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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT Security Bulletin ASB-2010.0043.2 Authentication Bypass vulnerability in XenServer 15 February 2010 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Citrix XenServer Operating System: XEN Impact/Access: Unauthorised Access -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2010-0633 Member content until: Saturday, March 6 2010 Revision History: February 15 2010: Added CVE February 4 2010: Initial Release OVERVIEW Citrix have reported a vulnerability in XenServer that could result in an authentication bypass. IMPACT The vendor has provided the following information regarding this vulnerability: "A vulnerability has been discovered in XenServer that, when triggered, could allow a subset of Xen API (XAPI) calls to be executed without proper authentication." [1] This vulnerability affects XenServer 5.5 and XenServer 5.0 Update 3 and earlier. [1] MITIGATION Citrix have provided a hotfix to address this vulnerability. For download links specific to your system, please see the vendor's bulletin. [1] REFERENCES [1] Vulnerability in XenServer Could Result in Authentication Bypass http://support.citrix.com/article/CTX123456 AusCERT has made every effort to ensure that the information contained in this document is accurate. However, the decision to use the information described is the responsibility of each user or organisation. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. 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 iD8DBQFLeMXV/iFOrG6YcBERAhY2AJ0RFEA0vuSj5PIE3CVGY1zY/SDK/gCfZzQ9 Be0xrYiIrp+wiLkFKI6An/0= =Y7M1 -----END PGP SIGNATURE-----