From agent99@boytoy.csd.sgi.com Wed Jun 17 18:17:21 1998 From: SGI Security Coordinator To: agent99@sgi.com Date: Wed, 17 Jun 1998 12:54:56 -0700 Subject: IRIX mediad(1M) Vulnerability DISTRIBUTION RESTRICTIONS - NONE - FOR PUBLIC RELEASE -----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ Silicon Graphics Inc. Security Advisory Title: IRIX mediad(1M) Vulnerability Number: 19980602-01-PX Date: June 17, 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 mediad(1M) daemon is used to monitor removable media devices on Silicon Graphics Inc. (SGI) platforms. Unfortunately, a vulnerability has been discovered in the default behavior of the mediad(1M) program that can lead to a root compromise of 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 mediad(1M) daemon is installed by default on all IRIX 5.1 through IRIX 6.4 systems. Physical access to the removable media devices on the system and a local account is required in order to exploit the mediad(1M) vulnerability locally and remotely. It is believed that this vulnerability has not been publically discussed. - --------------------------- - ---- 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 deactivating the mediad(1M) program. 1) Become the root user on the system. % /bin/su - Password: # 2) Stop the currently running mediad(1M) daemon. # /etc/init.d/mediad stop ************ *** NOTE *** ************ With this workaround in place, removable media devices will need to be mounted manually (see man mount(1M)). 3) Turn off mediad(1M) during system start up. # chkconfig mediad off ************ *** NOTE *** ************ After installing the patch, the mediad(1M) daemon needs to be reactivated during system startup with "chkconfig mediad on". 4) Return to the 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 yes not avail Note 1 & 2 IRIX 5.2 yes not avail Note 1 & 2 IRIX 5.3 yes 3191 & 3189 Note 3 IRIX 6.0.x yes not avail Note 1 & 2 IRIX 6.1 yes not avail Note 1 & 2 IRIX 6.2 yes 3192 & 3190 Note 3 IRIX 6.3 yes 3109 IRIX 6.4 yes 2891 IRIX 6.5 no NOTES 1) Upgrade to currently supported IRIX operating system. 2) See "Temporary Solution" section. 3) Both patches must be installed to fix this vulnerability. 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.2891 Algorithm #1 (sum -r): 65078 14 README.patch.2891 Algorithm #2 (sum): 8485 14 README.patch.2891 MD5 checksum: 6CC3D4F3BE85D06B617F2B3BC5E1238A Filename: patchSG0002891 Algorithm #1 (sum -r): 57624 7 patchSG0002891 Algorithm #2 (sum): 20791 7 patchSG0002891 MD5 checksum: 6223FA28BD1DBA56D5B23460C333B46E Filename: patchSG0002891.eoe_man Algorithm #1 (sum -r): 27548 213 patchSG0002891.eoe_man Algorithm #2 (sum): 56163 213 patchSG0002891.eoe_man MD5 checksum: 65AC7DF8E13EB22CCCF0396B14DF6DDC Filename: patchSG0002891.eoe_sw Algorithm #1 (sum -r): 45137 1334 patchSG0002891.eoe_sw Algorithm #2 (sum): 48791 1334 patchSG0002891.eoe_sw MD5 checksum: 5B41401985E06CCA4D9CA6047FAA24E6 Filename: patchSG0002891.idb Algorithm #1 (sum -r): 25936 14 patchSG0002891.idb Algorithm #2 (sum): 42399 14 patchSG0002891.idb MD5 checksum: F132FA43FE61F4029366B98EF046327F Filename: README.patch.3109 Algorithm #1 (sum -r): 24400 15 README.patch.3109 Algorithm #2 (sum): 63902 15 README.patch.3109 MD5 checksum: 9C48F6AE738A3F4292FD0D6F000715AA Filename: patchSG0003109 Algorithm #1 (sum -r): 46958 9 patchSG0003109 Algorithm #2 (sum): 39809 9 patchSG0003109 MD5 checksum: