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Bug 158916

Summary:	CAN-2004-0175 malicious rsh server can cause rcp to write to arbitrary files
Product:	Red Hat Enterprise Linux 2.1	Reporter:	Josh Bressers <bressers>
Component:	rsh	Assignee:	Karel Zak <kzak>
Status:	CLOSED ERRATA	QA Contact:	Ben Levenson <benl>
Severity:	low	Docs Contact:
Priority:	medium
Version:	2.1	CC:	barryn, kzak, nalin
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:	impact=low,public=20000901
Fixed In Version:	RHSA-2005-495	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2005-06-13 12:23:19 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 2005-05-26 20:29:23 UTC

+++ This bug was initially created as a clone of Bug #120147 +++

Back in 2000 it was reported that a malicious ssh server could cause
scp to write to arbitrary files outside of the current directory. 
See:    
http://cert.uni-stuttgart.de/archive/bugtraq/2000/09/msg00499.html

This is a valid behaviour of the rcp protocol.

The issue was rediscovered in Mar 2004 and discussed amongst OSS
vendors, with Markus Friedl from OpenBSD writing a proposed patch for
this issue but warned that it needed a lot of testing:
        
http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/scp.c.diff?r1=1.113&r2=1.114

Comment 1 Josh Bressers 2005-05-26 20:30:35 UTC

My notes list this issue as affecting rsh only on RHEL2.1.  I'm not sure what
upstream has done to fix this issue.

Comment 2 Josh Bressers 2005-06-02 19:35:26 UTC

Ping on this issue

Comment 3 Karel Zak 2005-06-02 19:45:00 UTC

I have a patch that fix this problem (already included in RHEL3, RHEL4 and FCx).
I'm going to reease it for AS2.1 ASAP (probably next week).

Comment 4 Josh Bressers 2005-06-02 19:50:42 UTC

Karel,

If you give me the n-v-r, I'd be more than happy to write the errata for you. 
Thanks.

Comment 5 Karel Zak 2005-06-06 09:10:18 UTC

Thanks Josh. It wasn't so big problem create new errata as copy from old one :-)

errata: RHSA-2005:495
package: rsh-0.17-18.AS21.4.

Comment 6 Josh Bressers 2005-06-13 12:23:19 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-2005-495.html