[ SOURCE: http://www.secureroot.com/security/advisories/9795498921.html ] -----BEGIN PGP SIGNED MESSAGE----- ________________________________________________________________________________ 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: http://sunsolve.sun.com/pgpkey.txt E. To report or inquire about a security problem with Sun software, contact one or more of the following: - Your local Sun answer centers - Your representative computer security response team, such as CERT - Sun Security Coordination Team. Send email to: security-alert@sun.com F. To receive information or subscribe to our CWS (Customer Warning System) mailing list, send email to: security-alert@sun.com with a subject line (not body) containing one of the following commands: Command Information Returned/Action Taken _______ _________________________________ help An explanation of how to get information key Sun Security Coordination Team's PGP key list A list of current security topics query [topic] The email is treated as an inquiry and is forwarded to the Security Coordination Team report [topic] The email is treated as a security report and is forwarded to the Security Coordination Team. 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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 is performed for non-commercial purposes. -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBOl85oLdzzzOFBFjJAQHIsgP+P1kC4w1WfjwcdJWmIw+TspTNQ9GLBO1l li1AFPw0DjzwI5rjxtJsJtsHjhFtlH23g179EKATTJwNTZd3VEt2qrXRpHrjmsHs eX/mjP7r52zNtAOJ0l/bDYpfUww37MmGzc1GpNfMKqJ2+/c0I0+Kk+jxBMOPbe2B LQCnZkoB1Cw= =6x5K -----END PGP SIGNATURE-----