===================================================================== CERT-Renater Note d'Information No. 2009/VULN173 _____________________________________________________________________ DATE : 17/04/2009 HARDWARE PLATFORM(S) : / OPERATING SYSTEM(S) : Systems running BlackBerry Enterprise Server, BlackBerry® Professional Software. ====================================================================== http://www.blackberry.com/btsc/search.do?cmd=displayKC&docType=kc&externalId=KB17953 http://www.blackberry.com/btsc/microsites/microsite.do?cmd=displayKC&docType=kc&externalId=KB17969&sliceId=1&docTypeID=DT_SECURITY_1_1 ______________________________________________________________________ Cross site scripting vulnerability in the BlackBerry Enterprise Server MDS Connection Service Doc ID : KB17969 Last Modified : 04-16-2009 Document Type : Security Advisory Environment * BlackBerry® Enterprise Server software version 4.1.6 MR4 and earlier Overview This advisory describes a security issue whereby the MDS Connection Service of the BlackBerry Enterprise Server is susceptible to a potential cross site scripting vulnerability. The issue relates to the handling of malformed URLs. Issue Severity: This vulnerability has a Common Vulnerability Scoring System (CVSS) score of 3.5. Issue Status: Vulnerability confirmed. Software containing security update released. Recommendation: Complete the resolution actions documented in this advisory. References: Reference Value CVE® Identifier CVE-2009-0307 Acknowledgements RIM thanks Ken Millar of Sensient Technologies Corporation, Michael Thumann of ERNW, and Martin O'Neal and Stephen de Vries of Corsaire for independently reporting this issue to RIM, and working with RIM to protect its customers. Problem A security vulnerability exists in the MDS Connection Service of the BlackBerry Enterprise Server Version 4.1.6 MR4 and earlier. This vulnerability could enable externally supplied scripts to be executed in the security context of the user administering the MDS Connection Service using the BlackBerry Administration Service. Resolution RIM has corrected this vulnerability in BlackBerry Enterprise Server version 4.1.6 MR5, and recommends that this update be installed for improved stability and security. Visit http://www.blackberry.com/go/serverdownloads to obtain this update for affected BlackBerry Enterprise Server software versions. Workaround The issue can be fully mitigated by disabling script execution within the browser. However, this may affect operation of the features of the BlackBerry Manager. Partial mitigation can be achieved by logging in to the BlackBerry Manager using an account with lesser rights or from a system with a browser that supports enhanced security mode such as Microsoft® Windows Server 2003, Microsoft Windows Server 2008 or Microsoft Vista. Additional Information CVSS is a vendor agnostic, industry open standard designed to convey the severity of vulnerabilities. CVSS scores may be used to determine the urgency for update deployment within an organization. CVSS scores range from 0.0 (no vulnerability) to 10.0 (critical). RIM uses CVSS in vulnerability assessments to present an immutable characterization of security issues. RIM assigns all security relevant issues a non-zero score. Common Vulnerabilities and Exposures (CVE) is a dictionary of common names (CVE Identifiers) for publicly known information security vulnerabilities maintained by the MITRE corporation. Visit http://www.blackberry.com/security for more information on BlackBerry security. Products * BlackBerry Enterprise Server ______________________________________________________________________ Vulnerabilities in the PDF distiller of the BlackBerry Attachment Service for the BlackBerry Enterprise Server Doc ID : KB17953 Last Modified : 04-16-2009 Document Type : Security Advisory Environment * BlackBerry® Enterprise Server software version 4.1 Service Pack 3 (4.1.3) through 4.1 Service Pack 6 (4.1.6) * BlackBerry® Professional Software 4.1 Service Pack 4 (4.1.4) Note This advisory does not replace KB15766 and KB17118, which describe earlier, similar vulnerabilities. For the convenience of affected customers, the fixes for KB15766 and KB17118 are included in the software update provided for the new vulnerabilities described in this security advisory. Customers affected by the issues described in this advisory should also review KB15766 and KB17118 to review how they are protected from the vulnerability described in that advisory after applying either the updates provided in KB15766 and KB17118, or the one provided in this advisory. Overview This advisory describes security issues that the BlackBerry Attachment Service component of the BlackBerry Enterprise Server software is susceptible to. The issues relate to the handling of malformed and possibly malicious PDF files. Issue Severity: These vulnerabilities each have a Common Vulnerability Scoring System (CVSS) score of 9.3. Issue Status: Vulnerability confirmed. Software containing security update released. Recommendation: Complete the resolution actions documented in this advisory. References: Reference Value Related BlackBerry security advisories KB15766, KB17118 Problem Multiple security vulnerabilities exist in the PDF distiller of some released versions of the BlackBerry Attachment Service. These vulnerabilities could enable a malicious individual to send an email message