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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2008.0548 -- [Win] Multiple vulnerabilities in Citrix products 26 May 2008 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Citrix Presentation Server versions 4.0, 4.5 Citrix Access Essentials versions 1.0, 1.5, 2.0 Citrix Desktop Server 1.0 Publisher: Citrix Operating System: Windows Server 2003 Windows 2000 Impact: Inappropriate Access Reduced Security Access: Existing Account CVE Names: CVE-2008-2300 CVE-2008-2299 Original Bulletin: http://support.citrix.com/article/CTX114893 http://support.citrix.com/article/CTX116941 Comment: This bulletin contains two Citrix advisories relating to various Citrix products. - --------------------------BEGIN INCLUDED TEXT-------------------- Document ID: CTX116941 Created On: May 12, 2008 Updated On: May 13, 2008 Average Rating: 2 Severity: Medium Description of Problem Citrix Presentation Server provides access control to both published applications and published desktops. Under specific circumstances, an authenticated user may be able to access a desktop session despite being unauthorized to access a published desktop. This vulnerability affects the following products: o Citrix Presentation Server versions up to and including 4.5 o Citrix Access Essentials versions up to and including 2.0 o Citrix Desktop Server version 1.0 Mitigating Factors The user must authenticate to Citrix Presentation Server for this vulnerability to apply. This vulnerability can be used by an authenticated user to gain access to a desktop running in the context of their own account. It does not allow a user to gain any additional Windows privileges, access rights or capabilities. What Customers Should Do A hotfix has been released to address this issue. Citrix recommends that affected customers install the hotfix which can be downloaded from the following locations: Citrix Presentation Server 4.5 for Windows Server 2003: EN - http://support.citrix.com/article/CTX116960 FR - http://support.citrix.com/article/CTX116962 GE - http://support.citrix.com/article/CTX116961 JA - http://support.citrix.com/article/CTX116964 ES - http://support.citrix.com/article/CTX116963 Citrix Presentation Server 4.5 for Windows Server 2003 x64 Editions: EN - http://support.citrix.com/article/CTX116954 FR - http://support.citrix.com/article/CTX116956 GE - http://support.citrix.com/article/CTX116957 JA - http://support.citrix.com/article/CTX116959 ES - http://support.citrix.com/article/CTX116958 Citrix Presentation Server 4.0 for Windows 2000 Server: EN - http://support.citrix.com/article/CTX116521 FR - http://support.citrix.com/article/CTX116522 GE - http://support.citrix.com/article/CTX116528 JA - http://support.citrix.com/article/CTX116529 ES - http://support.citrix.com/article/CTX116527 Citrix Presentation Server 4.0 for Windows Server 2003: EN - http://support.citrix.com/article/CTX116008 FR - http://support.citrix.com/article/CTX116523 GE - http://support.citrix.com/article/CTX116111 JA - http://support.citrix.com/article/CTX116009 ES - http://support.citrix.com/article/CTX116524 Citrix Access Essentials 2.0: EN - http://support.citrix.com/article/CTX116960 FR - http://support.citrix.com/article/CTX116962 GE - http://support.citrix.com/article/CTX116961 JA - http://support.citrix.com/article/CTX116964 ES - http://support.citrix.com/article/CTX116963 Citrix Access Essentials 1.5: EN - http://support.citrix.com/article/CTX116008 FR - http://support.citrix.com/article/CTX116523 GE - http://support.citrix.com/article/CTX116111 JA - http://support.citrix.com/article/CTX116009 ES - http://support.citrix.com/article/CTX116524 Citrix Access Essentials 1.0: EN - http://support.citrix.com/article/CTX116008 FR - http://support.citrix.com/article/CTX116523 GE - http://support.citrix.com/article/CTX116111 JA - http://support.citrix.com/article/CTX116009 ES - http://support.citrix.com/article/CTX116524 Citrix Desktop Server 1.0 for Windows Server 2003: EN - http://support.citrix.com/article/CTX116548 Citrix Desktop Server 1.0 for Windows Server 2003 x64 Editions: EN - http://support.citrix.com/article/CTX116549 What Citrix Is Doing Citrix is notifying customers and channel partners about this potential security issue. This article is also available from the Citrix Knowledge Base at http://support.citrix.com/. Obtaining Support on this Issue If you require technical assistance with this issue, please contact Citrix Technical Support. Information for contacting Citrix Technical Support is available at http://www.citrix.com/English/ss/supportContacts.asp. Reporting Security Vulnerabilities to Citrix Citrix welcomes input regarding the security of its products and considers any and all potential vulnerabilities seriously. If you would like to report a security issue to Citrix, please compose an e-mail to secure@citrix.com containing the exact version of the product in which the vulnerability was found and the steps needed to reproduce the vulnerability. This document applies to: * Presentation Server 4.0 for Microsoft Windows 2003 * Access Essentials 1.5 * Presentation Server 4.5 for Windows Server 2003 * Presentation Server 4.0 for Microsoft Windows 2000 * Access Essentials 2.0 * Desktop Server 1.0 * Feature