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Date: Thu, 5 Feb 2004 14:30:35 -0800
From: "Thor Larholm" <>
To: <>
Subject: OpenBSD IPv6 remote kernel crash

Georgi Guninski posted an advisory on his site about a remote crash in
the OpenBSD kernel caused by connecting with a small IPv6 MTU.

The error was present in revision 1.81 of /src/sys/netinet6/ip6_output.c
and is fixed in revision 1.82 ( 2004/02/04 08:47:41 ), you can see the
colored diffs at

OpenBSD administrators should pull the revised code from CVS and
recompile their kernels.


Thor Larholm
Senior Security Researcher
PivX Solutions
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