Bug 126718

Summary: CAN-2004-0497 inode_change_ok missing checks allows GID changes (ipf)
Product: Red Hat Enterprise Linux 2.1 Reporter: Mark J. Cox <mjc>
Component: kernelAssignee: Jason Baron <jbaron>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 2.1CC: knoel, riel
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: ia64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2004-08-18 14:41:57 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Mark J. Cox 2004-06-25 08:55:07 UTC 
An audit by SUSE found a missing "must be owner of the file" check in
inode_change_ok().  In the 2.6 kernel this allows a local user to be
able to change the groupid of any object (except those setgid) by
using chown.  In the 2.4 kernel this is exploitable only via a kernel
nfsd export where the server will grant requests to change GID when it
shouldn't.

SUSE suggested an embargo date of Jul14 1600MEST but this has been
adjusted to Jun29 1600MEST.
Comment 1 Mark J. Cox 2004-07-02 07:05:52 UTC 
Embargo moved to Jul02 1000MEST
Comment 2 Mark J. Cox 2004-07-02 07:59:20 UTC 
Removing embargo
Comment 3 John Flanagan 2004-08-18 14:41:58 UTC 
An errata 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-2004-327.html