Bug 603593 (CVE-2010-2071) - CVE-2010-2071 kernel: btrfs: prevent users from setting ACLs on files they do not own
Summary: CVE-2010-2071 kernel: btrfs: prevent users from setting ACLs on files they do...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2010-2071
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 603594
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-06-14 02:08 UTC by Eugene Teo (Security Response)
Modified: 2012-03-28 08:51 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2012-03-28 08:51:28 UTC


Attachments (Terms of Use)

Description Eugene Teo (Security Response) 2010-06-14 02:08:58 UTC
Description of problem:
http://lkml.org/lkml/2010/5/17/544

On btrfs, do the following
------------------
# su user1
# cd btrfs-part/
# touch aaa
# getfacl aaa
  # file: aaa
  # owner: user1
  # group: user1
  user::rw-
  group::rw-
  other::r--
# su user2
# cd btrfs-part/
# setfacl -m u::rwx aaa
# getfacl aaa
  # file: aaa
  # owner: user1
  # group: user1
  user::rwx           <- successed to setfacl
  group::rw-
  other::r--
------------------
but we should prohibit it that user2 changing user1's acl.
In fact, on ext3 and other fs, a message occurs:
  setfacl: aaa: Operation not permitted

Upstream commit:
http://git.kernel.org/linus/2f26afba

Comment 1 Eugene Teo (Security Response) 2010-06-14 02:09:28 UTC
Meanwhile, we should also include http://git.kernel.org/linus/731e3d1b.

Comment 3 Eugene Teo (Security Response) 2010-06-14 02:11:28 UTC
Statement:

Not vulnerable. This issue did not affect the versions of Linux kernel as
shipped with Red Hat Enterprise Linux 3, 4, 5 and Red Hat Enterprise MRG as
they did not include support for Btrfs, a new copy on write filesystem.

Comment 4 Fedora Update System 2010-07-08 18:22:57 UTC
kernel-2.6.33.6-147.fc13 has been pushed to the Fedora 13 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2010-07-13 07:48:39 UTC
kernel-2.6.32.16-141.fc12 has been pushed to the Fedora 12 stable repository.  If problems still persist, please make note of it in this bug report.


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