-----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 to CERT-NL information contained in this advisory are therefore outdated.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 : Teun Nijssen Index : S-98-30 Distribution : World Page : 1 Classification: External Version: 1 Subject : SGI IRIX 6.3 NetWare Client 1.0 Date : 28-May-98 =============================================================================== By courtesy of Silicon Graphics, Inc. we received information on their IRIX 6.3 NetWare Client 1.0 CERT-NL recommends to install the patches outlined below in the section temporary solution. ______________________________________________________________________________ Silicon Graphics Inc. Security Advisory Title: IRIX 6.3 NetWare Client 1.0 Vulnerabilities Number: 19980501-01-P2869 Date: May 27th, 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 --- ------------------------ The NetWare Client subsystem provides software to communicate with NetWare Servers with file sharing and remote printing capabilities. Unfortunately, several vulnerabilities have been discovered with NetWare Client 1.0 on IRIX 6.3 which can lead to a root compromise on the system. 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 NetWare Client 1.0 software subsystem is installed by default on IRIX 6.3. A user account on the vulnerable system is required in order to exploit NetWare Client 1.0 locally and remotely which can lead to root access. 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 NetWare Client 1.0 programs. 1) Become the root user on the system. % /bin/su - Password: # 2) Verify a vulnerable NetWare Client 1.0 software subsystem is installed. Only NetWare Client 1.0 on IRIX 6.3 is vulnerable. # versions -b netwr_client I = Installed, R = Removed Name Date Description I netwr_client 04/30/97 NetWare Client 1.0 3) Change the permissions on the vulnerable NetWare Client 1.0 programs. # /bin/chmod 500 /usr/etc/netware/ipxchk # /bin/chmod 500 /usr/etc/netware/ipxlink 4) Verify the new permissions on the program. Note that the program sizes may be different depending on release. # ls -l /usr/etc/netware/ipxchk -r-x------ 1 root sys 9076 Feb 18 13:50 ipxchk # ls -l /usr/etc/netware/ipxlink -r-x------ 1 root sys 21412 Feb 18 13:50 ipxlink 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 no IRIX 6.0.x no IRIX 6.1 no IRIX 6.2 no IRIX 6.3 yes 2869 IRIX 6.4 no 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.2869 Algorithm #1 (sum -r): 52839 9 README.patch.2869 Algorithm #2 (sum): 1764 9 README.patch.2869 MD5 checksum: 1236AB82847EC3E53277B70989766F47 Filename: patchSG0002869 Algorithm #1 (sum -r): 52950 3 patchSG0002869 Algorithm #2 (sum): 40584 3 patchSG0002869 MD5 checksum: 8164932F4667258378598852C64090BC Filename: patchSG0002869.idb Algorithm #1 (sum -r): 12067 6 patchSG0002869.idb Algorithm #2 (sum): 30180 6 patchSG0002869.idb MD5 checksum: A33FB43AADBC15B98ABF42079BB63336 Filename: patchSG0002869.netwr_client_sw Algorithm #1 (sum -r): 08086 210 patchSG0002869.netwr_client_sw Algorithm #2 (sum): 55842 210 patchSG0002869.netwr_client_sw MD5 checksum: 49C619A6FA7FBA9102D1C566C9B1E736 Filename: patchSG0002869.sysadmdesktop_sw Algorithm #1 (sum -r): 22870 690 patchSG0002869.sysadmdesktop_sw Algorithm #2 (sum): 28194 690 patchSG0002869.sysadmdesktop_sw MD5 checksum: 4932DB35E7C275CC846B31293A0BE5F6 ------------------------- ---- Acknowledgments --- ------------------------- Silicon Graphics wishes to thank AUSCERT and the Internet community at large for their assistance in this matter. ------------------------------------------------------------ ---- Silicon Graphics Inc. 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