Bugtraq mailing list archives
BIND 9.2.1 patch, multiple RR's for singleton types.
From: Tim Gladding <tim () gladding com>
Date: Tue, 2 Jul 2002 00:33:44 -0400 (EDT)
With the release of the libbind buffer overflow a number of people have suggested loading a copy of BIND locally and pointing your local resolver at just that name server, providing a sanity check of all incoming DNS traffic. For the most part this will work, however, for it to work effectively you must be using BIND 9.x because BIND 8.x does not reconstruct all responses before forwarding them on. For more information on the libbind buffer overflow bug please see: http://www.cert.org/advisories/CA-2002-19.html However, your situation may preclude you from running BIND 9 either locally or at the site level. One such situation would be that you are already running BIND 8 and you have zones loaded that will not load in to BIND 9 because they have multiple resource records assigned to one singleton data type. For example, an A record pointing to a list of CNAMES: fuzzy IN CNAME www.snuggie.com. IN CNAME www.r-9.net. Normally BIND 9 would reject this as part of a zone. To overcome this particular problem I have produced the attached patch(1) to BIND 9.2.1 which, when applied, will again allow you to use multiple CNAMEs etc. on one RR. This patch is the equivalent of the 'multiple-cnames yes;' option in bind 8.x. WARNING!! Although I am running this patch in a production environment I cannot guarantee that this patch will work for you. Please be sure to double check the functionality of this patch before employing it in any environment!! -- Tim Gladding
Attachment:
rdataslab.c.patch
Description:
Current thread:
- BIND 9.2.1 patch, multiple RR's for singleton types. Tim Gladding (Jul 02)
- Re: BIND 9.2.1 patch, multiple RR's for singleton types. Jim Reid (Jul 02)
- Re: BIND 9.2.1 patch, multiple RR's for singleton types. der Mouse (Jul 04)
- Re: BIND 9.2.1 patch, multiple RR's for singleton types. Tim Gladding (Jul 04)
- Sybase contact Aaron C. Newman (Jul 05)
- Re: Sybase contact Ryan Russell (Jul 05)
- Re: BIND 9.2.1 patch, multiple RR's for singleton types. Jim Reid (Jul 02)