Bug 1565992 – CVE-2018-1106 PackageKit: authentication bypass allows to install signed packages without administrator privileges

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Bug 1565992 - (CVE-2018-1106) CVE-2018-1106 PackageKit: authentication bypass allows to install signed packages without administrator privileges

Summary:	CVE-2018-1106 PackageKit: authentication bypass allows to install signed pack...

Status:	CLOSED ERRATA

Aliases:	CVE-2018-1106

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20180423:1400,...
Keywords:	Security

Depends On:	1570872 1566425 1566426
Blocks:	1565197
	Show dependency tree / graph

Reported:	2018-04-11 05:36 EDT by Riccardo Schirone
Modified:	2018-04-26 04:07 EDT (History)
CC List:	7 users (show)

See Also:
Fixed In Version:	PackageKit 1.1.10
Doc Type:	If docs needed, set a value
Doc Text:	An authentication bypass flaw has been found in PackageKit that allows users without administrator privileges to install signed packages. A local attacker can use this vulnerability to install vulnerable packages to further compromise a system.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2018-04-26 04:07:47 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2018:1224	None	None	None	2018-04-24 14:32 EDT

Groups: None (edit)

Description Riccardo Schirone 2018-04-11 05:36:40 EDT

An authentication bypass flaw has been found in PackageKit since version 1.0.2.
A local attacker can bypass the authentication in
pk_transaction_authorize_actions_finished_cb function of pk-transaction.c file,
and install signed packages without administrator privileges.

Patch:
https://github.com/hughsie/PackageKit/commit/7e8a7905ea9abbd1f384f05f36a4458682cd4697

Upstream vulnerable commit:
https://github.com/hughsie/PackageKit/commit/f176976e24e8c17b80eff222572275517c16bdad

Comment 1 Adam Mariš 2018-04-11 06:54:54 EDT

Acknowledgments:

Name: Matthias Gerstner (SUSE)

Comment 6 Riccardo Schirone 2018-04-23 11:25:08 EDT

External References:

http://www.openwall.com/lists/oss-security/2018/04/23/3

Comment 7 Zach Warren 2018-04-23 17:42:50 EDT

This appears to be very similar to a previously rejected vulnerability from 2014. How does this differ from the "grinch" vulnerability?

Sources:
[1] https://access.redhat.com/articles/1298913
[2] https://www.alertlogic.com/blog/dont-let-the-grinch-steal-christmas/

Comment 8 Riccardo Schirone 2018-04-24 03:19:38 EDT

Though, as said in your sources, PackageKit+PolKit allow a wheel member to install packages without inserting any password, we don't consider that a vulnerability, but it is one of the reasons of PackageKit existence. Instead the current CVE is about a complete authentication bypass, even for non-members of the wheel group.

Comment 9 errata-xmlrpc 2018-04-24 14:32:12 EDT

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:1224 https://access.redhat.com/errata/RHSA-2018:1224

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