exploit the possibilities
Home Files News &[SERVICES_TAB]About Contact Add New

Citrix XenServer 6.0.2 Privilege Escalation

Citrix XenServer 6.0.2 Privilege Escalation
Posted Oct 30, 2012
Authored by James Forshaw, Context Information Security Ltd | Site contextis.co.uk

Citrix XenServer version 5.0 through 6.0.2 suffer from a privilege escalation vulnerability.

tags | advisory
advisories | CVE-2012-4606
SHA-256 | eb3974e68da4195443054f477c4bf3f18f7d35f86b9ec8a0799c51acbb0c4459

Citrix XenServer 6.0.2 Privilege Escalation

Change Mirror Download
Systems Affected: Citrix XenServer 5.0 through 6.0.2
Severity: High
Category: Privilege Escalation
Author: Context Information Security
Reported to vendor: 24th May 2012
Advisory Issued: 30th October 2012
Reference: CVE-2012-4606

The XenServer remote VNC terminal emulator contains a vulnerability which would allow a user of a guest VM to get code executing in the hypervisor leading to elevation of privilege on the server on which the guest VM was being hosted.

Citrix XenServer is distributed with a VT100 terminal emulator which is exposed via the VNC protocol to allow a remote user to administer their hosted para-virtualised machine. The application does not correctly handle certain escape sequences which can lead to an unprivileged guest VM being able to gain code execution in the fully privileged Dom0 allowing the entire hosting server to be controlled.

It should be noted that the vulnerable code was also used in the QEMU-KVM terminal that can be used by emulated virtual machines; this is under a different CVE, CVE-2012-3515.

Technologies Affected
Citrix XenServer 6.0
Citrix XenServer 5.6
Citrix XenServer 5.5
Citrix XenServer 5.0

Vendor Response
Vendor issued a security hot fix of the 5th September 2012. See http://support.citrix.com/article/CTX134708 for support information and download locations for different versions of XenServer.

Disclosure Timeline
24th May 2012 – Vendor notified
5th September 2012 – Vendor issues fix

James Forshaw of Context Information Security

About Context Information Security

Context Information Security is an independent security consultancy specialising in both technical security and information assurance services.

The company was founded in 1998. Its client base has grown steadily over the years, thanks in large part to personal recommendations from existing clients who value us as business partners. We believe our success is based on the value our clients place on our product-agnostic, holistic approach; the way we work closely with them to develop a tailored service; and to the independence, integrity and technical skills of our consultants.

The company’s client base now includes some of the most prestigious blue chip companies in the world, as well as government organisations.

The best security experts need to bring a broad portfolio of skills to the job, so Context has always sought to recruit staff with extensive business experience as well as technical expertise. Our aim is to provide effective and practical solutions, advice and support: when we report back to clients we always communicate our findings and recommendations in plain terms at a business level as well as in the form of an in-depth technical report.

Web: www.contextis.com
Email: disclosure@contextis.co.uk

Login or Register to add favorites

File Archive:

June 2024

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Jun 1st
    0 Files
  • 2
    Jun 2nd
    0 Files
  • 3
    Jun 3rd
    18 Files
  • 4
    Jun 4th
    21 Files
  • 5
    Jun 5th
    0 Files
  • 6
    Jun 6th
    57 Files
  • 7
    Jun 7th
    6 Files
  • 8
    Jun 8th
    0 Files
  • 9
    Jun 9th
    0 Files
  • 10
    Jun 10th
    12 Files
  • 11
    Jun 11th
    27 Files
  • 12
    Jun 12th
    38 Files
  • 13
    Jun 13th
    16 Files
  • 14
    Jun 14th
    14 Files
  • 15
    Jun 15th
    0 Files
  • 16
    Jun 16th
    0 Files
  • 17
    Jun 17th
    16 Files
  • 18
    Jun 18th
    26 Files
  • 19
    Jun 19th
    15 Files
  • 20
    Jun 20th
    18 Files
  • 21
    Jun 21st
    8 Files
  • 22
    Jun 22nd
    0 Files
  • 23
    Jun 23rd
    0 Files
  • 24
    Jun 24th
    19 Files
  • 25
    Jun 25th
    5 Files
  • 26
    Jun 26th
    0 Files
  • 27
    Jun 27th
    0 Files
  • 28
    Jun 28th
    0 Files
  • 29
    Jun 29th
    0 Files
  • 30
    Jun 30th
    0 Files

Top Authors In Last 30 Days

File Tags


packet storm

© 2022 Packet Storm. All rights reserved.

Security Services
Hosting By