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Date: Wed, 03 Apr 2013 16:27:58 +0200
From: Florian Weimer <fweimer@...hat.com>
To: oss-security@...ts.openwall.com
CC: Marcus Meissner <meissner@...e.de>
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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