affected versions:

Version 4.0 prior to 4.0.10.20
Version 4.4 (no longer supported)
Version 4.6 (no longer supported)
Version 4.7.0-beta1 and 4.7.0-rc1

Upstream patches:

https://github.com/phpmyadmin/phpmyadmin
https://github.com/phpmyadmin/phpmyadmin/commit/b6ca92cc75c8a16001425be7881e73430bcc35b8
https://github.com/phpmyadmin/phpmyadmin/commit/7232271a379396ca1d4b083af051262057003c41

External References:

https://www.phpmyadmin.net/security/PMASA-2017-8/

Comment 2 Martin Prpič 2017-03-31 09:26:38 UTC

Created phpMyAdmin tracking bugs for this issue:

Affects: fedora-all [bug 1437829]
Affects: epel-all [bug 1437830]

Comment 3 Martin Prpič 2017-03-31 09:26:47 UTC

Created phpMyAdmin4 tracking bugs for this issue:

Affects: epel-5 [bug 1437831]