Published:
02 December 1999
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-1999.184 -- Microsoft Security Bulletin (MS99-054) Patch Available for "WPAD Spoofing" Vulnerability 03 December 1999 =========================================================================== Microsoft Corporation has released the following security bulletin concerning a vulnerability in the Web Proxy Auto Detect feature of Internet Explorer 5. This vulnerability may cause a client browser to search for a WPAD server outside the local network. A bogus WPAD server may be configured to provide arbitrary proxy settings to the client, if the proxy settings were invalid. This vulnerability affects Microsoft Internet Explorer 5. If a bogus WPAD server provided proxy settings for a client which were invalid then a denial of service attack may be made against the client's site. Additionally, if a bogus WPAD server was established to route local browser traffic from the client's site through a hostile user's site, then the malicious site may eavesdrop on the client site's browser traffic. http://www.microsoft.com/Security/Bulletins/MS99-054.asp =========================================================================== This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document referenced 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. If you have any questions or need further information, please contact Microsoft Corporation 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 emergencies. -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key iQCVAwUBOFpaDih9+71yA2DNAQGS9gQAnr0eVjFOKeL6GW0ipwwacgLEkh1biZDt F015ApP8cj7FBhgnES+jMwwz1xcEwzqkAS/X53qZpNbS5vjS41kCmhuID/gWarVc ejSCfs5Rs7twastqdstsD4oWmBUhtVbmtaTuyAsJsxKoI9ALJIkhWxK4IQQe8e38 R/4r5brLSTY= =c1Wx -----END PGP SIGNATURE-----