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Bug 208298

Summary: CVE-2006-4924 openssh DoS
Product: Red Hat Enterprise Linux 2.1 Reporter: Josh Bressers <bressers>
Component: opensshAssignee: Tomas Mraz <tmraz>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 2.1Keywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: reported=20060919,public=20060919,source=vendorsec,impact=moderate
Fixed In Version: RHSA-2006-0698 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2006-09-29 00:24:39 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Josh Bressers 2006-09-27 19:04:25 UTC 
+++ This bug was initially created as a clone of Bug #207955 +++

Tavis Ormandy of the Google Security Team discovered a denial of service attack
on the openssh sshd daemon when ssh protocol version 1 is enabled.  This flaw
will cause the openssh server to consume a large quantity of the CPU until the
specified timeout is reached.

The upstream patches can be found here:
http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/deattack.c.diff?r1=1.29&r2=1.30&sortby=date&f=h
http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/packet.c.diff?r1=1.143&r2=1.144&sortby=date&f=h
http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/deattack.h.diff?r1=1.9&r2=1.10&sortby=date&f=h
Comment 3 Red Hat Bugzilla 2006-09-29 00:24:39 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2006-0698.html