[PINE-CERT-20020301] OpenSSH off-by-one (fwd)

[ME]

This announcement posted to bugtraq a few moments ago. There will likely
be followup/discussion on BUGTRAQ.

If you are not signed up for it yet, you should seriously consider it.
:-)

It sounds like another issue with older V of ssh and may be so, but does
not take away from the pupose of this e-mail in being to pass the idea
that subscriptions to BUGTRAQ are gooooood.

-ME

---------- Forwarded message ----------
Date: Thu, 7 Mar 2002 13:25:20 +0000
From: Joost Pol <joost at pine.nl>
To: bugtraq at securityfocus.com
Cc: vulnwatch at vulnwatch.org
Subject: [PINE-CERT-20020301] OpenSSH off-by-one

See attached advisory.

-- 
Joost Pol alias 'Nohican' <joost at pine.nl> PGP 584619BD
PGP fingerprint B1FA EE66 CFAA A492 D5F8 9A8A 0CDA D2CA 5846 19BD
PINE Internet BV - Tel +31-50-5731111 - Fax +31-70-3111011

(Attachment converted to text and included in-line)

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- -----------------------------------------------------------------------------
 Pine Internet Security Advisory
- -----------------------------------------------------------------------------
 Advisory ID       : PINE-CERT-20020301
 Authors           : Joost Pol <joost at pine.nl>
 Issue date        : 2002-03-07
 Application       : OpenSSH
 Version(s)        : All versions between 2.0 and 3.0.2
 Platforms         : multiple
 Vendor informed   : 20020304
 Availability      : http://www.pine.nl/advisories/pine-cert-20020301.txt
- -----------------------------------------------------------------------------

Synopsis

        A bug exists in the channel code of OpenSSH versions 2.0 - 3.0.2

        Users with an existing user account can abuse this bug to
        gain root privileges. Exploitability without an existing
        user account has not been proven but is not considered
        impossible. A malicious ssh server could also use this bug 
	to exploit a connecting vulnerable client.

Impact

        HIGH: Existing users will gain root privileges.

Description

        Simple off by one error. Patch included.

Solution

        The OpenSSH project will shortly release version 3.1. 
	
	Upgrading to this version is highly recommended. 

	This version will be made available at http://www.openssh.com

	The FreeBSD port of OpenSSH has been updated to reflect the 
	patches as supplied in this document.

	OpenSSH CVS has been updated, see
	
	http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/ \
	channels.c.diff?r1=1.170&r2=1.171

	Or apply the attached patch as provided by PINE Internet:

	http://www.pine.nl/advisories/pine-cert-20020301.patch


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