-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =============================================================================== >> CERT-NL, 01-Mar-2000 << >> All CERT-NL information has been moved to http://cert.surfnet.nl. Links << >> to CERT-NL information contained in this advisory are therefore outdated. << >> << >> CERT-NL also has stopped the CERT-CC-Mirror service. Due to this the << >> links to the CERT-CC mirror are obsolete. Visit the CERT-CC site for the << >> complete CERT-CC advisory texts: http://www.cert.org << =============================================================================== =============================================================================== Security Advisory CERT-NL =============================================================================== Author/Source : Rene Ritzen Index : S-98-20 Distribution : World Page : 1 Classification: External Version: 1 Subject : SGI Vulnerability in IRIX LicenseManager(1M)Date : 14-Apr-98 =============================================================================== By courtesy of Silicon Graphics, Inc. we received information on a Vulnerability in IRIX LicenseManager(1M) CERT-NL recommends to install the patches outlined below in the section temporary solution. ______________________________________________________________________________ Silicon Graphics Inc. Security Advisory Title: IRIX LicenseManager(1M) Vulnerabilities Number: 19980406-01-PX Date: April 13, 1998 ______________________________________________________________________________ Silicon Graphics provides this information freely to the SGI user community for its consideration, interpretation, implementation and use. Silicon Graphics recommends that this information be acted upon as soon as possible. Silicon Graphics provides the information in this Security Advisory on an "AS-IS" basis only, and disclaims all warranties with respect thereto, express, implied or otherwise, including, without limitation, any warranty of merchantability or fitness for a particular purpose. In no event shall Silicon Graphics be liable for any loss of profits, loss of business, loss of data or for any indirect, special, exemplary, incidental or consequential damages of any kind arising from your use of, failure to use or improper use of any of the instructions or information in this Security Advisory. ______________________________________________________________________________ - - - ----------------------- - - - --- Issue Specifics --- - - - ----------------------- Under normal operation LicenseManager(1M) is a program used to view and manage FLEXlm and NetLS software licenses. Unfortunately, a set of vulnerabilities has been discovered that allows LicenseManager(1M) to arbitrary manipulate root-owned files allowing root access. Silicon Graphics Inc. has investigated the issue and recommends the following steps for neutralizing the exposure. It is HIGHLY RECOMMENDED that these measures be implemented on ALL vulnerable SGI systems. This issue will be corrected in future releases of IRIX. - - - -------------- - - - --- Impact --- - - - -------------- The LicenseManager(1M) program is installed by default from license_eoe software subsystem. license_eoe 3.0, 3.1 and 3.1.1 are vulnerable to this exploit. A user account on the vulnerable system is required in order to exploit LicenseManager(1M) locally and remotely. This vulnerability has been publically discussed in Usenet newsgroups and mailing lists. - - - -------------------------- - - - --- Temporary Solution --- - - - -------------------------- Although patches are available for this issue, it is realized that there may be situations where installing the patches immediately may not be possible. The steps below can be used to remove the vulnerability by removing the permissions of the LicenseManager(1M) program. 