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AUSCERT External Security Bulletin Redistribution
ESB-2008.0069 -- [Solaris]
Multiple vulnerabilities in the Solaris X Window System may allow Arbitrary
Code Execution, Denial of Service or Information Disclosure
11 February 2008
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Solaris 10 and prior
Publisher: Sun Microsystems
Operating System: Solaris
Impact: Execute Arbitrary Code/Commands
Denial of Service
Access Confidential Data
Access: Remote
Existing Account
CVE Names: CVE-2007-5760 CVE-2007-5958 CVE-2007-6427
CVE-2007-6428 CVE-2007-6429 CVE-2008-0006
Ref: ESB-2008.0063
Original Bulletin:
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-103192-1
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-103200-1
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-103205-1
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-201230-1
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-200153-1
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-230901-1
Comment: This ESB contains 3 Sun Alerts relating to vulnerabilities in the
Solaris X Windows System PCF Font Handler, X Server extensions and
the Solaris X Server.
The first two alerts referenced below may lead to arbitrary code
execution or denial of service by a remote unprivileged user.
The third alert may allow
information disclosure.
Revision History: February 11 2008: Final patched released for all 3 alerts
January 23 2008: Solaris 9 patch released for 130205
January 21 2008: Initial Release
- --------------------------BEGIN INCLUDED TEXT--------------------
Solution Type: Sun Alert
Solution 201230 : A Security Vulnerability in the Solaris X Window
System (X(5)) PCF Font Handler May Lead to Execution of Arbitrary Code
or a Denial of Service (DoS) Condition
Previously Published As: 103192
Product
Solaris 9 Operating System
Solaris 10 Operating System
Solaris 8 Operating System
Bug ID: 6640505, 6640506
Date of Workaround Release: 17-Jan-2008
Date of Resolved Release: 01-FEB-2008
SA Document Body
A Security Vulnerability in the Solaris X Window System (X(5)) PCF Font Handler
(see details below)
1. Impact
A security vulnerability in the Solaris X Window System (X(5)) PCF
font handler in libfont and libXfont libraries may allow a remote
unprivileged user to crash the application or execute arbitrary code
with the privileges of the application which dynamically links to one
of these libraries. The ability to crash an application is a type of
Denial of Service (DoS).
This issue is described in the following document:
CERT VU#203220 at http://www.kb.cert.org/vuls/id/203220
CVE-2008-0006 at
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0006
2. Contributing Factors
This issue can occur in the following releases:
SPARC Platform
* Solaris 8 without patch 119067-09
* Solaris 9 without patch 112785-63 (for Xsun(1))
* Solaris 10 without patch119059-37 (for Xsun(1))
* Solaris 10 without patch 125719-07 (for Xorg(1))
x86 Platform
* Solaris 8 without patch 119068-09
* Solaris 9 without patch 112786-52 (for Xsun(1))
* Solaris 9 without patch 118908-04 (for Xorg(1))
* Solaris 10 without patch119060-36 (for Xsun(1))
* Solaris 10 without patch125720-16 (for Xorg(1))
Note: The Xorg(1) X server only ships on the x86 platform for Solaris
9 with the Sun Java Desktop System (JDS) release 2 installed, and on
Solaris 10.
To determine if JDS release 2 is installed on a Solaris 9 x86 system,
the following command can be run:
% grep distributor-version /usr/share/gnome-about/gnome-version.xml
<distributor-version>Sun Java Desktop System, Release 2</distributor-versio
n>
To determine if an application is linked with the libXfont or libfont
library, the ldd(1) utility can be utilized as in the following
examples:
$ ldd /usr/openwin/bin/Xsun | grep libfont
libfont.so.1 => /usr/openwin/server/lib/libfont.so.1
$ ldd /usr/X11/bin/Xorg | grep libXfont
libXfont.so.1 => /usr/X11/lib/X11/xserver/libXfont.so.1
2. Symptoms
There are no predictable symptoms that would indicate the described
issue has been exploited to execute arbitrary code with elevated
privileges.
