-----BEGIN PGP SIGNED MESSAGE----- =============================================================================== Security Advisory CERT-NL =============================================================================== Author/Source : Xander Jansen Index : S-98-73 Distribution : World Page : 1 Classification: External Version: 1 Subject : CISCO IOS DFS Access List Leakage Date : 6-Nov-98 =============================================================================== By courtesy of CISCO and CERT Coordination Center we received the following information. In CERT Coordination Center Vendor-Initiated Bulletin VB-98.13.Cisco_IOS_DFS, CISCO reports two vulnerabilities in the IOS software used on Cisco 7xxx routers configured for distributed fast switching (DFS). These vulnerabilities may permit users to send packets to parts of the attached network for which they are not authorized. Neither vulnerability affects any Cisco product other than routers in the 70xx, 72xx or 75xx series. Of 70xx routers, only routers with the optional route-switch processor (RSP) card are affected. The advisory provides workarounds for this problem and pointers to patched versions of the IOS software. CERT-NL recommends to take appropriate action as described in the bulletin. All CERT Coordination Center advisories are mirrored by CERT-NL. The specific URL for this case is: 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 5.5.3i for non-commercial use iQCVAwUBNkLRhFpSTqmIRWKVAQFxhwP+MQnU4WtliK+G2+MFOIs1aTphFu5K+Ky0 7WLMsakpeDvZkQPT/DH2T0ZanCIa+rH0VRiSZ/kiv0RlSr3GiJC5YMxLLL7XMPZh caazS3zJLwC4foU5ohYnKJejAcsTPcnlDUfOS+Kb6HWi/b+dMwwdl+1QMK40L7gv GjVhLYLxowE= =BQJS -----END PGP SIGNATURE----- -- End --