[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]
NetBSD Security Advisory 2008-015: ICMPv6 Packet Too Big messages
-----BEGIN PGP SIGNED MESSAGE-----
NetBSD Security Advisory 2008-015
Topic: ICMPv6 Packet Too Big messages
Version: NetBSD-current: affected
NetBSD 4.0.*: not affected
NetBSD 4.0: affected
NetBSD 3.1.*: affected
NetBSD 3.1: affected
NetBSD 3.0.*: affected
NetBSD 3.0: affected
Severity: Denial of service
Fixed: NetBSD-current: October 03, 2008
NetBSD-4-0 branch: October 03, 2008
(4.0.1 includes the fix)
NetBSD-4 branch: October 03, 2008
(4.1 will include the fix)
NetBSD-3-1 branch: October 03, 2008
(3.1.2 will include the fix)
NetBSD-3-0 branch: October 03, 2008
(3.0.4 will include the fix)
NetBSD-3 branch: October 03, 2008
(3.2 will include the fix)
An error may occur while processing ICMPv6 'Packet Too Big' (RFC 2463)
messages which may result in a denial of service (system panic).
This vulnerability has been assigned CVE-2008-3530.
An error can occur when processing the proposed MTU of an ICMPv6
'Packet Too Big' message.
Solutions and Workarounds
Only kernels compiled with the following option are vulnerable to this issue:
As a temporary workaround recompile the kernel with the above option
commented out. The default NetBSD GENERIC kernels have this
For all NetBSD versions, you need to obtain fixed kernel sources,
rebuild and install the new kernel, and reboot the system.
The fixed source may be obtained from the NetBSD CVS repository.
The following instructions briefly summarise how to upgrade your
kernel. In these instructions, replace:
ARCH with your architecture (from uname -m), and
KERNCONF with the name of your kernel configuration file.
To update from CVS, re-build, and re-install the kernel:
# cd src
# cvs update -d -P sys/netinet6/icmp6.c
# ./build.sh kernel=KERNCONF
# mv /netbsd /netbsd.old
# cp sys/arch/ARCH/compile/obj/KERNCONF/netbsd /netbsd
# shutdown -r now
For more information on how to do this, see:
Matt Thomas for the fix and FreeBSD for initial analysis of the issue.
2008-10-27 Initial release
Advisories may be updated as new information becomes available.
The most recent version of this advisory (PGP signed) can be found at
Information about NetBSD and NetBSD security can be found at
http://www.NetBSD.org/ and http://www.NetBSD.org/Security/.
Copyright 2008, The NetBSD Foundation, Inc. All Rights Reserved.
Redistribution permitted only in full, unmodified form.
$NetBSD: NetBSD-SA2008-015.txt,v 1.4 2008/10/27 19:47:21 adrianp Exp $
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (NetBSD)
-----END PGP SIGNATURE-----
Main Index |
Thread Index |