If the described issue is exploited to cause a Denial of Service (DoS)
to an application which links to the libfreetype library, the
application will exit and may generate a segmentation fault error,
potentially writing a core(4) file.
4. Workaround
To work around this issue, the "noexec_user_stack" options can be used
to defeat the most common form of buffer overflow attacks that store
executable exploit code on the stack. This can be achieved by editing
the "/etc/system" file and adding the following lines:
set noexec_user_stack = 1
set noexec_user_stack_log = 1
A reboot will be necessary in order for the above change to take
effect. See system(4) for information on modifying the system
configuration information file.
5. Resolution
This issue is addressed in the following releases:
SPARC Platform
* Solaris 8 with patch 119067-09 or later (for Xsun(1))
* Solaris 9 with patch 112785-63 or later (for Xsun(1))
* Solaris 10 with patch119059-37 or later (for Xsun(1))
* Solaris 10 with patch 125719-07 or later (for Xorg(1))
x86 Platform
* Solaris 8 with patch 119068-09 or later (for Xsun(1))
* Solaris 9 with patch 112786-52 or later (for Xsun(1))
* Solaris 9 with patch118908-04 or later (for Xorg(1))
* Solaris 10 with patch119060-36 or later (for Xsun(1))
* Solaris 10 with patch125720-16 or later (for Xorg(1))
For more information on Security Sun Alerts, see Sun Infodoc
91209.
This Sun Alert notification is being provided to you on an "AS IS"
basis. This Sun Alert notification may contain information provided by
third parties. The issues described in this Sun Alert notification may
or may not impact your system(s). Sun makes no representations,
warranties, or guarantees as to the information contained herein. ANY
AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT
YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE
OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN.
This Sun Alert notification contains Sun proprietary and confidential
information. It is being provided to you pursuant to the provisions of
your agreement to purchase services from Sun, or, if you do not have
such an agreement, the Sun.com Terms of Use. This Sun Alert
notification may only be used for the purposes contemplated by these
agreements.
Copyright 2000-2008 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved
Solution Type: Sun Alert
Solution 200153 : Multiple Security Vulnerabilities in the Solaris
X Server Extensions May Lead to a Denial of Service (DoS) Condition or
Allow Execution of Arbitrary Code
Previously Published As: 103200
Product
Solaris 8 Operating System
Solaris 9 Operating System
Solaris 10 Operating System
Bug ID: 6635720, 6635721, 6635726, 6635727, 6635730, 6635732, 6635738, 6635740, 6636174
Date of Workaround Release: 17-Jan-2008
Date of Resolved Release: 01-FEB-2008
SA Document Body
Multiple Security Vulnerabilities Exist in the X11 XInput, EVI, MIT SHM and XFr
ee86-MISC Extensions (see details below)
1. Impact
Multiple security vulnerabilities exist in the X11 XInput, EVI, MIT
SHM and XFree86-MISC extensions to the Solaris X11 display server
(Xorg(1), Xsun(1), and the Solaris X11 print server (Xprt(1)). These
vulnerabilities may allow a local or remote unprivileged user who is
authorized via xhost(1) or xauth(1) to connect to the X server and
execute arbitrary code with root privileges, access arbitrary memory
within the X server's address space, or crash the X11 display server
process. The ability to crash the X11 display server is a type of
Denial of Service (DoS).
These issues are described in the following documents:
CVE-2007-6427 at
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6427
CVE-2007-6428 at
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6428
CVE-2007-6429 at
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6429
CVE-2007-5760 at
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5760
2. Contributing Factors
These issues can occur in the following releases:
SPARC Platform
* Solaris 8 without patch 119067-09
* Solaris 9 without patch 112785-63 (for Xsun(1))
* Solaris 10 without patch 119059-37-1">119059-37 (for
Xsun(1))
* Solaris 10 without patch 125719-07 (for Xorg(1))
x86 Platform
* Solaris 8 without patch 119068-09
* Solaris 9 without patch 112786-52 (for Xsun(1))
* Solaris 9 without patch 118908-04-1">118908-04 (for
Xorg(1))
* Solaris 10 without patch 119060-36-1">119060-36 (for
Xsun(1))
* Solaris 10 without patch 125720-16-1">125720-16 (for
Xorg(1))
Note: The Xorg(1) X server only ships on the x86 platform for Solaris
9 with the Sun Java Desktop System (JDS) release 2 installed, and on
Solaris 10.
