Document ID: 59810
Last Updated 2001 April 12
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To: BugTraq Subject: IOS and NTP Date: Apr 12 2001 9:18AM Author: Damir Rajnovic <gaus cisco com> Message-ID: <email@example.com> In-Reply-To: <20010411184348.K413@tigerteam.net> Hi there, At 18:43 11/04/2001 +0700, Fyodor wrote: >Cisco IOS (at least 11.x series) _IS_ vulnerable (tested, confirmed). Earlier >versions are presumably vulnerable too. Haven't tested IOS 12.x but it may have >the same bug inherited as well (unless cisco folks found the problem and fixed >it silently). Despite what Fyodor said, we were unable to get IOS crash. Admittedly, we have not tested all IOS releases but we did test: 10.3, 11.0, 12.0 and 12.1. Our finding is that we were unable to crash IOS by using the exploit which has been posted on the Bugtraq. However, we can not rule out the possibility that certain IOS release, on a given HW with a particular configuration will crash. So, in the mean time, as a precaution, we advise all customers to insert the following line into the configuration: ntp access-group serve-only This will prevent the router from processing NTP control requests. Cheers, Gaus ============== Damir Rajnovic <psirt cisco com>, PSIRT Incident Manager, Cisco Systems <http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html> Phone: +44 7715 546 033 4 The Square, Stockley Park, Uxbridge, MIDDLESEX UB11 1BN, GB ============== There is no insolvable problems. Question remains: can you accept the solution?
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|Updated: Oct 08, 2004||Document ID: 59810|