Published:
02 June 2006
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2006.0383 -- [VMware] Corsaire Security Advisory: VMware ESX Server Cross Site Scripting issue 2 June 2006 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: VMWare ESX prior to 2.5.2 upgrade patch 2 VMware ESX prior to 2.1.2 upgrade patch 6 VMware ESX prior to 2.0.1 upgrade patch 6 Publisher: UNIRAS Impact: Cross-site Scripting Access: Remote/Unauthenticated CVE Names: CVE-2005-3619 - --------------------------BEGIN INCLUDED TEXT-------------------- - ---------------------------------------------------------------------------------- UNIRAS (UK Govt CERT) Briefing Notice - 376/06 dated 01.06.06 Time: 16:00 UNIRAS is part of NISCC (National Infrastructure Security Co-ordination Centre) - ---------------------------------------------------------------------------------- UNIRAS material is also available from its website at www.uniras.gov.uk and Information about NISCC is available from www.niscc.gov.uk - ---------------------------------------------------------------------------------- Title ===== Corsaire Security Advisory: VMware ESX Server Cross Site Scripting issue Detail ====== - -- Corsaire Security Advisory -- Title: VMware ESX Server Cross Site Scripting issue Date: 14.11.05 Application: VMware ESX prior to 2.5.2 upgrade patch 2 VMware ESX prior to 2.1.2 upgrade patch 6 VMware ESX prior to 2.0.1 upgrade patch 6 Environment: VMware ESX Author: Stephen de Vries [stephen.de.vries@corsaire.com] Audience: General distribution Reference: c051114-002 - -- Scope -- The aim of this document is to clearly define an issue that exists with the VMware ESX Server product [1] that will allow a remote attacker to inject arbitrary active scripting content, such as JavaScript, into a web session. - -- History -- Discovered: 11.11.05 (Stephen de Vries) Vendor notified via client: 15.11.05 Vendor notified directly: 19.05.06 Document released: 01.06.06 - -- Overview -- VMware ESX Server is described [1] as virtual infrastructure software for partitioning, consolidating and managing servers in mission-critical environments. The software provides a virtualization layer that allows multiple x86 based operating systems to run on the same hardware concurrently. The ESX Server product differs from other VMware products in that it does not require a "host" operating system to be provided by the user. Instead, it uses a custom x86 kernel as the host, along with a customised Linux operating system as a "console O/S". VMware ESX Server includes a number of network services and a web application, called the "VMware Management Interface" that can be used to perform remote administration of the system. - -- Analysis -- The VMware ESX Server product provides a web application to perform management of the system. One of the functions of this application is to allow administrative users to view log files, such as syslog, through a browser. No encoding of syslog data is performed to ensure that HTML meta-characters are not interpreted by the browser. This allows an attacker to inject HTML content, including JavaScript, into the syslog file where it would be rendered or executed when viewed through the Management Interface. Since the raw syslog data is displayed between <div> tags, it is necessary to close the tag for a clean injection. Two injection methods were detected: 1. An attacker could simply attempt to log in to the Management Interface with a username that contains the injection script, such as: </div><script>alert('XSS')</script> 2. An attacker could attempt to log in to the ftp server with a username containing a similar injection string. It should be noted that the ftp server is not enabled by default, however, the Management Interface is. This flaw could be used to conduct any number of Cross Site Scripting attacks [2], such as Session Hijacking, Cross Site Request Forgery or apparent falsification of the syslog data. The risk of this vulnerability is increased due to the fact that only administrative users have permission to view the syslog files through the Management Interface. Should a Session Hijacking attack be successful, it would therefore likely yield administrative access. - -- Recommendations -- Upgrade to a version of the VMware ESX product that does not exhibit this issue: VMware ESX 2.5.2 upgrade patch 2 and later VMware ESX 2.1.2 upgrade patch 6 and later VMware ESX 2.0.1 upgrade patch 6 and later - -- CVE -- The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2005-3619 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org), which standardises names for security problems. - -- References -- [1] http://www.vmware.com/products/esx/ [2] http://www.aspectsecurity.com/topten/xss.html - -- Revision -- a. Initial release. b. Minor edits. c. Released. - -- Distribution -- The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Corsaire accepts no responsibility for any damage caused by the use or misuse of this information. - -- Disclaimer -- The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Corsaire accepts no responsibility for any damage caused by the use or misuse of this information. - -- About Corsaire -- Corsaire are a leading information security consultancy, founded in 1997 in Guildford, Surrey, UK. Corsaire bring innovation, integrity and analytical rigour to every job, which means fast and dramatic security performance improvements. Our services centre on the delivery of information security planning, assessment, implementation, management and vulnerability research. A free guide to selecting a security assessment supplier is available at http://www.penetration-testing.com Copyright 2005-2006 Corsaire Limited. All rights reserved. - ---------------------------------------------------------------------------------- UNIRAS wishes to acknowledge the contributions of Corsaire for the information contained in this Briefing. - ---------------------------------------------------------------------------------- This Briefing contains the information released by the original author. Some of the information may have changed since it was released. If the vulnerability affects you, it may be prudent to retrieve the advisory from the site of the original source to ensure that you receive the most current information concerning that problem. Reference to any specific commercial product, process, or service by trade name, trademark manufacturer, or otherwise, does not constitute or imply its endorsement, recommendation, or favouring by UNIRAS or NISCC. The views and opinions of authors expressed within this notice shall not be used for advertising or product endorsement purposes. Neither UNIRAS or NISCC shall also accept responsibility for any errors or omissions contained within this briefing notice. In particular, they shall not be liable for any loss or damage whatsoever, arising from or in connection with the usage of information contained within this notice. UNIRAS is a member of the Forum of Incident Response and Security Teams (FIRST) and has contacts with other international Incident Response Teams (IRTs) in order to foster cooperation and coordination in incident prevention, to prompt rapid reaction to incidents, and to promote information sharing amongst its members and the community at large. - ---------------------------------------------------------------------------------- <End of UNIRAS Briefing> - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. 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If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBRH/JfCh9+71yA2DNAQLLsgP+NnZsUxSx3+KPnDfN3Lz6f488OjKypZJL dKOo5MTbCddAQPDb4LokTcoTLSf9tRe04rg1jwDTUjaY26kIclfjwxKtanw0Gi6v S7vPgDe4RFgPFJcOvp28b4fiq2eklyzu0zN8y29ieuswxTawcYjmRlWvTeuxOzQO jLCH2AGVIfc= =bdzr -----END PGP SIGNATURE-----