F65CE9E7A3A5B6D2076296083581A22B Filename: patchSG0003109.dev_sw Algorithm #1 (sum -r): 46222 178 patchSG0003109.dev_sw Algorithm #2 (sum): 23608 178 patchSG0003109.dev_sw MD5 checksum: C5D0EEE1B926775061D010539492FF5A Filename: patchSG0003109.eoe_man Algorithm #1 (sum -r): 64305 193 patchSG0003109.eoe_man Algorithm #2 (sum): 53808 193 patchSG0003109.eoe_man MD5 checksum: 82D8BB5FCF5A92DD05F10A0D396C8624 Filename: patchSG0003109.eoe_sw Algorithm #1 (sum -r): 52088 2937 patchSG0003109.eoe_sw Algorithm #2 (sum): 51862 2937 patchSG0003109.eoe_sw MD5 checksum: A792DD15489134388DF31F0F034D776B Filename: patchSG0003109.idb Algorithm #1 (sum -r): 48217 18 patchSG0003109.idb Algorithm #2 (sum): 20609 18 patchSG0003109.idb MD5 checksum: EFA2C899D4C7F96DF14943565A635097 Filename: README.patch.3189 Algorithm #1 (sum -r): 18440 8 README.patch.3189 Algorithm #2 (sum): 40866 8 README.patch.3189 MD5 checksum: B2DB0593855AE0616424A9ACEFB9472C Filename: patchSG0003189 Algorithm #1 (sum -r): 23323 1 patchSG0003189 Algorithm #2 (sum): 29291 1 patchSG0003189 MD5 checksum: 67B68302F224057E26F8C529E4BCE85F Filename: patchSG0003189.eoe2_sw Algorithm #1 (sum -r): 16009 89 patchSG0003189.eoe2_sw Algorithm #2 (sum): 2007 89 patchSG0003189.eoe2_sw MD5 checksum: CDAE8AC5BFE7153C0C86B35850FE6988 Filename: patchSG0003189.idb Algorithm #1 (sum -r): 10773 1 patchSG0003189.idb Algorithm #2 (sum): 36164 1 patchSG0003189.idb MD5 checksum: 58EFBA4F9DF09BE37AF0438C5BE49401 Filename: README.patch.3190 Algorithm #1 (sum -r): 46303 8 README.patch.3190 Algorithm #2 (sum): 33172 8 README.patch.3190 MD5 checksum: 50A5ADF39FA1F9E1AD25550BFCC2D54F Filename: patchSG0003190 Algorithm #1 (sum -r): 01530 1 patchSG0003190 Algorithm #2 (sum): 36083 1 patchSG0003190 MD5 checksum: 8F34CF99C67D0D227D327E4DE44D40FF Filename: patchSG0003190.eoe_sw Algorithm #1 (sum -r): 14428 92 patchSG0003190.eoe_sw Algorithm #2 (sum): 26222 92 patchSG0003190.eoe_sw MD5 checksum: 1ACA704D3473FB27E1F41E52C8A66425 Filename: patchSG0003190.idb Algorithm #1 (sum -r): 05639 1 patchSG0003190.idb Algorithm #2 (sum): 36623 1 patchSG0003190.idb MD5 checksum: F9CD42450BC0278E7A4E2A5D5E1C2015 Filename: README.patch.3191 Algorithm #1 (sum -r): 06248 11 README.patch.3191 Algorithm #2 (sum): 31452 11 README.patch.3191 MD5 checksum: 50E04AA8709A56B3D882B26B990E58BB Filename: patchSG0003191 Algorithm #1 (sum -r): 04873 7 patchSG0003191 Algorithm #2 (sum): 45621 7 patchSG0003191 MD5 checksum: B1DD09FD9CA77204DD0816A9D733FEDD Filename: patchSG0003191.cadmin_sw Algorithm #1 (sum -r): 24160 706 patchSG0003191.cadmin_sw Algorithm #2 (sum): 25993 706 patchSG0003191.cadmin_sw MD5 checksum: 75EFC916866460DB0CE205B781BD3DFF Filename: patchSG0003191.eoe1_man Algorithm #1 (sum -r): 24451 12 patchSG0003191.eoe1_man Algorithm #2 (sum): 4655 12 patchSG0003191.eoe1_man MD5 checksum: 7B690D29231DD4401845369CF88B080E Filename: patchSG0003191.eoe1_sw Algorithm #1 (sum -r): 07943 6 patchSG0003191.eoe1_sw Algorithm #2 (sum): 58262 6 patchSG0003191.eoe1_sw MD5 checksum: D13FA81DF060BE27DA6F0478CA4D0476 Filename: patchSG0003191.eoe2_sw Algorithm #1 (sum -r): 23461 135 patchSG0003191.eoe2_sw Algorithm #2 (sum): 9315 135 patchSG0003191.eoe2_sw MD5 checksum: 4BF6904EDCBB08A6C52664DABAE80817 Filename: patchSG0003191.idb Algorithm #1 (sum -r): 21800 3 patchSG0003191.idb Algorithm #2 (sum): 48342 3 patchSG0003191.idb MD5 checksum: 889A725DA53EADA27B4C2E65F22A3296 Filename: