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SunOS Syscall on Intel Platforms Allows Local Users to Obtain Root Level Privileges
SecurityTracker Alert ID: 1001548|
SecurityTracker URL: http://securitytracker.com/id/1001548
(Links to External Site)
Date: May 15 2001
Execution of arbitrary code via local system, Root access via local system, User access via local system|
Fix Available: Yes Vendor Confirmed: Yes |
Version(s): Intel Platform Edition of Solaris 8, 7, and 2.6 (SunOS 5.8_x86, 5.7_x86, and 5.6_x86)|
Sun Microsystems issued a security bulletin warning of a vulnerability in the Intel Platform Edition of Solaris. The security hole allows local users to elevate their privileges, possibly gaining root level privileges on the server. The Sparc versions are not affected.|
Sun provides no details, but indicates that a local user can supply carefully constructed arguments to a syscall to obtain higher privilege than authorized. This could reportedly be used to control arbitrary addresses in kernel memory (which, presumably, could allow root-level access).
The Intel i386 architecture supports a hardware-based protection and segmentation model which allows different levels of privilege. The vulnerability relates to this functionality.
Sun notes that the Intel Platform Editions of Trusted Solaris 8 and 7 are also vulnerable.
Sun reports that all SPARC Platform Editions of Solaris are not vulnerable and any Intel Platform Editions of Solaris prior to 2.6 are also not vulnerable.
A local user can elevate their privileges, possibly gaining root level privileges on the server.|
The vendor has released a fix. See the Source Message for details.|
Vendor URL: sunsolve.sun.com/security (Links to External Site)
UNIX (Solaris - SunOS)|
Source Message Contents
Date: Tue, 15 May 2001 12:59:29 PDT|
Subject: Sun Security Bulletin #00202
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Sun Microsystems, Inc. Security Bulletin
Bulletin Number: #00202
Date: May 15, 2001
Title: i386 syscalls
The information contained in this Security Bulletin is provided "AS IS."
Sun makes no warranties of any kind whatsoever with respect to the information
contained in this Security Bulletin. ALL EXPRESS OR IMPLIED CONDITIONS,
REPRESENTATIONS AND WARRANTIES, INCLUDING ANY WARRANTY OF NON-INFRINGEMENT OR
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE
HEREBY DISCLAIMED AND EXCLUDED TO THE EXTENT ALLOWED BY APPLICABLE LAW.
IN NO EVENT WILL SUN MICROSYSTEMS, INC. BE LIABLE FOR ANY LOST REVENUE,
PROFIT OR DATA, OR FOR DIRECT, SPECIAL, INDIRECT, CONSEQUENTIAL, INCIDENTAL
OR PUNITIVE DAMAGES HOWEVER CAUSED AND REGARDLESS OF ANY THEORY OF LIABILITY
ARISING OUT OF THE USE OF OR INABILITY TO USE THE INFORMATION CONTAINED IN
THIS SECURITY BULLETIN, EVEN IF SUN MICROSYSTEMS, INC. HAS BEEN ADVISED OF
THE POSSIBILITY OF SUCH DAMAGES.
If any of the above provisions are held to be in violation of applicable law,
void, or unenforceable in any jurisdiction, then such provisions are waived
to the extent necessary for this disclaimer to be otherwise enforceable in
1. Bulletins Topics
This issue is only present on the Intel Platform Edition of
Sun announces the release of patches for Intel Platform Editions
of Solaris(tm) 8, 7, and 2.6 (SunOS(tm) 5.8_x86, 5.7_x86, and 5.6_x86)
which relate to a vulnerability in user-supplied arguments to a syscall
on i386 platforms.
Sun recommends that you install the patches listed in section 4
immediately on systems running SunOS 5.8_x86, 5.7_x86, and 5.6_x86.
or Trusted Solaris 8_x86 and 7_x86.
2. Who is Affected
Vulnerable: Intel Platform Edition of Solaris 8, 7,
and 2.6 (SunOS 5.8_x86, 5.7_x86, and 5.6_x86).
Intel Platform Edition of Trusted Solaris 8
Not vulnerable: All SPARC Platform Editions of Solaris and
Intel Platform Editions of Solaris prior
3. Understanding the Vulnerability
The Intel i386 architecture supports a protection and segmentation
model which allows different levels of privilege. Carefully
constructed arguments could allow access to higher privilege than
intended which could be used to control arbitrary addresses in kernel
4. List of Patches
The following patches are available in relation to the above problems.
OS Version Patch ID
SunOS 5.8_x86 108529-07
SunOS 5.7_x86 106542-16
SunOS 5.6_x86 105182-27 (Scheduled availability June 18, 2001)
TS8_x86 110338-02 (available soon)
TS7_x86 109597-05 (available soon)
A. Patches listed in this bulletin are available to all Sun customers at:
B. Checksums for the patches listed in this bulletin are available at:
C. Sun security bulletins are available at:
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E. To report or inquire about a security problem with Sun software, contact
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Copyright 2001 Sun Microsystems, Inc. All rights reserved. Sun,
Sun Microsystems, Solaris and SunOS are trademarks or registered trademarks
of Sun Microsystems, Inc. in the United States and other countries. This
Security Bulletin may be reproduced and distributed, provided that this
Security Bulletin is not modified in any way and is attributed to
Sun Microsystems, Inc. and provided that such reproduction and distribution
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