Date: Sun, 29 Aug 2010 15:07:06 +0200 From: Florian Weimer <fw@...eb.enyo.de> To: oss-security@...ts.openwall.com Subject: Re: CVE Request: BGP protocol vulnerability * Kurt Seifried: >> The BGP protocol and its various extensions require that BGP peering >> sessions are terminated when a peer receives a BGP update message >> which it considers semantically incorrect, leading to a persistent >> denial-of-service condition if the update is received again after the >> terminated session is reestablished. >> >> (This is not something new at all---we just need to get up, treat it >> as a vulnerability, and fix it.) > > This sounds like CVE-2010-3035 > http://www.cisco.com/warp/public/707/cisco-sa-20100827-bgp.shtml In this context, I don't like that the peer on the receiving end resets the session. It's got a significant impact on availability, and the resulting UPDATE churn hurts everybody a little bit. In short, I think there are two bugs: IOS XR producing bad data, and other implementations dealing badly with it.
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