-----BEGIN PGP SIGNED MESSAGE----- =============================================================================== Security Advisory CERT-NL =============================================================================== Author/Source : Nico de Koo Index : S-97-60 Distribution : World Page : 1 Classification: External Version: 1 Subject : SUN: Vulnerability in NIS+ Date : 07-Aug-97 =============================================================================== By courtesy of Sun Microsystems and CIAC we received information on a vulnerability in Sun's NIS+ CERT-NL recommends application of the patches listed in section 4. ______________________________________________________________________________ Sun Microsystems, Inc. Security Bulletin Bulletin Number: #00148 Date: July 30 Title: Vulnerability in NIS+ ______________________________________________________________________________ Permission is granted for the redistribution of this Bulletin, so long as the Bulletin is not edited and is attributed to Sun Microsystems. Portions may also be excerpted for re-use in other security advisories so long as proper attribution is included. Any other use of this information without the express written consent of Sun Microsystems is prohibited. Sun Microsystems expressly disclaims all liability for any misuse of this information by any third party. ______________________________________________________________________________ 1. Bulletins Topics Sun announces the release of patches for Solaris 2.4 and 2.3 (SunOS 5.4 and 5.3) which relate to a vulnerability in NIS+. Sun strongly recommends that you install the patches listed in section 4 immediately on systems running SunOS 5.4 and 5.3 which use NIS+. 2. Who is Affected Vulnerable: SunOS versions 5.4, 5.4_x86, and 5.3 which use NIS+. Not Vulnerable: SunOS 4.1.3_U1, 4.1.4, 5.5, 5.5_x86, 5.5.1, 5.5.1_x86, and the upcoming version of Solaris. 3. Understanding the Vulnerability NIS+ is a network-wide name service that runs under Solaris. It can be selected as the name service in /etc/nsswitch.conf. If NIS+ is selected, programs with setuid root permissions will link nss_nisplus.so.1 which is susceptible to a buffer overflow vulnerability. This vulnerability may allow non-privileged users to gain root privileges. 4. List of Patches The vulnerability in NIS+ is fixed by the following patches: OS version Patch ID __________ ________ SunOS 5.4 102277-03 SunOS 5.4_x86 102278-03 SunOS 5.3 101736-04 5. Checksum Table The checksum table below shows the BSD checksums (SunOS 5.x: /usr/ucb/sum), SVR4 checksums (SunOS 5.x: /usr/bin/sum), and the MD5 digital signatures for the above-mentioned patches that are available from: These checksums may not apply if you obtain patches from your answer centers. File Name BSD SVR4 MD5 _______________ ________ _________ ________________________________ 102277-03.tar.Z 10681 76 2019 152 4585727103680C70301D2F7679C9EA6D 102278-03.tar.Z 52108 76 53872 151 5040EB6980280C729051927BFB5C8130 101736-04.tar.Z 27381 77 18741 153 0AC81583908220A4D92CF5C091D6212C ______________________________________________________________________________ CERT-NL wishes to acknowledge the contributions of Sun Microsystems, Inc. for the information contained in this bulletin. ============================================================================== 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). All CERT-NL material is available under: http://www.surfnet.nl/surfnet/security/cert-nl.html ftp://ftp.surfnet.nl/surfnet/net-security In case of computer or network security problems please contact your local CERT/security-team or CERT-NL (if your institute is NOT a SURFnet customer please address the appropriate (local) CERT/security-team). CERT-NL is one/two hour(s) ahead of UTC (GMT) in winter/summer, i.e. UTC+0100 in winter and UTC+0200 in summer (DST). Email: cert-nl@surfnet.nl ATTENDED REGULARLY ALL DAYS Phone: +31 302 305 305 BUSINESS HOURS ONLY Fax: +31 302 305 329 BUSINESS HOURS ONLY Snailmail: SURFnet bv Attn. CERT-NL P.O. 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: 2.6.3i Charset: cp850 iQCVAwUBM+m9G0U5nQkWIq1FAQEaCgQAr8nT39gRnMGATAE7EGpOz3xO0YkqT1tZ 9wmSBXirTRc1rIZy3irfjmL9Cw4sxyxOLwbOuRPjbY+8bxH7ucQvTgSVSblx4Doy 2QKWf3V1w28GhCBhUr58ThfeFJq4ze6yO8Qp5dSyH28QEnqFT8accq6Uo80hiH0w AM0WA28LdIE= =wS44 -----END PGP SIGNATURE-----