Date: 16 January 2001
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AUSCERT External Security Bulletin Redistribution
ESB-2001.019 -- Security Bulletin #00200
arp
16 January 2001
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AusCERT Security Bulletin Summary
---------------------------------
Product: arp
Vendor: Sun Microsystems
Operating System: Solaris 7, 7_x86,
2.6, 2.6_x86,
2.5.1, 2.5.1_x86,
2.5, 2.5_x86,
2.4, 2.4_x86
Impact: Root Compromise
Access Required: Local
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________________________________________________________________________________
Sun Microsystems, Inc. Security Bulletin
Bulletin Number: #00200
Date: January 12, 2001
Cross-Ref: Bugtraq ID 2193
Title: arp
________________________________________________________________________________
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
such jurisdiction.
________________________________________________________________________________
1. Bulletins Topics
Sun announces the release of patches for Solaris(tm) 7, 2.6, 2.5.1,
2.5, and 2.4 (SunOS(tm) 5.7, 5.6, 5.5.1, 5.5, and 5.4) which relate
to a setgid vulnerability in arp.
2. Who is Affected
Versions of arp in Solaris prior to Solaris 8
Vulnerable: Solaris 7, 7_x86, 2.6, 2.6_x86, 2.5.1,
2.5.1_x86, 2.5, 2.5_x86, 2.4, 2.4_x86
Not vulnerable: Solaris 8.
3. Understanding the Vulnerability
The arp program displays and modifies the Internet-to-Ethernet address
translation tables used by the address resolution protocol (arp). Prior
to Solaris 8, arp was setgid making it susceptible to certain setgid
attacks.
A malicious user could overflow the stack and execute shellcode which
could allow unauthorized root access.
4. List of Patches
The following patches are available in relation to the above problem.
OS Version Patch ID
__________ _________
SunOS 5.7 109709-01
SunOS 5.7_x86 109710-01
SunOS 5.6 109719-01
SunOS 5.6_x86 109720-01
SunOS 5.5.1 109721-01
SunOS 5.5.1_x86 109722-01
SunOS 5.5 109707-01
SunOS 5.5_x86 109708-01
SunOS 5.4 109723-01
SunOS 5.4_x86 109724-01
________________________________________________________________________________
Sun acknowledges, with thanks, Dave Ahmed of Security-Focus.com and Pablo Sor
from the AFIP Computer Security Department for their assistance with this
matter.
http://www.securityfocus.com/bid/2193
________________________________________________________________________________
APPENDICES
A. Patches listed in this bulletin are available to all Sun customers at:
http://sunsolve.sun.com/securitypatch
B. Checksums for the patches listed in this bulletin are available at:
ftp://sunsolve.sun.com/pub/patches/CHECKSUMS
C. Sun security bulletins are available at:
http://sunsolve.sun.com/security
D. Sun Security Coordination Team's PGP key is available at:
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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
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