(Red Hat Issues Fix) X Font Server Temporary File Race Conditions Lets Local Users Gain Elevated Privileges
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SecurityTracker Alert ID: 1018378 |
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SecurityTracker URL: http://securitytracker.com/id/1018378
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CVE Reference:
CVE-2007-3103
(Links to External Site)
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Date: Jul 12 2007
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Impact:
Root access via local system
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Fix Available: Yes Vendor Confirmed: Yes
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Description:
A vulnerability was reported in the X Font Server. A local user can obtain elevated privileges on the target system.
The init.d X Font Server script does not properly modify the permissions of a temporary file. A local user can exploit this to change the permissions of arbitrary files to world writable.
iDefense reported this vulnerability.
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Impact:
A local user can obtain root privileges on the target system.
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Solution:
Red Hat has released a fix.
The Red Hat advisory is available at:
https://rhn.redhat.com/errata/RHSA-2007-0520.html
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Vendor URL: www.x.org/ (Links to External Site)
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Cause:
Access control error, State error
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Underlying OS:
Linux (Red Hat Enterprise)
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Thu, 12 Jul 2007 06:30:23 -0400
Subject: [RHSA-2007:0520-01] Moderate: xorg-x11-xfs security update
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
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Red Hat Security Advisory
Synopsis: Moderate: xorg-x11-xfs security update
Advisory ID: RHSA-2007:0520-01
Advisory URL: https://rhn.redhat.com/errata/RHSA-2007-0520.html
Issue date: 2007-07-12
Updated on: 2007-07-12
Product: Red Hat Enterprise Linux
CVE Names: CVE-2007-3103
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1. Summary:
Updated X.org packages that address a flaw in the way the X.Org X11 xfs
font server starts are now available for Red Hat Enterprise Linux 5.
This update has been rated as having moderate security impact by the Red
Hat Security Response Team.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
3. Problem description:
The X.Org X11 xfs font server provides a standard mechanism for an X server
to communicate with a font renderer.
A temporary file flaw was found in the way the X.Org X11 xfs font server
startup script executes. A local user could modify the permissions of a
file of their choosing, possibly elevating their local privileges.
(CVE-2007-3103)
Users of the X.org X11 xfs font server should upgrade to these updated
packages, which contain a backported patch and are not vulnerable to this
issue.
4. Solution:
Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.
This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/FAQ_58_10188
5. Bug IDs fixed (http://bugzilla.redhat.com/):
242903 - CVE-2007-3103 init.d xfs script chown race condition vulnerability
6. RPMs required:
Red Hat Enterprise Linux Desktop (v. 5 client):
SRPMS:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/xorg-x11-xfs-1.0.2-4.src.rpm
7f6d90098c6a752c16894315b85e739e xorg-x11-xfs-1.0.2-4.src.rpm
i386:
94318ae2d5f02439c58541c5a9c34314 xorg-x11-xfs-1.0.2-4.i386.rpm
8880bbe448c5d423e2056800b56e3636 xorg-x11-xfs-debuginfo-1.0.2-4.i386.rpm
1e54d7037ede3c1a5476d3ad65b62eb0 xorg-x11-xfs-utils-1.0.2-4.i386.rpm
x86_64:
434fb4f47152e671d0c59b9b677295a8 xorg-x11-xfs-1.0.2-4.x86_64.rpm
091aefa331d43036745b55d90c59a4b4 xorg-x11-xfs-debuginfo-1.0.2-4.x86_64.rpm
6cea61c7098202810b812aba74e8610c xorg-x11-xfs-utils-1.0.2-4.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
SRPMS:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/xorg-x11-xfs-1.0.2-4.src.rpm
7f6d90098c6a752c16894315b85e739e xorg-x11-xfs-1.0.2-4.src.rpm
i386:
94318ae2d5f02439c58541c5a9c34314 xorg-x11-xfs-1.0.2-4.i386.rpm
8880bbe448c5d423e2056800b56e3636 xorg-x11-xfs-debuginfo-1.0.2-4.i386.rpm
1e54d7037ede3c1a5476d3ad65b62eb0 xorg-x11-xfs-utils-1.0.2-4.i386.rpm
ia64:
9657c080a0362243369a9b54f5207851 xorg-x11-xfs-1.0.2-4.ia64.rpm
1ae3c7834e7e591c3e13b8babb1f9485 xorg-x11-xfs-debuginfo-1.0.2-4.ia64.rpm
346da7e5c6d4660d510016d44fabc095 xorg-x11-xfs-utils-1.0.2-4.ia64.rpm
ppc:
2a140017df1fefae7828547975f0d48a xorg-x11-xfs-1.0.2-4.ppc.rpm
8eb1e6ded2137a78a7258d16f823f2bd xorg-x11-xfs-debuginfo-1.0.2-4.ppc.rpm
703f21661da66e60c38a2356643078f6 xorg-x11-xfs-utils-1.0.2-4.ppc.rpm
s390x:
faaacf77fde117b6c71afcb60c7c9508 xorg-x11-xfs-1.0.2-4.s390x.rpm
4a56c7298da2c1ece7ce05a076989637 xorg-x11-xfs-debuginfo-1.0.2-4.s390x.rpm
86b097cc09ab2ab9a7687755950b7279 xorg-x11-xfs-utils-1.0.2-4.s390x.rpm
x86_64:
434fb4f47152e671d0c59b9b677295a8 xorg-x11-xfs-1.0.2-4.x86_64.rpm
091aefa331d43036745b55d90c59a4b4 xorg-x11-xfs-debuginfo-1.0.2-4.x86_64.rpm
6cea61c7098202810b812aba74e8610c xorg-x11-xfs-utils-1.0.2-4.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package
7. References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3103
http://www.redhat.com/security/updates/classification/#moderate
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://www.redhat.com/security/team/contact/
Copyright 2007 Red Hat, Inc.
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