Bug 207957 (CVE-2006-4924)

Summary:	CVE-2006-4924 openssh DoS
Product:	[Other] Security Response	Reporter:	Josh Bressers <bressers>
Component:	vulnerability	Assignee:	Tomas Mraz <tmraz>
Status:	CLOSED ERRATA	QA Contact:	Brian Brock <bbrock>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	deisenst
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	openssh-4.3p2-4.10	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2006-10-06 07:08:31 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 2006-09-25 15:37:25 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 1 Fedora Update System 2006-10-03 20:02:15 UTC

openssh-4.3p2-4.10 has been pushed for fc5, which should resolve this issue.  If these problems are still present in this version, then please make note of it in this bug report.

Comment 2 David Eisenstein 2006-10-06 07:08:31 UTC

Hrm.  If this issue is resolved, then shouldn't this bug report be closed
by the Fedora Updates System?

Anyhoo, the resolution is Fedora Update Notification "FEDORA-2006-1011",
posted at:
<http://www.redhat.com/archives/fedora-package-announce/2006-October/msg00006.html>

Closing this bug.  (If I am wrong to close this bug, please let me know?)