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From: Andreas Schwab <schwab@suse.de>
To: Florian Weimer <fweimer@redhat.com>
Cc: libc-alpha@sourceware.org
Subject: Re: [PATCH] CVE-2023-4527: Stack read overflow with large TCP
 responses in no-aaaa mode
In-Reply-To: <87a5tr5pr5.fsf@oldenburg.str.redhat.com> (Florian Weimer's
	message of "Tue, 12 Sep 2023 18:18:38 +0200")
References: <87a5tr5pr5.fsf@oldenburg.str.redhat.com>
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Date: Wed, 13 Sep 2023 13:43:45 +0200
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On Sep 12 2023, Florian Weimer wrote:

> Without passing alt_dns_packet_buffer, __res_context_search can only
> store 2048 bytes (what fits into dns_packet_buffer).  However,
> the function returns the total packet size, and the subsequent
> DNS parsing code in _nss_dns_gethostbyname4_r reads beyond the end
> of the stack-allocated buffer.

Ok.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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