ID CVE-2012-4425
Summary 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.
References
Vulnerable Configurations
  • cpe:2.3:a:gtk:libgio
    cpe:2.3:a:gtk:libgio
  • cpe:2.3:a:freedesktop:spice-gtk
    cpe:2.3:a:freedesktop:spice-gtk
CVSS
Base: 6.9 (as of 19-09-2012 - 10:46)
Impact:
Exploitability:
CWE CWE-264
CAPEC
  • Accessing, Modifying or Executing Executable Files
    An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
  • Leverage Executable Code in Non-Executable Files
    An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
  • Blue Boxing
    This type of attack against older telephone switches and trunks has been around for decades. A tone is sent by an adversary to impersonate a supervisor signal which has the effect of rerouting or usurping command of the line. While the US infrastructure proper may not contain widespread vulnerabilities to this type of attack, many companies are connected globally through call centers and business process outsourcing. These international systems may be operated in countries which have not upgraded Telco infrastructure and so are vulnerable to Blue boxing. Blue boxing is a result of failure on the part of the system to enforce strong authorization for administrative functions. While the infrastructure is different than standard current applications like web applications, there are historical lessons to be learned to upgrade the access control for administrative functions.
  • Restful Privilege Elevation
    Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.
  • Target Programs with Elevated Privileges
    This attack targets programs running with elevated privileges. The attacker would try to leverage a bug in the running program and get arbitrary code to execute with elevated privileges. For instance an attacker would look for programs that write to the system directories or registry keys (such as HKLM, which stores a number of critical Windows environment variables). These programs are typically running with elevated privileges and have usually not been designed with security in mind. Such programs are excellent exploit targets because they yield lots of power when they break. The malicious user try to execute its code at the same level as a privileged system call.
  • Manipulating Input to File System Calls
    An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.
Access
VectorComplexityAuthentication
LOCAL MEDIUM NONE
Impact
ConfidentialityIntegrityAvailability
COMPLETE COMPLETE COMPLETE
exploit-db via4
description libdbus - 'DBUS_SYSTEM_BUS_ADDRESS' Local Privilege Escalation. CVE-2012-3524. Local exploit for linux platform
file exploits/linux/local/21323.c
id EDB-ID:21323
last seen 2016-02-02
modified 2012-07-17
platform linux
port
published 2012-07-17
reporter Sebastian Krahmer
source https://www.exploit-db.com/download/21323/
title libdbus - 'DBUS_SYSTEM_BUS_ADDRESS' Local Privilege Escalation
type local
nessus via4
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2012-1284.NASL
    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. 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.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 62170
    published 2012-09-18
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=62170
    title RHEL 6 : spice-gtk (RHSA-2012:1284)
  • NASL family Scientific Linux Local Security Checks
    NASL id SL_20120917_SPICE_GTK_ON_SL6_X.NASL
    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) All users of spice-gtk are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. To resolve dependencies gtk2, libcacard, libusb1, and spice-protocol have been added to the necessary repositories.
    last seen 2019-02-21
    modified 2018-12-31
    plugin id 62175
    published 2012-09-18
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=62175
    title Scientific Linux Security Update : spice-gtk on SL6.x i386/x86_64
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2012-14046.NASL
    description Fix CVE-2012-4425 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2015-10-20
    plugin id 62418
    published 2012-10-04
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=62418
    title Fedora 16 : spice-gtk-0.11-5.fc16 (2012-14046)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2012-13513.NASL
    description Update qemu / spice packages to their latest upstream releases : - qemu-1.2.0 - spice-0.11.3 - spice-protocol-0.12.1 - spice-gtk-0.13.29 - usbredir-0.5 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2015-10-20
    plugin id 62157
    published 2012-09-18
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=62157
    title Fedora 18 : qemu-1.2.0-3.fc18 / spice-0.11.3-1.fc18 / spice-gtk-0.13.29-4.fc18 / etc (2012-13513)
  • NASL family CentOS Local Security Checks
    NASL id CENTOS_RHSA-2012-1284.NASL
    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. 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.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 62187
    published 2012-09-19
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=62187
    title CentOS 6 : spice-gtk (CESA-2012:1284)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2012-14107.NASL
    description Fix for CVE-2012-4425 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2015-10-20
    plugin id 62331
    published 2012-09-27
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=62331
    title Fedora 17 : spice-gtk-0.12-5.fc17 (2012-14107)
  • NASL family Gentoo Local Security Checks
    NASL id GENTOO_GLSA-201406-29.NASL
    description The remote host is affected by the vulnerability described in GLSA-201406-29 (spice-gtk: Privilege escalation) spice-gtk does not properly sanitize the DBUS_SYSTEM_BUS_ADDRESS environment variable. Impact : A local attacker may be able to gain escalated privileges. Workaround : There is no known workaround at this time.
