-----BEGIN PGP SIGNED MESSAGE----- =============================================================================== Security Advisory CERT-NL =============================================================================== Author/Source : Niels den Otter Index : S-98-77 Distribution : World Page : 1 Classification: External Version: 1 Subject : SunOS vulnerability in bind Date : 18-Dec-98 =============================================================================== By courtesy of Sun Microsystems we received information on a vulnerability in Sun's bind. CERT-NL recommends to install the patches as advised by Sun. ________________________________________________________________________________ Sun Microsystems, Inc. Security Bulletin Bulletin Number: #00180 Date: December 17, 1998 Cross-Ref: CERT Advisory CA-98.05 Title: BIND ________________________________________________________________________________ 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. Background The Berkeley Internet Name Domain (BIND) is an implementation of the Domain Name System (DNS). CERT Advisory CA-98.05 describes three vulnerabilities in certain versions of BIND. The first vulnerability, Inverse Query Buffer Overrun, can be exploited by a remote attacker to gain root access to a DNS name server. The second vulnerability, Denial-of-Service Vulnerabilities, is concerned with buffer overflows that can be exploited to corrupt DNS record data or crash the DNS server. SunOS(tm) and Solaris(tm) are not vulnerable to third vulnerability described in the CERT advisory. For more information about the vulnerabilities, please see the CERT advisory at: http://www.cert.org/ftp/cert_advisories/CA-98.05.bind_problems A vulnerability has also been discovered in SunOS and Solaris's implementation of BIND with their use of temporary files. This vulnerability can be exploited to overwrite arbitrary files. 2. Affected Supported Versions Solaris(tm) versions: 2.6, 2.6_x86, 2.5.1, 2.5.1_x86, 2.5, 2.5_x86, 2.4, 2.4_x86 and 2.3 SunOS(tm) versions: 4.1.4 and 4.1.3_U1 3. Recommendations Sun recommends that you install the respective patches immediately on vulnerable systems including both DNS clients and servers. Operating System Patch ID _________________ _________ Solaris 2.6 105755-07 Solaris 2.6_x86 105756-07 Solaris 2.5.1 103663-15 Solaris 2.5.1_x86 103664-15 Solaris 2.5 103667-11 Solaris 2.5_x86 103668-11 Solaris 2.4 102479-13 Solaris 2.4_x86 102480-11 Solaris 2.3 101359-10 SunOS 4.1.4 106866-02 SunOS 4.1.3_U1 106865-02 _______________________________________________________________________________ APPENDICES A. Patches listed in this bulletin are available to all Sun customers via World Wide Web at: B. Checksums for the patches listed in this bulletin are available via World Wide Web at: C. Sun security bulletins are available via World Wide Web at: D. Sun Security Coordination Team's PGP key is available via World Wide Web at: 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. 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To subscribe, supply the following in the subject line (not body): subscribe cws your-email-address Note that your-email-address should be substituted by your email address. unsubscribe Sender is removed from the CWS mailing list. ________________________________________________________________________________ Copyright 1998 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 is performed for non-commercial purposes. ============================================================================== CERT-NL thanks SUN Microsystems, Inc for bringing this information to our attention. ============================================================================== CERT-NL is the Computer Emergency Response Team for SURFnet customers. SURFnet is the Dutch network for educational, research and related institutes. CERT-NL is a member of the Forum of Incident Response and Security Teams (FIRST). 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Box 19035 NL - 3501 DA UTRECHT The Netherlands NOODGEVALLEN: 06 52 87 92 82 ALTIJD BEREIKBAAR EMERGENCIES : +31 6 52 87 92 82 ATTENDED AT ALL TIMES CERT-NL'S EMERGENCY PHONENUMBER IS ONLY TO BE USED IN CASE OF EMERGENCIES: THE SURFNET HELPDESK OPERATING THE EMERGENCY NUMBER HAS A *FIXED* PROCEDURE FOR DEALING WITH YOUR ALERT AND WILL IN REGULAR CASES RELAY IT TO CERT-NL IN AN APPROPRIATE MANNER. CERT-NL WILL THEN CONTACT YOU. ============================================================================== -----BEGIN PGP SIGNATURE----- Version: 2.6.3ia Charset: latin1 iQCVAwUBNnpSTlpSTqmIRWKVAQEiDwQAqY+rZIZNTu8F3+tgwU8pWhNcBraIJ9n1 JL7fLhn5JLcE0/EFz7N4CUiIfhmFKCE/UhgRjuLc5ClpLsIeZlNgQT5AEYJ+1sWV hRxLiBO3dnHPQkjJKx8zHQmK905GrDvwfOkjmCSvNiuuqXZB04UNoQ+TNbJt+zIQ lxCDV+HksJs= =TBLf -----END PGP SIGNATURE-----