Bugtraq mailing list archives
Re: tcpdump workaround against dnsloop exploit.
From: davids () WEBMASTER COM (David Schwartz)
Date: Sat, 6 May 2000 15:12:54 -0700
This won't work. It stops an A->A->A loop but allows an A->B->A->B loop. What you want is something more like:
+ /* + * If we got two time the same data ptr, + * or are being referred forward, + * this means we may loop. + */ + if ( cp >= old) + return NULL; + old = cp;
DS
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