Bug 1360135 (CVE-2016-5410)

Summary:	CVE-2016-5410 firewalld: Firewall configuration can be modified by any logged in user
Product:	[Other] Security Response	Reporter:	Huzaifa S. Sidhpurwala <huzaifas>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	anemec, security-response-team, slawomir, thoger, todoleza, twoerner
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	firewalld 0.4.3.3	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the way firewalld allowed certain firewall configurations to be modified by unauthenticated users. Any locally logged in user could use this flaw to tamper or change firewall settings.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-11-06 04:28:34 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:	1359296, 1367381
Bug Blocks:	1323912, 1360139

Description Huzaifa S. Sidhpurwala 2016-07-26 06:04:34 UTC

FirewallD provides dbus api for modification of configuration after user has been authenticated via polkit. This does not apply for 5 methods which can be called by any logged user using dbus api or firewall-cmd cli interface. Any predefined policy can be used, server or desktop.

list of concerned dbus methods in firewalld.py
addPassthrough
removePassthrough
addEntry
removeEntry
setEntries

Any locally logged in user, could use the above firewalld commands to tamper or change the firewall settings.

This flaw was introduced via the following commit:
https://github.com/t-woerner/firewalld/commit/6b9867cd5c5e2c83adeec42666521a420e59ef11

It affects all firewalld versions since 0.3.12

Comment 1 Huzaifa S. Sidhpurwala 2016-08-16 10:10:41 UTC

Created firewalld tracking bugs for this issue:

Affects: fedora-all [bug 1367381]

Comment 2 Huzaifa S. Sidhpurwala 2016-08-16 10:19:29 UTC

Public via:

http://seclists.org/oss-sec/2016/q3/291

Comment 3 Huzaifa S. Sidhpurwala 2016-08-17 03:17:19 UTC

This issue was fixed in firewalld-0.4.3.3 release:

http://www.firewalld.org/2016/08/firewalld-0-4-3-3-release/

Comment 8 errata-xmlrpc 2016-11-03 21:03:33 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2597 https://rhn.redhat.com/errata/RHSA-2016-2597.html