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ESB-2005.0279 -- Windows Server 2003 Two Local Denial of Service Vulnerabilities
06 April 2005
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2005.0279 -- Windows Server 2003 Two Local Denial of Service Vulnerabilities 6 April 2005 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Operating System: Microsoft Windows Server 2003 Impact: Denial of Service Access: Existing Account - --------------------------BEGIN INCLUDED TEXT-------------------- PROBLEM: Windows Server 2003 prior to Service Pack 1 has two denial of service vulnerabilties by which authenticated local users, and in particular Terminal Services users can crash the server. 1. Terminal Services Printing Denial of Service A Terminal Services user can cause the system to crash, resulting in a "STOP 0x0000008E" blue screen error. This may be exploited by opening a Microsoft Word attachment in Outlook then printing it to a network printer. The vulnerability is triggered when the Win32k.sys driver tries to access an invalid colour adjustment object passed to it by the printer driver. 2. SMB Redirector Denial of Service When a SMB browser announcement frame is wrongly processed by the SMB redirector, it may attempt to execute code that is paged out and unavailable, resulting in a "STOP 0x000000D1" blue screen error. A local user can exploit this for example by retrieving large files from a network share when the system is under heavy load, potentially causing the system to crash. MITIGATION: These vulnerabilities are fixed in Windows Server 2003 Service Pack 1. REFERENCES:  Terminal Services Printing DoS: Knowledge Base article 829422 http://support.microsoft.com/kb/829422/  SMB Redirector DoS: Knowledge Base article 890554 http://support.microsoft.com/kb/890554/  Secunia Advisory SA14808 http://secunia.com/advisories/14808/ - --------------------------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 firstname.lastname@example.org 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: email@example.com 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 iQCVAwUBQlNyiih9+71yA2DNAQJLlAP/R3NU7aDo4vSnh/5ATOrGhzLpAPYUDLdL xd3AaNvl4Ad/b4+zhPARmE98vmhkhF24GG8JmfJzwXEr5LEU+0kT6XkN/6gun/3V oJz4Waig583pXWJBTnsBDc/VDP6lWZUhWnUSfj68JKbsA/5+Xdi7OLAy9YW0/oua oUPpgN9b494= =ebTG -----END PGP SIGNATURE-----
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