Pack 1 for Presentation Server 4.5 * Presentation Server 4.5 for Windows Server 2003 x64 Edition * Access Essentials 1.0 - ----------------------------------------------------------------- Document ID: CTX114893 Created On: May 12, 2008 Updated On: May 12, 2008 Average Rating: 5 Severity: Medium Description of Problem The ICA protocol offers configurable encryption capabilities, known as SecureICA and ICA Basic encryption, that can be used to secure traffic between the ICA client and the server. These encryption capabilities are distinct from SSL/TLS encryption. Under some circumstances, a vulnerability in Citrix Presentation Server could allow a client to establish a connection with encryption settings that are lower than the minimum configured by the administrator. This does not affect the use of SSL/TLS by Citrix Presentation Server, or any other Citrix components. This vulnerability affects the following products: o Citrix Presentation Server versions up to and including 4.5 when installed on Windows 2003 Server. o Citrix Access Essentials versions up to and including 2.0 o Citrix Desktop Server 1.0 Mitigating Factors Customers using other means of securing traffic between Citrix Presentation Server and its clients are not affected by this vulnerability. Such methods include Citrix SSL Relay, Citrix Secure Gateway, Citrix Access Gateway Standard, Advanced or Enterprise Edition As best practice, Citrix already recommends the use of additional security technologies to their deployments due to limitations in SecureICA and Citrix Basic encryption. This is documented in articles CTX101737 and CTX155541. What Customers Should Do A hotfix has been released to address this issue. Citrix recommends that customers affected by this issue install the hotfix, which can be downloaded from the locations listed below. Citrix Presentation Server 4.5 for Windows Server 2003: EN - http://support.citrix.com/article/CTX116289 FR - http://support.citrix.com/article/CTX116290 GE - http://support.citrix.com/article/CTX116291 JA - http://support.citrix.com/article/CTX116292 ES - http://support.citrix.com/article/CTX116293 Citrix Presentation Server 4.5 for Windows Server 2003 x64 Editions: EN - http://support.citrix.com/article/CTX116294 FR - http://support.citrix.com/article/CTX116295 GE - http://support.citrix.com/article/CTX116296 JA - http://support.citrix.com/article/CTX116298 ES - http://support.citrix.com/article/CTX116299 Citrix Presentation Server 4.0 for Windows Server 2003: EN - http://support.citrix.com/article/CTX113484 FR - http://support.citrix.com/article/CTX113778 GE - http://support.citrix.com/article/CTX113779 JA - http://support.citrix.com/article/CTX113781 ES - http://support.citrix.com/article/CTX113780 Citrix Access Essentials 2.0: EN - http://support.citrix.com/article/CTX116289 FR - http://support.citrix.com/article/CTX116290 GE - http://support.citrix.com/article/CTX116291 JA - http://support.citrix.com/article/CTX116292 ES - http://support.citrix.com/article/CTX116293 Citrix Access Essentials 1.5: EN - http://support.citrix.com/article/CTX113484 FR - http://support.citrix.com/article/CTX113778 GE - http://support.citrix.com/article/CTX113779 JA - http://support.citrix.com/article/CTX113781 ES - http://support.citrix.com/article/CTX113780 Citrix Access Essentials 1.0: EN - http://support.citrix.com/article/CTX113484 FR - http://support.citrix.com/article/CTX113778 GE - http://support.citrix.com/article/CTX113779 JA - http://support.citrix.com/article/CTX113781 ES - http://support.citrix.com/article/CTX113780 Citrix Desktop Server 1.0 for Windows Server 2003: EN - http://support.citrix.com/article/CTX116805 What Citrix Is Doing Citrix is notifying customers and channel partners about this potential security issue. This article is also available from the Citrix Knowledge Base at http://support.citrix.com/. Obtaining Support on this Issue If you require technical assistance with this issue, please contact Citrix Technical Support. Information for contacting Citrix Technical Support is available at http://www.citrix.com/English/ss/supportContacts.asp. Reporting Security Vulnerabilities to Citrix Citrix welcomes input regarding the security of its products and considers any and all potential vulnerabilities seriously. If you would like to report a security issue to Citrix, please compose an e-mail to secure@citrix.com containing the exact version of the product in which the vulnerability was found and the steps needed to reproduce the vulnerability. This document applies to: * Presentation Server 4.0 for Microsoft Windows 2003 * Access Essentials 1.5 * Presentation Server 4.5 for Windows Server 2003 * Access Essentials 2.0 * Desktop Server 1.0 * Feature Pack 1 for Presentation Server 4.5 * Presentation Server 4.5 for Windows Server 2003 x64 Edition * Access Essentials 1.0 - --------------------------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. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. 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 iQCVAwUBSDpX2Sh9+71yA2DNAQKNzwP9EQCMgHIrGnpE8eQ9Sd7ouUhmTi4ukeef nVqBFlwIMo4pY8/gd822CjDSQyUogCeWH9clzhbak/JLWmnislkbcxTqKnMRugZE 7Lb7uJsSk2aAnVP1FRx2ty1io79eYpfvuQSiiHNyeQIJ15n8EUXo+2GUDRefzBu4 BWW/si1PJCo= =AG5L -----END PGP SIGNATURE-----