Bug 161056

Summary: CVE-2005-2801 Lost ACLs on ext3
Product: Red Hat Enterprise Linux 3 Reporter: Bastien Nocera <bnocera>
Component: kernelAssignee: Stephen Tweedie <sct>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 3.0CC: petrides, rafiq_maniar, security-response-team
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: public=20050205,source=bk,reported=20050205,impact=moderate
Fixed In Version: RHSA-2006-0144 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2006-03-15 16:06:18 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:
Bug Depends On:    
Bug Blocks: 168424    
Attachments:
Description Flags
aclbreak.tar.gz
none
Fix false sharing between active and default ACLs none

Description Bastien Nocera 2005-06-20 10:48:59 UTC 
See attached tarball:
acltest.sh - script to reproduce the problem, needs to be edited before
execution (don't forget to update the mount options if you want to use a file
rather than a partition to reproduce the problem)
aclcheck.pl - Tool for recurively checking if acls exist on a directory
acltest_root.tgz - Some random files (copy of GPL'ed "gallery" PHP-Script)

The output should something like (which it is before umount):
# file: acltest/test/9/2
# owner: root
# group: root
user::rwx
group::---
group:daemon:--x        #effective:---
mask::r--
other::---
default:user::rwx
default:group::---
default:group:daemon:--x        #effective:---
default:mask::r--
default:other::---

The problem is reproduceable on a 2.4.21-32.0.1.EL kernel, but not on a RHEL4
system.
Comment 1 Bastien Nocera 2005-06-20 10:49:00 UTC 
Created attachment 115681 [details]
aclbreak.tar.gz
Comment 3 Bastien Nocera 2005-07-06 10:17:30 UTC 

*** This bug has been marked as a duplicate of 155473 ***
Comment 5 Bastien Nocera 2005-07-19 09:49:46 UTC 
Indeed, this isn't the same bug. Tested the above testcase with
kernel-2.4.21-32.12.EL, and the bug still exists.
Comment 7 Stephen Tweedie 2005-08-24 14:22:11 UTC 
Created attachment 118060 [details]
Fix false sharing between active and default ACLs

I've been able to reproduce the problem locally; it is fixed by this patch
backported from upstream 2.6 kernels.
Comment 8 Stephen Tweedie 2005-08-24 14:24:12 UTC 
Thanks for the clear reproducer, btw; it was very helpful in verifying this fix.
Comment 13 Ernie Petrides 2005-09-15 04:10:08 UTC 
A fix for this problem has just been committed to the RHEL3 U7
patch pool this evening (in kernel version 2.4.21-37.2.EL).
Comment 17 Red Hat Bugzilla 2006-03-15 16:06:18 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-2006-0144.html