MCI Telecommunications internetMCI Security Group Report Title: iMCI MIIGS Security Alert Report Name: NIS Vulnerability Report Number: iMCISE:IMCISUN:10299701:P1R1 Report Date: 10/29/97 Report Format: Formal Report Classification: MCI Informational Report Reference: http://www.security.mci.net Report Distribution: iMCI Security, MCI Internal Internet Gateway Security (MIIGS), MCI Emergency Alert LiSt (MEALS) (names on file) -------------------------------------------------------------------------- ============================================================================ ==== SunService SUNSOLVE EARLYNOTIFIER(SM) ALERT SunSolve EarlyNotifier Alert is published periodically to provide SunService customers with the latest and most important technical information regarding Sun hardware and software. ****************************************************************************** Sun Microsystems, Inc. Security Bulletin Bulletin Number: #00155 Date: October 28, 1997 Cross-Ref: Title: nis_cachemgr ____________________________________________________________________________ ____ 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 2.5.1, 2.5, and 2.4 (SunOS 5.5.1, 5.5, and 5.4) which relate to a vulnerability in nis_cachemgr. Sun estimates that the release of a patch for Solaris 2.3 (SunOS 5.3) that relate to the same vulnerability will be available within 4 weeks of the date of this bulletin. Sun strongly recommends that you install the patches listed in section 4 immediately on systems running SunOS 5.5.1, 5.5, and 5.4 which use NIS+. 2. Who is Affected Vulnerable: SunOS versions 5.5.1, 5.5.1_x86, 5.5, 5.5_x86, 5.4, 5.4_x86, 5.3 Not vulnerable: All other supported versions of SunOS. The vulnerability does not exist in Solaris 2.6. 3. Understanding the Vulnerability NIS+ clients run nis_cachemgr, a NIS+ utility that caches location information about NIS+ servers. This vulnerability, if exploited, allows attackers to add bogus directory objects to the global shared cache, in effect specifying rogue NIS+ servers that are under their control. 4. List of Patches The vulnerability in nis_cachemgr is fixed by the following patches: OS version Patch ID __________ ________ SunOS 5.5.1 103612-33 SunOS 5.5.1_x86 103613-32 SunOS 5.5 103187-29 SunOS 5.5_x86 103188-29 SunOS 5.4 101973-32 SunOS 5.4_x86 101974-32 SunOS 5.3 101318-89 (to be released in 4 weeks) 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 _______________ __________ __________ ________________________________ 103612-33.tar.Z 42409 3248 60555 6495 63408A137DBE6BEEDAECFA49674F0E5A 103613-32.tar.Z 08972 2939 41390 5878 E613588ADA2845DA2CEDE801FE247ED2 103187-29.tar.Z 47938 3240 14585 6479 D681C0BB1C4267418AEB20F56DDE7FD3 103188-29.tar.Z 36871 2919 14150 5838 F7184B433BF9EDCBA99E81D2039F355A 101973-32.tar.Z 55144 956 44485 1911 A802DA901090B52A27BDC6AE0D386C13 101974-32.tar.Z 41770 826 48991 1652 91AB26639B6CB0902ADE354999751826 ______________________________________________________________________________ APPENDICES A. Patches listed in this bulletin are available to all Sun customers via World Wide Web at: Customers with Sun support contracts can also obtain patches from local Sun Solution Centers and SunSITEs worldwide. B. Sun security bulletins are available via World Wide Web at: C. Sun Security Coordination Team's PGP key is available via World Wide Web at: D. 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For a complete list of patches, check the patch reports in the EarlyNotifier data collection on SunSolve. http://www.security.mci.net ================================================================