    last seen 2019-02-21
    modified 2015-04-13
    plugin id 76273
    published 2014-06-27
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=76273
    title GLSA-201406-29 : spice-gtk: Privilege escalation
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2012-1284.NASL
    description From Red Hat Security Advisory 2012:1284 : 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. 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.
    last seen 2019-02-21
    modified 2018-07-18
    plugin id 68628
    published 2013-07-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=68628
    title Oracle Linux 6 : spice-gtk (ELSA-2012-1284)
redhat via4
advisories
bugzilla
id 857283
title CVE-2012-4425 spice-gtk/glib: Possible privilege escalation via un-sanitized environment variable
oval
AND
  • OR
    • comment Red Hat Enterprise Linux 6 Client is installed
      oval oval:com.redhat.rhsa:tst:20100842001
    • comment Red Hat Enterprise Linux 6 Server is installed
      oval oval:com.redhat.rhsa:tst:20100842002
    • comment Red Hat Enterprise Linux 6 Workstation is installed
      oval oval:com.redhat.rhsa:tst:20100842003
    • comment Red Hat Enterprise Linux 6 ComputeNode is installed
      oval oval:com.redhat.rhsa:tst:20100842004
  • OR
    • AND
      • comment spice-glib is earlier than 0:0.11-11.el6_3.1
        oval oval:com.redhat.rhsa:tst:20121284013
      • comment spice-glib is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20121284014
    • AND
      • comment spice-glib-devel is earlier than 0:0.11-11.el6_3.1
        oval oval:com.redhat.rhsa:tst:20121284015
      • comment spice-glib-devel is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20121284016
    • AND
      • comment spice-gtk is earlier than 0:0.11-11.el6_3.1
        oval oval:com.redhat.rhsa:tst:20121284005
      • comment spice-gtk is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20121284006
    • AND
      • comment spice-gtk-devel is earlier than 0:0.11-11.el6_3.1
        oval oval:com.redhat.rhsa:tst:20121284011
      • comment spice-gtk-devel is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20121284012
    • AND
      • comment spice-gtk-python is earlier than 0:0.11-11.el6_3.1
        oval oval:com.redhat.rhsa:tst:20121284009
      • comment spice-gtk-python is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20121284010
    • AND
      • comment spice-gtk-tools is earlier than 0:0.11-11.el6_3.1
        oval oval:com.redhat.rhsa:tst:20121284007
      • comment spice-gtk-tools is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20121284008
rhsa
id RHSA-2012:1284
released 2012-09-17
severity Moderate
title RHSA-2012:1284: spice-gtk security update (Moderate)
rpms
  • spice-glib-0:0.11-11.el6_3.1
  • spice-glib-devel-0:0.11-11.el6_3.1
  • spice-gtk-0:0.11-11.el6_3.1
  • spice-gtk-devel-0:0.11-11.el6_3.1
  • spice-gtk-python-0:0.11-11.el6_3.1
  • spice-gtk-tools-0:0.11-11.el6_3.1
refmap via4
bid 55555
exploit-db 21323
misc https://bugzilla.redhat.com/show_bug.cgi?id=857283
mlist
  • [oss-security] 20120912 libdbus CVE-2012-3524 fix
  • [oss-security] 20120914 Re: libdbus CVE-2012-3524 fix
  • [oss-security] 20120917 Re: libdbus CVE-2012-3524 fix
  • [scm-commits] 20120914 [spice-gtk/f18] Add patch fixing CVE 2012-4425
  • [spice-devel] 20120914 [spice-gtk] usb-acl-helper: Clear environment
Last major update 31-10-2012 - 00:04
Published 18-09-2012 - 13:55
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