To determine if JDS release 2 is installed on a Solaris 9 x86 system,
the following command can be run:
% grep distributor-version /usr/share/gnome-about/gnome-version.xml
<distributor-version>Sun Java Desktop System, Release 2</distributor-versio
n>
3. Symptoms
If any of the described issues occur, the X server will exit and may
generate an error message about a segmentation fault and may also
write a core(4) file.
4. Workaround
To work around the described issues for the Xorg(1) server, the
affected X Server extensions may be disabled.
The following command may be used to disable Xorg server extensions:
$ /usr/X11/bin/Xorg -extension <Name of Extension>
For example, the MIT-SHM extension may be disabled as follows:
$ /usr/X11/bin/Xorg -extension MIT-SHM
The X Server extensions may also be disabled by editing the
xorg.conf(4) file. For example, to disable the MIT-SHM extension, the
following lines may be added to the xorg.conf(4) file:
Section "Extensions"
Option "MIT-SHM" "disable"
EndSection
Notes:
1. After disabling X Server extensions, applications requiring those
extensions may not run.
2. Only certain extensions can be disabled by the user. To list all
extensions that can be disabled, run the following command:
$ /usr/X11/bin/Xorg -extension help
There is no workaround to the described issues for Xsun(1) server.
The documented issues can be worked around by using the
"noexec_user_stack" options to defeat the most common form of buffer
overflow attacks that store executable exploit code on the stack. This
can be achieved by editing the "/etc/system" file and adding the
lines:
set noexec_user_stack = 1
set noexec_user_stack_log = 1
A reboot will be necessary in order for the above change to take
effect. See system(4) for information on modifying the system
configuration information file.
5. Resolution
This issue is addressed in the following releases:
SPARC Platform
* Solaris 8 with patch 119067-09 or later (for Xsun(1))
* Solaris 9 with patch 112785-63 or later (for Xsun(1))
* Solaris 10 with patch 119059-37-1">119059-37 or later (for
Xsun(1))
* Solaris 10 with patch 125719-07 or later (for Xorg(1))
x86 Platform
* Solaris 8 with patch 119068-09 or later (for Xsun(1))
* Solaris 9 with patch 112786-52 or later (for Xsun(1))
* Solaris 9 with patch 118908-04-1">118908-04 or later (for
Xorg(1))
* Solaris 10 with patch 119060-36-1">119060-36 or later (for
Xsun(1))
* Solaris 10 with patch 125720-16-1">125720-16 or later (for
Xorg(1))
For more information on Security Sun Alerts, see Sun Infodoc
91209.
This Sun Alert notification is being provided to you on an "AS IS"
basis. This Sun Alert notification may contain information provided by
third parties. The issues described in this Sun Alert notification may
or may not impact your system(s). Sun makes no representations,
warranties, or guarantees as to the information contained herein. ANY
AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT
YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE
OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN.
This Sun Alert notification contains Sun proprietary and confidential
information. It is being provided to you pursuant to the provisions of
your agreement to purchase services from Sun, or, if you do not have
such an agreement, the Sun.com Terms of Use. This Sun Alert
notification may only be used for the purposes contemplated by these
agreements.