1) Become the root user on the system. % /bin/su - Password: # 2) Verify a vulnerable LicenseManager(1M) program is installed. Only license_eoe 3.0, 3.1 and 3.1.1 are vulnerable. # versions -b license_eoe I = Installed, R = Removed Name Date Description I license_eoe 04/30/97 License Tools 3.1.1 3) Change the permissions on the vulnerable LicenseManger(1M) program. # /bin/chmod 500 /usr/etc/LicenseManager ************ *** NOTE *** ************ Removing the permissions from the vulnerable program will prevent non-root users from accessing LicenseManager(1M). 4) Verify the new permissions on the program. Note that the program size may be different depending on release. # ls -al /usr/etc/LicenseManager -r-x------ 1 root sys 489960 Aug 12 1997 LicenseManager 5) Return to previous user level. # exit $ - - - ---------------- - - - --- Solution --- - - - ---------------- OS Version Vulnerable? Patch # Other Actions ---------- ----------- ------- ------------- IRIX 3.x no IRIX 4.x no IRIX 5.0.x no IRIX 5.1.x no IRIX 5.2 no IRIX 5.3 yes 1678 IRIX 6.0.x no IRIX 6.1 yes not avail see Note 1 IRIX 6.2 yes 1678 IRIX 6.3 yes 1695 IRIX 6.4 no NOTES 1) upgrade operating system or see "Temporary Solution" section. Patches are available via anonymous FTP and your service/support provider. The SGI anonymous FTP site is sgigate.sgi.com (204.94.209.1) or its mirror, ftp.sgi.com. Security information and patches can be found in the ~ftp/security and ~ftp/patches directories, respectfully. ##### Patch File Checksums #### The actual patch will be a tar file containing the following files: Filename: README.patch.1678 Algorithm #1 (sum -r): 17618 8 README.patch.1678 Algorithm #2 (sum): 40340 8 README.patch.1678 MD5 checksum: 906F439EF5223C3983075E81BABA9FB4 Filename: patchSG0001678 Algorithm #1 (sum -r): 59371 2 patchSG0001678 Algorithm #2 (sum): 43134 2 patchSG0001678 MD5 checksum: 0EF19CA382CE0A6AA37A00C902887FEA Filename: patchSG0001678.idb Algorithm #1 (sum -r): 57535 2 patchSG0001678.idb Algorithm #2 (sum): 53685 2 patchSG0001678.idb MD5 checksum: DF0690A6221F58AB341B454EC5AEB547 Filename: patchSG0001678.license_eoe_sw Algorithm #1 (sum -r): 34073 467 patchSG0001678.license_eoe_sw Algorithm #2 (sum): 14344 467 patchSG0001678.license_eoe_sw MD5 checksum: 4BB892CEFAB1B30E60AFBFCA60FB8973 Filename: README.patch.1695 Algorithm #1 (sum -r): 11915 8 README.patch.1695 Algorithm #2 (sum): 39231 8 README.patch.1695 MD5 checksum: 40C01BDA39D2E04BAA8D230F2FBD4448 Filename: patchSG0001695 Algorithm #1 (sum -r): 38972 2 patchSG0001695 Algorithm #2 (sum): 39704 2 patchSG0001695 MD5 checksum: DE1959B750CB6E7325098117DBE65D3A Filename: patchSG0001695.idb Algorithm #1 (sum -r): 51707 2 patchSG0001695.idb Algorithm #2 (sum): 52218 2 patchSG0001695.idb MD5 checksum: 5789D0AF24D8C0045453D0269374BD62 Filename: patchSG0001695.license_eoe_sw Algorithm #1 (sum -r): 49617 455 patchSG0001695.license_eoe_sw Algorithm #2 (sum): 32263 455 patchSG0001695.license_eoe_sw MD5 checksum: 90B7D8ACCCC1045CE77DB882748A7FC0 - - - ------------------------ - - - --- Acknowledgments --- - - - ------------------------ Silicon Graphics wishes to thank the Internet community at large for their assistance in this matter. - - - ----------------------------------------------------------- - - - --- Silicon Graphics Inc. Security Information/Contacts --- - - - ----------------------------------------------------------- If there are questions about this document, email can be sent to cse-security-alert@sgi.com. ============================================================================== 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://cert.surfnet.nl/ 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 22 92 35 64 ALTIJD BEREIKBAAR EMERGENCIES : +31 6 22 92 35 64 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: PGP 6.5.1i iQA/AwUBOL6IgTSYjBqwfc9jEQI8+gCcCqfv9hiSzYkPYTI3TZZIjqjFkVIAoNi6 ouHNUrSqQ2DhpugQALtwrzjT =puBv -----END PGP SIGNATURE-----