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Date: Wed, 03 Apr 2013 16:27:58 +0200
From: Florian Weimer <>
CC: Marcus Meissner <>
Subject: Re: CVE Request: glibc getaddrinfo() stack overflow

On 04/03/2013 01:10 PM, Marcus Meissner wrote:

> I am not sure you can usually push this amount of addresses via DNS for all
> setups.

Both IPv4 and IPv6 addresses are combined in that array, right?  Then 
the protocol limit seems to be around 4000 + 2300 addresses (NAME (2 
bytes with compression) + RCLASS (2) + RTYPE(2) + TTL (4) + RDATALEN(2) 
+ RDATA(4 or 16) per record, total available space is 64K), which could 
be used to blow 128K stacks sometimes used by JVMs.

Florian Weimer / Red Hat Product Security Team

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