Executive Summary

Summary
Title spice-gtk security update
Informations
Name RHSA-2012:1284 First vendor Publication 2012-09-17
Vendor RedHat Last vendor Modification 2012-09-17
Severity (Vendor) Moderate Revision 01

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:M/Au:N/C:C/I:C/A:C)
Cvss Base Score 6.9 Attack Range Local
Cvss Impact Score 10 Attack Complexity Medium
Cvss Expoit Score 3.4 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Problem Description:

Updated spice-gtk packages that fix one security issue are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64 Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64 Red Hat Enterprise Linux HPC Node (v. 6) - x86_64 Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64 Red Hat Enterprise Linux Server (v. 6) - i386, x86_64 Red Hat Enterprise Linux Server Optional (v. 6) - i386, x86_64 Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64 Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

3. Description:

The spice-gtk packages provide a GIMP Toolkit (GTK+) widget for SPICE (Simple Protocol for Independent Computing Environments) clients. Both Virtual Machine Manager and Virtual Machine Viewer can make use of this widget to access virtual machines using the SPICE protocol.

It was discovered that the spice-gtk setuid helper application, spice-client-glib-usb-acl-helper, did not clear the environment variables read by the libraries it uses. A local attacker could possibly use this flaw to escalate their privileges by setting specific environment variables before running the helper application. (CVE-2012-4425)

Red Hat would like to thank Sebastian Krahmer of the SUSE Security Team for reporting this issue.

All users of spice-gtk are advised to upgrade to these updated packages, which contain a backported patch to correct this issue.

4. Solution:

Before applying this update, make sure all previously-released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/knowledge/articles/11258

5. Bugs fixed (http://bugzilla.redhat.com/):

857283 - CVE-2012-4425 spice-gtk/glib: Possible privilege escalation via un-sanitized environment variable

Original Source

Url : https://rhn.redhat.com/errata/RHSA-2012-1284.html

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-264 Permissions, Privileges, and Access Controls

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:20906
 
Oval ID: oval:org.mitre.oval:def:20906
Title: RHSA-2012:1284: spice-gtk security update (Moderate)
Description: libgio, when used in setuid or other privileged programs in spice-gtk and possibly other products, allows local users to gain privileges and execute arbitrary code via the DBUS_SYSTEM_BUS_ADDRESS environment variable. NOTE: it could be argued that this is a vulnerability in the applications that do not cleanse environment variables, not in libgio itself.
Family: unix Class: patch
Reference(s): RHSA-2012:1284-01
CESA-2012:1284
CVE-2012-4425
Version: 4
Platform(s): Red Hat Enterprise Linux 6
CentOS Linux 6
Product(s): spice-gtk
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:23989
 
Oval ID: oval:org.mitre.oval:def:23989
Title: ELSA-2012:1284: spice-gtk security update (Moderate)
Description: libgio, when used in setuid or other privileged programs in spice-gtk and possibly other products, allows local users to gain privileges and execute arbitrary code via the DBUS_SYSTEM_BUS_ADDRESS environment variable. NOTE: it could be argued that this is a vulnerability in the applications that do not cleanse environment variables, not in libgio itself.
Family: unix Class: patch
Reference(s): ELSA-2012:1284-01
CVE-2012-4425
Version: 6
Platform(s): Oracle Linux 6
Product(s): spice-gtk
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:27586
 
Oval ID: oval:org.mitre.oval:def:27586
Title: DEPRECATED: ELSA-2012-1284 -- spice-gtk security update (moderate)
Description: [0.11-11.el6_3.1] - Fix version for Z-stream Related: rhbz#854823 [0.11-12] - Add patch fixing CVE-2012-3524 Resolves: rhbz#854823
Family: unix Class: patch
Reference(s): ELSA-2012-1284
CVE-2012-4425
Version: 4
Platform(s): Oracle Linux 6
Product(s): spice-gtk
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1
Application 1

OpenVAS Exploits

Date Description
2012-10-05 Name : Fedora Update for spice-gtk FEDORA-2012-14046
File : nvt/gb_fedora_2012_14046_spice-gtk_fc16.nasl
2012-09-27 Name : Fedora Update for spice-gtk FEDORA-2012-14107
File : nvt/gb_fedora_2012_14107_spice-gtk_fc17.nasl
2012-09-22 Name : CentOS Update for spice-glib CESA-2012:1284 centos6
File : nvt/gb_CESA-2012_1284_spice-glib_centos6.nasl
2012-09-22 Name : RedHat Update for spice-gtk RHSA-2012:1284-01
File : nvt/gb_RHSA-2012_1284-01_spice-gtk.nasl

Nessus® Vulnerability Scanner

Date Description
2014-06-27 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201406-29.nasl - Type : ACT_GATHER_INFO
2013-07-12 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2012-1284.nasl - Type : ACT_GATHER_INFO
2012-10-04 Name : The remote Fedora host is missing a security update.
File : fedora_2012-14046.nasl - Type : ACT_GATHER_INFO
2012-09-27 Name : The remote Fedora host is missing a security update.
File : fedora_2012-14107.nasl - Type : ACT_GATHER_INFO
2012-09-19 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2012-1284.nasl - Type : ACT_GATHER_INFO
2012-09-18 Name : The remote Fedora host is missing one or more security updates.
File : fedora_2012-13513.nasl - Type : ACT_GATHER_INFO
2012-09-18 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2012-1284.nasl - Type : ACT_GATHER_INFO
2012-09-18 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20120917_spice_gtk_on_SL6_x.nasl - Type : ACT_GATHER_INFO

Alert History

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Date Informations
2014-02-17 11:56:23
  • Multiple Updates