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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2002.441 -- Microsoft Security Bulletin MS02-042 Flaw in Network Connection Manager Could Enable Privilege Elevation (Q326886) 16 August 2002 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Network Connection Manager (NCM) Vendor: Microsoft Operating System: Windows 2000 Impact: Administrator Compromise Access Required: Existing Account - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- - - - - - ---------------------------------------------------------------------- Title: Flaw in Network Connection Manager Could Enable Privilege Elevation (Q326886) Date: 14 August 2002 Software: Microsoft Windows 2000 Impact: Privilege elevation Max Risk: Critical Bulletin: MS02-042 Microsoft encourages customers to review the Security Bulletin at: http://www.microsoft.com/technet/security/bulletin/MS02-042.asp . - - - - - ---------------------------------------------------------------------- Issue: ====== The Network Connection Manager (NCM) provides a controlling mechanism for all network connections managed by a host system. Among the functions of the NCM is to call a handler routine whenever a network connection has been established. By design, this handler routine should run in the security context of the user. However, a flaw could make it possible for an unprivileged user to cause the handler routine to run in the security context of LocalSystem, though a very complex process. An attacker who exploited this flaw could specify code of his or her choice as the handler, then establish a network connection in order to cause that code to be invoked by the NCM. The code would then run with full system privileges. Mitigating Factors: ==================== The vulnerability could only be exploited by an attacker who had the appropriate credentials to log onto an affected system interactively. Best practices suggests that unprivileged users not be allowed to interactively log onto business-critical servers. If this recommendation has been followed, machines such as domain controllers, ERP servers, print and file servers, database servers, and others would not be at risk from this vulnerability. Risk Rating: ============ - Internet systems: Low - Intranet systems: Critical - Client systems: Critical Patch Availability: =================== - A patch is available to fix this vulnerability. Please read the Security Bulletin at http://www.microsoft.com/technet/security/bulletin/ms02-042.asp for information on obtaining this patch. - - - - - --------------------------------------------------------------------- THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. - -----BEGIN PGP SIGNATURE----- Version: PGP 7.1 iQEVAwUBPVv1X40ZSRQxA/UrAQFxYQf/ftIxVTaOdjgCe8D7CEajwWHKJ2PNS1M3 l0aWVk2hyXUvnHqSLir3dIgVBjztIx7wUnBiEzg/FTc7WPb6mdU3GNAPYWQu58kW H3zq+V3M9RPrPe97sgHfxfF1ubH0gzatPuGyGKIAkoq5iY2o5LPIMVMtO7Baw+gF vsEnatY5oY1s2QVBYCdBYjRd2puqMQywh/h0iWNFq5kBTp4pbpfnMSbBQoQGTPGX rUviam/WnBhIBL7JEQqv2oCBvO+zzv5ix32IyH4F1kx9DNlxYmhdURWleL+GAotv /G/mV+koIJIIUGjjJWMOUO7TKkmZpNYte2iaA3wRTdbuAQ1fMdeGdw== =88Bk - -----END PGP SIGNATURE----- - --------------------------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. 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 use any or all of this information is the responsibility of each user or organisation, and should be done so in accordance with site policies and procedures. 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 original authors 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/Information/advisories.html If you believe that your system has been compromised, contact AusCERT or your representative in FIRST (Forum of Incident Response and Security Teams). 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----- Version: 2.6.3i Charset: noconv Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key iQCVAwUBPVz8Xyh9+71yA2DNAQGppQP+PAQFxIzUGrV6aGvm2uIwRYKu4irkMuzh qionBrH10SE8LPI0R8aVuKC5JjCCxs5NzMo6jYmSI9iN8vBFPvam9x8sUVOF6s0N kP0vKQb99sP03sH6U9nrnc3SUpD3idwShA6TEcVltsJSg5fIxcVXGO7amGnSW2Sm mfq5Alk9CGc= =qMMa -----END PGP SIGNATURE-----