-----BEGIN PGP SIGNED MESSAGE----- =============================================================================== Security Advisory CERT-NL =============================================================================== Author/Source : Niels den Otter Index : S-98-78 Distribution : World Page : 1 Classification: External Version: 1 Subject : SGI IRIX fcagent vulnerability Date : 18-Dec-98 =============================================================================== By courtesy of Silicon Graphics, Inc. we received information on their IRIX fcagent daemon. A vulnerability in the fcagent(1m) daemon has been discovered which can lead to a denial of service that can disable the FibreVault. CERT-NL recommends to install the patches outlined below. ______________________________________________________________________________ Silicon Graphics Inc. Security Advisory Title: Vulnerability in IRIX fcagent daemon Number: 19981201-01-PX Date: December 10,1998 ______________________________________________________________________________ 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 IRIX fcagent(1m) service is an RPC based daemon which is called to service requests about status or configuration of a FibreVault enclosure. Unfortunately, a vulnerability in the fcagent(1m) daemon has been discovered which can lead to a denial of service that can disable the FibreVault. 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 has been corrected in future releases of IRIX. - - -------------- - - --- Impact --- - - -------------- The fcagent(1m) daemon is installed by default on Origin and Onyx2 platforms running IRIX 6.4 and higher. A local user account on the vulnerable system is not required in order to exploit the fcagent(1m) daemon. The vulnerability can be exploited remotely by using carefully crafted RPC packets that are sent to the fcagent(1m) daemon. The vulnerability can be used to establish a denial of service rendering the FibreVault unavailable. This vulnerability was discovered internally by SGI and is believe not to have been publicly discussed outside of SGI. - - -------------------------- - - --- 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 disable the fcagent(1m) daemon thereby removing the vulnerability until patches can be installed. ================= **** WARNING **** ================= Disabling the fcagent(1m) daemon will prevent configuration and status monitoring of the FibreVault enclosure. 1) Become the root user on the system. % /bin/su - Password: # 2) Verify fcagent(1m) daemon is enabled. # chkconfig Flag State ==== ===== fcagent on 3) Disable fcagent(1m) daemon. # chkconfig fcagent off 4) Verify fcagent(1m) daemon has been disabled. # chkconfig Flag State ==== ===== fcagent off 5) Stop any currently running fcagent(1m) daemon. # /etc/init.d/fcagent stop 6) Return to previous level. # exit % - - ---------------- - - --- Solution --- - - ---------------- OS Version Vulnerable? Patch # Other Actions ---------- ----------- ------- ------------- IRIX 3.x no Note 1 IRIX 4.x no Note 1 IRIX 5.0.x no Note 1 IRIX 5.1.x no Note 1 IRIX 5.2 no Note 1 IRIX 5.3 no Note 2 IRIX 6.0.x no Note 1 IRIX 6.1 no Note 1 IRIX 6.2 no IRIX 6.3 no Note 2 IRIX 6.4 yes 3440 Note 2 & 3 IRIX 6.5 yes 6.5.2 Note 3 & 4 IRIX 6.5.1 yes 6.5.2 Note 3 & 4 IRIX 6.5.2 no Note 5 NOTES 1) Upgrade to currently supported IRIX operating system. See http://support.sgi.com/news/irix2.html for more information. 2) This version of the IRIX operating system is in maintenance mode and patches will no longer be produced when it retires. See http://support.sgi.com/news/irix1.html for more information. 3) See "Temporary Solution" section. 4) IRIX 6.5.2 needs to be installed to remove this vulnerability. 5) If you have not received an IRIX 6.5.2 CD for IRIX 6.5, contact your SGI Support Provider or download the IRIX 6.5.2 Maintenance Release Stream from http://support.sgi.com/ or ftp://patches.sgi.com/support/relstream/ Information about installing IRIX 6.5.2 can be found at: http://support.sgi.com/6.5/installing.html Patches are available via anonymous FTP and your service/support provider. The primary SGI anonymous FTP site for security information and patches is sgigate.sgi.com (204.94.209.1). Security information and patches can be found in the ~ftp/security and ~ftp/patches directories, respectively. For security and patch management reasons, ftp.sgi.com (mirror of sgigate) lags behind and does not do a real-time update of ~ftp/security and ~ftp/patches ##### Patch File Checksums #### The actual patch will be a tar file containing the following files: Filename: README.patch.3440 Algorithm #1 (sum -r): 04125 25 README.patch.3440 Algorithm #2 (sum): 27101 25 README.patch.3440 MD5 checksum: E24670EF4CAEC9FAA245D98F71BA10FD Filename: patchSG0003440 Algorithm #1 (sum -r): 51443 6 patchSG0003440 Algorithm #2 (sum): 6348 6 patchSG0003440 MD5 checksum: 675AD6BEAB8C42B3EA1546A5007803F8 Filename: patchSG0003440.eoe_man Algorithm #1 (sum -r): 23082 50 patchSG0003440.eoe_man Algorithm #2 (sum): 38976 50 patchSG0003440.eoe_man MD5 checksum: 4AD4D5A60D28FD2635CA424109652A5A Filename: patchSG0003440.eoe_sw Algorithm #1 (sum -r): 55220 1145 patchSG0003440.eoe_sw Algorithm #2 (sum): 13442 1145 patchSG0003440.eoe_sw MD5 checksum: 87A6651CA9A03767EA18BCEEBD689D1C Filename: patchSG0003440.idb Algorithm #1 (sum -r): 10193 12 patchSG0003440.idb Algorithm #2 (sum): 27908 12 patchSG0003440.idb MD5 checksum: 4CC99C3F82F35F989BEEBDBFC7C3C02A Filename: patchSG0003440.irix_dev_gifts Algorithm #1 (sum -r): 06478 6 patchSG0003440.irix_dev_gifts Algorithm #2 (sum): 6724 6 patchSG0003440.irix_dev_gifts MD5 checksum: AA15FAE1A7D6D95B16328C0C37951F3B - - ----------------------------------------------------------- - - --- Silicon Graphics Inc. 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