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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2008.0795 -- [Win] MS08-050 - Vulnerability in Windows Messenger Could Allow Information Disclosure 13 August 2008 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Windows Messenger 4.7 Windows Messenger 5.1 Publisher: Microsoft Operating System: Windows Server 2003 Windows XP Windows 2000 Impact: Access Confidential Data Access: Remote/Unauthenticated CVE Names: CVE-2008-0082 Original Bulletin: http://www.microsoft.com/technet/security/bulletin/ms08-050.mspx - --------------------------BEGIN INCLUDED TEXT-------------------- Microsoft Security Bulletin MS08-050 - Important Vulnerability in Windows Messenger Could Allow Information Disclosure (955702) Published: August 12, 2008 Version: 1.0 General Information Executive Summary This security update resolves a publicly reported vulnerability in supported versions of Windows Messenger. As a result of this vulnerability, scripting of an ActiveX control could allow information disclosure in the context of the logged-on user. An attacker could change state, get contact information, and initiate audio and video chat sessions without the knowledge of the logged-on user. An attacker could also capture the user's logon ID and remotely log on to the user's Messenger client impersonating that user. This security update is rated Important for all supported editions of Microsoft Windows 2000 and Windows XP, and Moderate for all supported versions of Windows Server 2003. For more information, see the subsection, Affected Software, in this section. Recommendation. Microsoft recommends that customers apply the update at the earliest opportunity. Affected Software Windows Messenger 4.7 Windows Messenger 5.1 Vulnerability Information Messenger Information Disclosure Vulnerability - CVE-2008-0082 An information disclosure vulnerability exists in supported versions of Windows Messenger. Scripting of a particular ActiveX control, Messenger.UIAutomation.1, could allow information disclosure from these programs in the context of the logged-on user. An attacker could change state, get contact information, and initiate audio and video chat sessions without the knowledge of the logged-on user. An attacker could also capture the user's logon ID and remotely log on to the user's Messenger client as that user. Workarounds for Messenger Information Disclosure Vulnerability - CVE-2008-0082 Configure Internet Explorer to prompt before running Active Scripting or to disable Active Scripting in the Internet and Local intranet security zone Set Internet and Local intranet security zone settings to "High" to prompt before running ActiveX Controls and Active Scripting in these zones Set the killbit for the Messenger.UIAutomation.1 control - --------------------------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 iQCVAwUBSKIqTih9+71yA2DNAQIjGgP/ZZn6NDqywbbXf4LBgnAKex6fXcC6iAKu 5PvSbd/Xd4sAIORi6tFsU5X37Q8YB2A6WOt8y9iAcy+ynRfH6HLOPCYRbVZeWk8g 90voyncHRdRG4F4Yj4griSj+H/RHtDNdEVZu/R6ARtHfoT0iWBpsSVs4d655OjC6 8oT3/zwiMmI= =6fL9 -----END PGP SIGNATURE-----