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AUSCERT External Security Bulletin Redistribution
ESB-2005.0592 -- Sun Alert Notification 101807
Security Vulnerability In the Multilanguage Environment
Library "libmle" Shipped with the Japanese Locale
27 July 2005
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AusCERT Security Bulletin Summary
---------------------------------
Product: libmle
Publisher: Sun Microsystems
Operating System: Solaris 8
Solaris 7
Platform: SPARC
Impact: Increased Privileges
Access: Existing Account
Original Bulletin:
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-101807-1
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Sun(sm) Alert Notification
* Sun Alert ID: 101807
* Synopsis: Security Vulnerability In the Multilanguage Environment
Library "libmle" Shipped with the Japanese Locale
* Category: Security
* Product: Solaris 7 Operating System, Solaris 8 Operating System
* BugIDs: 4468138
* Avoidance: Patch, Workaround
* State: Resolved
* Date Released: 25-Jul-2005
* Date Closed: 25-Jul-2005
* Date Modified:
1. Impact
A security vulnerability in the multilanguage environment library,
"libmle" (shipped with the Japanese locale) may allow a local
unprivileged user to be able to execute arbitrary code or commands
with elevated privileges. The code or commands executed by the user
would run with the privileges of the application dynamically linked to
the libmle library.
2. Contributing Factors
This issue can occur in the following releases:
SPARC Platform
* Solaris 7 without patch 111646-01
* Solaris 8 without patch 111647-01
Notes:
1. Solaris 9 and Solaris 10 are not affected by this issue.
2. Solaris on the x86 platform is not affected by this issue.
3. Systems without the SUNWjbcp package are not affected by this
issue. The SUNWjbcp package includes libraries and input method
systems to run Japanese SunOS 4.x binaries on Solaris 2.x. The
Solaris installer installs the SUNWjbcp package if the user
instructs the installer to install one or more Japanese locales.
4. Running any BCP applications that are linked with the Japanese
BCPlibmle library and which have the "set user ID bit" (suid) or
the "setgroup ID bit" (sgid), or which run as root and accept
input from non-privileged users, may allow this vulnerability to
be exploited. This includes the "kkcv" and "ccv" daemon processes,
meaning that systems with one or both of these processes running
are at risk. The Japanese BCP libmle library and the "kkcv" and
"ccv" daemons are included in the SUNWjbcp package.
To check if the SUNWjbcp package is installed, the following command
can be run:
$ pkginfo SUNWjbcp
system SUNWjbcp Japanese (EUC) SunOS 4.x Binary Compatibility
To check if "/usr/4lib/libmle.so" is a link to the Japanese BCP libmle
library, the "file -h" command can be run as in the following example:
$ file -h /usr/4lib/libmle.so*
/usr/4lib/libmle.so.1.4: symbolic link to locale/ja/libmle.so.1.4
To check if an application is linked with the BCP libmle library, the
ldd(1) command can be used. In the output, a line listing
"/usr/4lib/libmle.so" indicates that the application uses the BCP
libmle library and is a BCP application.
To check if the kkcv or ccv processes are running, both of which can
be vulnerable to this issue, the following command can be run:
$ ps -fe | egrep 'kkcv|ccv'
3. Symptoms
There are no symptoms that would indicate the described issue has been
exploited to gain unauthorized root access to a system.
4. Relief/Workaround
If programs that are compiled on Japanese SunOS 4.x will not be used
on the system, the SUNWjbcp package can be removed with the following
command:
# pkgrm SUNWjbcp
5. Resolution
This issue is addressed in the following releases:
SPARC Platform
* Solaris 7 with patch 111646-01 or later
* Solaris 8 with patch 111647-01 or later
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 2000-2005 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved
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