README.patch.3192 Algorithm #1 (sum -r): 14737 9 README.patch.3192 Algorithm #2 (sum): 25649 9 README.patch.3192 MD5 checksum: 6CEF0C3571C086FBEC1E4FE8EF761DD2 Filename: patchSG0003192 Algorithm #1 (sum -r): 47927 3 patchSG0003192 Algorithm #2 (sum): 18593 3 patchSG0003192 MD5 checksum: 9251DC46B0F1EC1E783C40BB7EEF9D12 Filename: patchSG0003192.eoe_man Algorithm #1 (sum -r): 60164 13 patchSG0003192.eoe_man Algorithm #2 (sum): 53577 13 patchSG0003192.eoe_man MD5 checksum: 7999BF4A4E20EA3EAB1AF82DBC233293 Filename: patchSG0003192.eoe_sw Algorithm #1 (sum -r): 10318 160 patchSG0003192.eoe_sw Algorithm #2 (sum): 30308 160 patchSG0003192.eoe_sw MD5 checksum: E2382D48673F2C3D15BAB821F5D570F7 Filename: patchSG0003192.idb Algorithm #1 (sum -r): 30067 2 patchSG0003192.idb Algorithm #2 (sum): 61532 2 patchSG0003192.idb MD5 checksum: 360AA4EF675AA8EFEBB1B5CDE3534017 - ------------------------- - ---- 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. ------oOo------ Silicon Graphics provides security information and patches for use by the entire SGI community. This information is freely available to any person needing the information and is available via anonymous FTP and the Web. The primary SGI anonymous FTP site for security information and patches is sgigate.sgi.com (204.94.209.1). Security information and patches are located under the directories ~ftp/security and ~ftp/patches, respectively. The Silicon Graphics Security Headquarters Web page is accessible at the URL http://www.sgi.com/Support/security/security.html. For issues with the patches on the FTP sites, email can be sent to cse-security-alert@sgi.com. For assistance obtaining or working with security patches, please contact your SGI support provider. ------oOo------ Silicon Graphics provides a free security mailing list service called wiretap and encourages interested parties to self-subscribe to receive (via email) all SGI Security Advisories when they are released. Subscribing to the mailing list can be done via the Web (http://www.sgi.com/Support/security/wiretap.html) or by sending email to SGI as outlined below. % mail wiretap-request@sgi.com subscribe wiretap end ^d In the example above, is the email address that you wish the mailing list information sent to. The word end must be on a separate line to indicate the end of the body of the message. The control-d (^d) is used to indicate to the mail program that you are finished composing the mail message. ------oOo------ Silicon Graphics provides a comprehensive customer World Wide Web site. This site is located at http://www.sgi.com/Support/security/security.html. ------oOo------ For reporting *NEW* SGI security issues, email can be sent to security-alert@sgi.com or contact your SGI support provider. A support contract is not required for submitting a security report. ______________________________________________________________________________ This information is provided freely to all interested parties and may be redistributed provided that it is not altered in any way, Silicon Graphics is appropriately credited and the document retains and includes its valid PGP signature. -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBNYgZ2bQ4cFApAP75AQGiCQP9GuKAdC0oErfW7d2aYGPBQjVu4kshAoxw VwYsneAX2ZeyxaBzwoOQSYQ/EoNAnFe0EgMBx4zclq0E7Ildh52abcbMN1wIfkD6 pPJmCudR5Gcewb+XbxIEK3Jse+e6YegrOECVjy0bkvvbpRls0brDtMsAl1Us0NPt 5CRJ8WOJ6TI= =iIOP -----END PGP SIGNATURE-----