Copyright 2000-2008 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved
Solution Type: Sun Alert
Solution 230901 : Security Vulnerability in the Solaris X Server
May Lead to Unauthorized Disclosure of Information on Access
Restricted Files and Directories
Previously Published As: 103205
Product
Solaris 9 Operating System, Solaris 10 Operating System, Solaris 8 Operating Sy
stem
Bug ID: 6642763, 6642762
Date of Workaround Release: 17-Jan-2008
Date of Resolved Release: 06-FEB-2008
SA Document Body
Security Vulnerability in the Solaris X Server May Lead to Unauthorized Disclos
ure of Information on Access Restricted Files and Directories (see below for f
ull details)
1. Impact
A Security vulnerability in the Solaris X11 display server (Xorg(1)
and Xsun(1)) and the Solaris X11 print server (Xprt(1)), related to
the handling of command line options may allow a local unprivileged
user to determine the existence of files or directories in access
restricted directories. The ability to gather information on access
restricted files or directories indicates a loss of confidentiality.
This issue is described in the following document:
* CVE-2007-5958 at:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5958
2. Contributing Factors
These issues can occur in the following releases:
SPARC Platform
* Solaris 8 without patch 119067-09
* Solaris 9 without patch 112785-63 (Xsun)
* Solaris 10 without patch 119059-38 (Xsun)
* Solaris 10 without patch 125719-07 (Xorg)
x86 Platform
* Solaris 8 without patch 119068-09
* Solaris 9 without patch 112786-52 (Xsun)
* Solaris 9 without patch 118908-04 (Xorg)
* Solaris 10 without patch 119060-37 (Xsun)
* Solaris 10 without patch 125720-17 (Xorg)
3. Symptoms
There are no predictable symptoms that would indicate the described
issue has occurred.
4. Relief/Workaround
To work around the described issue, remove the setuid(2) and/or
setgid(2) bit from Xsun, Xorg and Xprt. To remove the setuid(2) and/or
setgid(2) bit from Xsun, Xorg and Xprt, the following commands can be
run as "root":
# chmod 0755 /usr/openwin/bin/Xsun /usr/openwin/bin/Xprt
# chmod 0755 /usr/X11/bin/Xorg /usr/X11/bin/i386/Xorg /usr/X11/bin/amd64/Xo
rg
Note: Not all of the above binaries may be found on all systems.
Warning: When Xsun, Xorg and Xprt are ran directly or from xinit,
removing the setuid/setgid bits from these binaries will disable:
* All ability to run Xsun on Solaris x86
* Power management for Solaris SPARC
* Interactive Process Priority control
* Xsun, Xorg and Xprt ability to open Unix domain sockets and named
pipetransports in the protected /tmp/.X11-* directories
Note: dtlogin(1X) and gdm(1m) will not be affected and will still be
able to start with the privileges of the "root" user.
5. Resolution
This issue is addressed in the following releases:
SPARC Platform
* Solaris 8 with patch 119067-09 or later
* Solaris 9 with patch 112785-63 or later (Xsun)
* Solaris 10 with patch 119059-38 or later (Xsun)
* Solaris 10 with patch 125719-07 or later (Xorg)
x86 Platform
* Solaris 8 with patch 119068-09 or later
* Solaris 9 with patch 112786-52 or later (Xsun)
* Solaris 9 with patch 118908-04 or later (Xorg)
* Solaris 10 with patch 119060-37 or later (Xsun)
* Solaris 10 with patch 125720-17 or later (Xorg)
For more information on Security Sun Alerts, see Sun Infodoc
91209.
This Sun Alert notification is being provided to you on an "AS IS"
basis. This Sun Alert notification may contain information provided by
third parties. The issues described in this Sun Alert notification may
or may not impact your system(s). Sun makes no representations,
warranties, or guarantees as to the information contained herein. ANY
AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT
YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE
OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN.
This Sun Alert notification contains Sun proprietary and confidential
information. It is being provided to you pursuant to the provisions of
your agreement to purchase services from Sun, or, if you do not have
such an agreement, the Sun.com Terms of Use. This Sun Alert
notification may only be used for the purposes contemplated by these
agreements.
Copyright 2000-2008 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved
- --------------------------END INCLUDED TEXT--------------------
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