containing a specially crafted PDF file, which when opened for viewing on a BlackBerry smartphone, could cause memory corruption and possibly lead to arbitrary code execution on the computer that hosts the BlackBerry Attachment Service. Resolution RIM has issued an interim security software update that resolves this vulnerability in affected versions of the BlackBerry Enterprise Server software and BlackBerry Professional Software. For BlackBerry Enterprise Server * Visit http://www.blackberry.com/go/serverdownloads to download and install Interim Security Software Update 3 for affected BlackBerry Enterprise Server software versions. OR * For BlackBerry Enterprise Server for Microsoft Exchange or Lotus Domino, visit http://www.blackberry.com/go/serverdownloads to download and install version 4.1.6 MR5 or later. For BlackBerry Professional Software Visit http://na.blackberry.com/eng/support/downloads/#tab_professional to obtain Interim Security Software Update 3 for affected BlackBerry Professional Software versions. Workaround Note: As a mobile device best practice, Research In Motion (RIM) recommends that BlackBerry smartphone users open attachments from trusted sources only. Prevent the BlackBerry Attachment Service from processing PDF files in a BlackBerry Enterprise Server environment You can prevent the BlackBerry Attachment Service from processing PDF files by editing the list of file format extensions that the BlackBerry Attachment Service opens, and then preventing the PDF attachment distiller from running on the BlackBerry Attachment Service. To remove the PDF file extension from the list of supported file format extensions, complete the following actions: 1.From the Windows Desktop, open the BlackBerry Server Configuration tool. 2.Click the Attachment Server tab. 3.In the Format Extensions field, delete pdf: from the colon–delimited list of extensions. 4.Click Apply. 5.Click OK. Until you prevent the PDF attachment distiller from running, the BlackBerry Attachment Service still detects a PDF file with a renamed extension (in other words, its extension is not .pdf) and attempts to process the file automatically. To prevent the PDF attachment distiller from running, complete the following actions: 1.On the Windows Desktop, open the BlackBerry Server Configuration tool. 2.Click the Attachment Server tab. 3.In the Configuration Option drop-down list, select Attachment Server. 4.In the Distiller Settings section, next to the distiller name Adobe PDF, clear the check box in the Enabled column. 5.Click Apply. 6.Click OK. 7.On the Windows Desktop, in Administrative Tools, open Services. 8.Right-click BlackBerry Attachment Service and click Stop. 9.Right-click BlackBerry Attachment Service and click Start. 10.Close Services. In Microsoft Exchange and Novell GroupWise environments, complete the following additional steps: 1. On the Windows Desktop, in Administrative Tools, open Services. 2. Right-click BlackBerry Dispatcher and click Stop. 3. Right-click BlackBerry Dispatcher and click Start. 4. Close Services. Note: Restarting BlackBerry Enterprise Server services might delay message delivery to BlackBerry devices. For more information, see KB04789. In IBM Lotus Domino environments, complete the following additional steps: 1.Open the Lotus Domino Administrator. 2.Click the Server tab. 3.Click the Status tab 4.Click Server Console. 5.In the Domino Command field, type tell BES quit and press ENTER. 6.In the Domino Command field, type load BES and press ENTER. 7.Close the Lotus Domino Administrator. Additional Information You can install the BlackBerry Attachment Service on a remote computer and then place that computer on its own network segment to prevent the spread of potential attacks from the BlackBerry Attachment Service to another computer within your organization’s network. In a segmented network, attacks are isolated and contained on a single area of the network. Using segmented network architecture is designed to improve the security and performance of the BlackBerry Attachment Service network segment by filtering out attachment data that is not destined for other network segments. For more information about placing the BlackBerry Enterprise Solution components in a network architecture that is segmented to prevent the spread of potential malware attacks, see Placing the BlackBerry Enterprise Solution in a Segmented Network. CVSS is a vendor agnostic, industry open standard designed to convey the severity of vulnerabilities. CVSS scores may be used to determine the urgency for update deployment within an organization. CVSS scores range from 0.0 (no vulnerability) to 10.0 (critical). RIM uses CVSS in vulnerability assessments to present an immutable characterization of security issues. RIM assigns all security relevant issues a non-zero score. Visit www.blackberry.com/security for more information on BlackBerry security. Products * BlackBerry Enterprise Server * BlackBerry Professional Software ====================================================================== ========================================================= Les serveurs de référence du CERT-Renater http://www.urec.fr/securite http://www.cru.fr/securite http://www.renater.fr ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 151 bd de l'Hopital | fax : 01-53-94-20-41 + + 75013 Paris | email: certsvp@renater.fr + =========================================================