-----BEGIN PGP SIGNED MESSAGE----- =============================================================================== Security Advisory CERT-NL =============================================================================== Author/Source : Teun Nijssen Index : S-98-39 Distribution : World Page : 1 Classification: External Version: 1 Subject : Microsoft IIS WWW server vulnerability Date : 09-Jul-98 =============================================================================== By courtesy of CERT Coordination Center we received the following information. CERT Coordination Center advisory VB-98.06.MS_IIS_multiple_data_streams reports a vulnerability in the Microsoft Internet Information Server, versions 1.0 through 4.0. This vulnerability allows WWW users unintentional access to server files. This advisory provides information about the problem and a pointer to hotfixes by Microsoft, available at ftp://ftp.microsoft.com/bussys/IIS/iis-public/fixes/usa/security/ CERT-NL recommends to apply the patches as soon as possible, as this so called "$DATA" bug has been widely published, not only is security groups, but also e.g. in the Daily Planet news service. All CERT Coordination Center advisories are mirrored by CERT-NL. The specific URL for this case is: ftp://ftp.nic.surfnet.nl/surfnet/net-security/cert-cc-mirror/ cert_bulletins/VB-98.06.MS_IIS_multiple_data_streams ADVISORIES ARE REGULARLY UPDATED BY CERT COORDINATION CENTER. Therefore we advise you to check on our mirror regularly - you can automate this process using the CERT-NL notifier service. More information about the CERT-NL mirror and notifier services is contained in News items N-95-01 (notifier) and N-95-02 (CERT mirror), both present on ============================================================================== CERT-NL is the Computer Emergency Response Team for SURFnet customers. SURFnet is the Dutch network for educational, research and related institutes. CERT-NL is a member of the Forum of Incident Response and Security Teams (FIRST). All CERT-NL material is available under: http://www.surfnet.nl/surfnet/security/cert-nl.html ftp://ftp.surfnet.nl/surfnet/net-security In case of computer or network security problems please contact your local CERT/security-team or CERT-NL (if your institute is NOT a SURFnet customer please address the appropriate (local) CERT/security-team). CERT-NL is one/two hour(s) ahead of UTC (GMT) in winter/summer, i.e. UTC+0100 in winter and UTC+0200 in summer (DST). Email: cert-nl@surfnet.nl ATTENDED REGULARLY ALL DAYS Phone: +31 302 305 305 BUSINESS HOURS ONLY Fax: +31 302 305 329 BUSINESS HOURS ONLY Snailmail: SURFnet bv Attn. CERT-NL P.O. Box 19035 NL - 3501 DA UTRECHT The Netherlands NOODGEVALLEN: 06 52 87 92 82 ALTIJD BEREIKBAAR EMERGENCIES : +31 6 52 87 92 82 ATTENDED AT ALL TIMES CERT-NL'S EMERGENCY PHONENUMBER IS ONLY TO BE USED IN CASE OF EMERGENCIES: THE SURFNET HELPDESK OPERATING THE EMERGENCY NUMBER HAS A *FIXED* PROCEDURE FOR DEALING WITH YOUR ALERT AND WILL IN REGULAR CASES RELAY IT TO CERT-NL IN AN APPROPRIATE MANNER. CERT-NL WILL THEN CONTACT YOU. ============================================================================== -----BEGIN PGP SIGNATURE----- Version: PGPfreeware 5.0i for non-commercial use Charset: noconv iQCVAwUBNaRy0VpSTqmIRWKVAQHLOwQAnbgw0h7flNqMA5UzHQQK2Dj6MPbvwub+ A8ud8HGkWQQlKf9Tczd9woq9c0U3zn4SZnWdScaSLeXtBKElX0pTaK0/RwtJ8wIO 5f66quD4mUUPxMAUSE3mdEfyTUyTbHaj2vec2kt+aOzUGT2vGgDPDhHw/lgb7Jam YTA9oyS5RmU= =2ErN -----END PGP SIGNATURE-----