---------------------------------------------------------------------- Bist Du interessiert an einem neuen Job in IT-Sicherheit? Secunia hat zwei freie Stellen als Junior und Senior Spezialist in IT- Sicherheit: http://secunia.com/secunia_vacancies/ ---------------------------------------------------------------------- TITLE: Microsoft Windows Telephony Service Vulnerability SECUNIA ADVISORY ID: SA16354 VERIFY ADVISORY: http://secunia.com/advisories/16354/ CRITICAL: Moderately critical IMPACT: Privilege escalation, System access WHERE: >From local network OPERATING SYSTEM: Microsoft Windows 2000 Advanced Server http://secunia.com/product/21/ Microsoft Windows 2000 Datacenter Server http://secunia.com/product/1177/ Microsoft Windows 2000 Professional http://secunia.com/product/1/ Microsoft Windows 2000 Server http://secunia.com/product/20/ Microsoft Windows 98 http://secunia.com/product/12/ Microsoft Windows 98 Second Edition http://secunia.com/product/13/ Microsoft Windows Millenium http://secunia.com/product/14/ Microsoft Windows Server 2003 Datacenter Edition http://secunia.com/product/1175/ Microsoft Windows Server 2003 Enterprise Edition http://secunia.com/product/1174/ Microsoft Windows Server 2003 Standard Edition http://secunia.com/product/1173/ Microsoft Windows Server 2003 Web Edition http://secunia.com/product/1176/ Microsoft Windows XP Home Edition http://secunia.com/product/16/ Microsoft Windows XP Professional http://secunia.com/product/22/ DESCRIPTION: A vulnerability has been reported in Microsoft Windows, which can be exploited by malicious, local users to gain escalated privileges or by malicious people to compromise a vulnerable system. The vulnerability is caused due to an unspecified error in the TAPI (Telephony Application Programming Interface) service when validating permissions and the length of certain messages before copying the data to an allocated buffer. Successful exploitation allows malicious, local users to gain escalated privileges. On certain configurations of Windows 2000 Server and Windows Server 2003 with the Telephony service enabled (disabled by default), it is also possible to exploit the vulnerability without a local account. However, only authenticated users can access the service on Windows Server 2003 and hence exploit the vulnerability. SOLUTION: Apply patches. Microsoft Windows 2000 (requires SP4): http://www.microsoft.com/downloads/details.aspx?FamilyId=C7417EA1-7AFC-4A55-95DC-E814975B8AE6 Microsoft Windows XP (requires SP1 or SP2): http://www.microsoft.com/downloads/details.aspx?FamilyId=B049004B-AF28-41D7-8AE6-7A3DB15211F1 Microsoft Windows XP Professional x64 Edition: http://www.microsoft.com/downloads/details.aspx?FamilyId=705545D0-B53B-4E17-8B62-A4C652697C61 Microsoft Windows Server 2003: http://www.microsoft.com/downloads/details.aspx?FamilyId=0097FE14-1D6B-4423-A437-DEA1ED665A07 Microsoft Windows Server 2003 (for Itanium-based systems): http://www.microsoft.com/downloads/details.aspx?FamilyId=BC16BEAE-0BAD-490C-A80F-4BF81C360CA0 Microsoft Windows Server 2003 x64 Edition: http://www.microsoft.com/downloads/details.aspx?FamilyId=0CEF9CC2-A7BD-42E0-81B1-EDC303DA8A40 Microsoft Windows 98, Microsoft Windows 98 SE, and Microsoft Windows ME: The vendor will not be releasing patches, as the vulnerability isn't considered critical on these versions. PROVIDED AND/OR DISCOVERED BY: The vendor credits Kostya Kortchinsky, CERT Renater. ORIGINAL ADVISORY: MS05-40 (KB893756): http://www.microsoft.com/technet/security/Bulletin/MS05-040.mspx ---------------------------------------------------------------------- About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities. Subscribe: http://secunia.com/secunia_security_advisories/ Definitions: (Criticality, Where etc.) http://secunia.com/about_secunia_advisories/ Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor. ---------------------------------------------------------------------- Unsubscribe: Secunia Security Advisories http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org ----------------------------------------------------------------------