-----BEGIN PGP SIGNED MESSAGE-----

Hash: SHA1
		 NetBSD Security Advisory 2008-001

		 =================================
Topic:		file(1) Integer overflow
Version:	NetBSD-current:		affected

		NetBSD 4.0:		not affected

		NetBSD 3.1.1:		not affected

		NetBSD 3.1		affected

		NetBSD 3.0:		affected

		NetBSD 3.0.3:		not affected

		NetBSD 3.0.2:		affected

		NetBSD 3.0.1:		affected

		NetBSD 3.0:		affected

		NetBSD 2.1		affected

		NetBSD 2.0.*		affected
Severity:	Local code execution
Fixed:		NetBSD-current:		June 7, 2007

		NetBSD-3-1 branch:	June 24, 2007

		NetBSD-3-0 branch:	June 24, 2007

		NetBSD-3 branch:	June 24, 2007

			(3.2 will include the fix)

		pkgsrc:			file-4.2.1 corrects the issue
Abstract

========
An integer underflow was initially fixed in file 4.20 and soon after, a

new integer overflow was identified in the original fix. To address the

latest issue file 4.21 was release.  Either of these issues could result

in local code execution if using file(1) on a maliciously crafted file.
This vulnerability has been assigned CVE reference CVE-2007-1536 for the

initial issue and CVE-2007-2799 for the issue in the initial fix.
Technical Details

=================
An integer underflow was found in file_printf() which can lead to an

exploitable heap overflow.  The initial fix for this issue was found

to introduce an integer overflow which could again lead to code execution.

An updated patch was released as a part of file(1) 4.21.
Solutions and Workarounds

=========================
It is recommended that NetBSD users of vulnerable versions update

their binaries.
The following instructions describe how to upgrade your file(1)

binaries by updating your source tree and rebuilding and

installing a new version of file(1).
* NetBSD-current:
	Systems running NetBSD-current dated from before 2007-06-07

	should be upgraded to NetBSD-current dated 2007-06-08 or later.
	The following files/directories need to be updated from the

	netbsd-current CVS branch (aka HEAD):

		dist/file

		distrib/sets/lists/base/shl.elf

		distrib/sets/lists/base/shl.mi

		lib/Makefile

		lib/libmagic/Makefile

		lib/libmagic/config.h

		lib/libmagic/shlib_version

		tools/file/Makefile

		usr.bin/file/Makefile
	To update from CVS, re-build, and re-install file:
		# cd src

		# cvs update -d -P dist/file

		# cvs update -r distrib/sets/lists/base/shl.elf \

			distrib/sets/lists/base/shl.mi \

			lib/Makefile \

			lib/libmagic/Makefile \

			lib/libmagic/config.h \

			lib/libmagic/shlib_version \

			tools/file/Makefile \

			usr.bin/file/Makefile

		# cd usr.bin/file

		# make USETOOLS=no cleandir dependall

		# make USETOOLS=no install
* NetBSD 3.*:
	Systems running NetBSD 3.* sources dated from before

	2007-06-24 should be upgraded from NetBSD 3.* sources dated

	2007-06-25 or later.
	The following files/directories need to be updated from the

	netbsd-3, netbsd-3-0 or netbsd-3-1 branches:

		dist/file

		distrib/sets/lists/base/shl.elf

		distrib/sets/lists/base/shl.mi

		lib/Makefile

		lib/libmagic/Makefile

		lib/libmagic/config.h

		lib/libmagic/shlib_version

		tools/file/Makefile

		usr.bin/file/Makefile
	To update from CVS, re-build, and re-install file:
		# cd src

		# cvs update -d -P dist/file

		# cvs update -r distrib/sets/lists/base/shl.elf \

			distrib/sets/lists/base/shl.mi \

			lib/Makefile \

			lib/libmagic/Makefile \

			lib/libmagic/config.h \

			lib/libmagic/shlib_version \

			tools/file/Makefile \

			usr.bin/file/Makefile

		# cd usr.bin/file

		# make USETOOLS=no cleandir dependall

		# make USETOOLS=no install
Thanks To

=========
Christos Zoulas and Antti Kantee for patches, importing fixes and testing.
Revision History

================
	2008-02-28	Initial release
More Information

================
Advisories may be updated as new information becomes available.

The most recent version of this advisory (PGP signed) can be found at

  ftp://ftp.NetBSD.org/pub/NetBSD/security/advisories/NetBSD-SA2008-001.tx...
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-SA2008-001.txt,v 1.3 2008/02/28 19:27:42 adrianp Exp $
-----BEGIN PGP SIGNATURE-----
iQCVAwUBR8cLbz5Ru2/4N2IFAQI7VwP+KDlsvnFkH6fo07u+r1sYKQnGTVi7/tdA

i6mH7H5pAch+g5SlbtauE+6qQWLMA95N9g+I1l5QvBbXmz6czgQyfgQuAQ/JAyLE

c+hiHn+JdOTVPiZ/e5rpeOCIVDGznncm2zpMM5dUtoAlmXOITJTXSkCd00G0ofpM

jzAT1lK/AdA=

=+sib

-----END PGP SIGNATURE-----