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ESB-2003.0715 -- NetBSD Security Advisory 2003-017 -- OpenSSL multiple vulnerabilities

Date: 13 October 2003
References:

Click here for printable version
Click here for PGP verifiable version
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===========================================================================
             AUSCERT External Security Bulletin Redistribution

            ESB-2003.0715 -- NetBSD Security Advisory 2003-017
                     OpenSSL multiple vulnerabilities
                              13 October 2003

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:                OpenSSL
Publisher:              NetBSD
Operating System:       NetBSD-current: sources prior to October 3, 2003
                        NetBSD 1.6.1
                        NetBSD 1.6
                        NetBSD-1.5.3
                        NetBSD-1.5.2
                        NetBSD-1.5.1
                        NetBSD-1.5
Impact:                 Denial of Service
Access Required:        Remote
CVE Names:              CAN-2003-0543, CAN-2003-0544, CAN-2003-0545

Ref:                    AL-2003.18

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		 NetBSD Security Advisory 2003-017
		 =================================

Topic:		OpenSSL multiple vulnerabilities

Version:	NetBSD-current:	sources prior to October 3, 2003
		NetBSD 1.6.1:	affected
		NetBSD 1.6:	affected
		NetBSD-1.5.3:	affected
		NetBSD-1.5.2:	affected
		NetBSD-1.5.1:	affected
		NetBSD-1.5:	affected
		pkgsrc:		packages prior to openssl-0.9.6k/0.9.7c

Severity:	possible remote code injection

Fixed:		NetBSD-current:		October 3, 2003
		NetBSD-1.6 branch:	October 3, 2003 (1.6.2 will include the fix)
		NetBSD-1.5 branch:	October 4, 2003
		pkgsrc:		openssl-0.9.6k/0.9.7c corrects the issue


Abstract
========

OpenSSL had multiple vulnerabilities, they were found by tests performed
by NISCC (www.niscc.gov.uk).

- - - ASN.1 decoder could overrun its stack if a malicious X.509 certificate
is received

- - - malfomed X.509 certificates could cause crashes under certain
circumstances

The vulnerability can be attacked remotely, even if SSL client
authentication is not enabled.

Note that OpenSSH is not affected by this issue, as it does not use the
OpenSSL ASN.1 decoder.


Technical Details
=================

http://www.securityfocus.com/archive/1/339623/2003-09-27/2003-10-03/0
http://www.uniras.gov.uk/vuls/2003/006489/openssl.htm

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0545
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0543
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0544


Solutions and Workarounds
=========================

A rebuild of libcrypto and libssl is necessary.  If you have installed
any program that statically links one of those libraries, it must be
rebuilt too.

If you have daemons that use those libraries, any running instances must
be restarted.  A reboot after replacing libcrypto/libssl is recommended.

The following instructions describe how to upgrade your libcrypto/libssl
binaries by updating your source tree and rebuilding and
installing a new version of libcrypto/libssl.

* NetBSD-current:

	Systems running NetBSD-current dated from before 2003-10-02
	should be upgraded to NetBSD-current dated 2003-10-03 or later.

	The following directories need to be updated from the
	netbsd-current CVS branch (aka HEAD):
		crypto/dist/openssl

	To update from CVS, re-build, and re-install libcrypto and libssl:

		# cd src
		# cvs update -d -P crypto/dist/openssl

		# cd lib/libcrypto
		# make USETOOLS=no cleandir dependall
		# make USETOOLS=no install

		# cd ../../lib/libssl
		# make USETOOLS=no cleandir dependall
		# make USETOOLS=no install

* NetBSD 1.6, 1.6.1:

	The binary distribution of NetBSD 1.6 and 1.6.1 are vulnerable.

	Systems running NetBSD 1.6 sources dated from before
	2003-10-02 should be upgraded from NetBSD 1.6 sources dated
	2003-10-03 or later.

	NetBSD 1.6.2 will include the fix.

	The following directories need to be updated from the
	netbsd-1-6 CVS branch:
		crypto/dist/openssl

	To update from CVS, re-build, and re-install libcrypto and libssl:

		# cd src
		# cvs update -d -P -r netbsd-1-6 crypto/dist/openssl

		# cd lib/libcrypto
		# make USETOOLS=no cleandir dependall
		# make USETOOLS=no install

		# cd ../../lib/libssl
		# make USETOOLS=no cleandir dependall
		# make USETOOLS=no install


* NetBSD 1.5, 1.5.1, 1.5.2, 1.5.3:

	The binary distribution of NetBSD 1.5 to 1.5.3 are vulnerable.   

	Systems running NetBSD 1.5, 1.5.1, 1.5.2, or 1.5.3 sources dated
	from before 2003-10-03 should be upgraded from NetBSD 1.5.*
	sources dated 2003-10-04 or later.

	The following directories need to be updated from the
	netbsd-1-5 CVS branch:
		crypto/dist/openssl

	To update from CVS, re-build, and re-install libcrypto and libssl:

		# cd src
		# cvs update -d -P -r netbsd-1-5 crypto/dist/openssl

		# cd lib/libcrypto
		# make cleandir dependall
		# make install

		# cd ../../lib/libssl
		# make cleandir dependall
		# make install


Thanks To
=========

Matthias Scheler


Revision History
================

	2003-10-09	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-SA2003-017.txt.asc

Information about NetBSD and NetBSD security can be found at
http://www.NetBSD.org/ and http://www.NetBSD.org/Security/.


Copyright 2003, The NetBSD Foundation, Inc.  All Rights Reserved.
Redistribution permitted only in full, unmodified form.

$NetBSD: NetBSD-SA2003-017.txt,v 1.4 2003/10/09 19:29:53 david Exp $

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