Published:
02 February 1999
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-1999.008 -- SGI Security Advisory 19990201-01-I IRIX 6.5 Security Features 03 February 1999 =========================================================================== Silicon Graphics Inc. has released the following advisory concerning security features available in the IRIX 6.5 operating system. - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ Silicon Graphics Inc. Security Advisory Title: IRIX 6.5 Security Features Number: 19990201-01-I Date: February 2, 1999 ______________________________________________________________________________ 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. ______________________________________________________________________________ There has been some confusion on what security features are available in the IRIX 6.5 operating system. To clarify the situation, Silicon Graphics, Inc. provides the following information. - - ----------------------- - - --- Issue Specifics --- - - ----------------------- With the release of the IRIX 6.5 operating system, several new security features were introduced that were previously only available as separately purchased, optional products. Additionally, several existing security features were enhanced. Together, the new base set of security features for IRIX 6.5 has caused some confusion. This informational advisory is not designed to be a tutorial, but an introduction to the additions and changes in the base set of security features normally found in IRIX operating system. 1) Access Control Lists (ACLs), /sbin/chacl This security feature for the XFS filesystem was first introduced in Trusted IRIX and Commercial Security Pak (CSP). It is now a standard part of IRIX 6.5 and is installed by default from eoe.sw.acl from the IRIX 6.5 CD. ACLs extend the standard file permissions to allow finer control on a user-by-user basis. For more information on ACLs, see man chacl(1) or chapter 4 of the IRIX Admin: Backup, Security, and Accounting guide available as an online book. 2) Least-Privilege Capabilities, /etc/capability and /etc/irix.cap This security concept was first introduced in Trusted IRIX and is now a standard part of the IRIX 6.5 operating system. Least-Privilege Capabilities assigns specific privileges to accounts to perform operations formerly reserved for the superuser. For more information on Least-Privilege Capabilities, see man chcap(1) or chapter 4 of the IRIX Admin: Backup, Security, and Accounting guide available as an online book. 3) System Manager, /usr/sysadm/bin/sysmgr As of IRIX 6.3, the System Manager has been revised to include the Security and Access Control panel. Under IRIX 6.5, this panel includes the Improve System Security tool, the Permissions Manager and the Privilege Manger security tools. More information on these tools can be found in the help menu on the System Manager. 4) Trusted IRIX (TRIX or TIRIX) Compartmented Mode Workstation (CMW) 6.5 As of IRIX 6.5, Trusted IRIX/CMW is no longer a separate operating system. Trusted IRIX/CMW is now a separately purchased, optional add-on product for IRIX 6.5. This means patches for IRIX 6.5 will work with Trusted IRIX/CMW. Trusted IRIX/CMW conforms to standard TCSEC B3 feature set, but with assurance of security at the B1 level. Trusted IRIX/CMW 6.5 is under evaluation for the B1 security rating from the NCSC. IRIX 6.5 is under evaluation for the C2 security rating. - - ----------------- - - --- Reference --- - - ----------------- Books IRIX Admin: Backup, Security, and Accounting http://techpubs.sgi.com/library/lib/makepage.cgi?007-2862-003 Trusted IRIX®/CMW Security Administrator's Guide http://techpubs.sgi.com/library/lib/makepage.cgi?007-3299-002 URLs NCSC Commercial Products Evaluation http://www.radium.ncsc.mil/tpep/ SGI Freeware (sudo, tcp wrappers, nfswatch, etc. compiled binaries for IRIX) http://freeware.sgi.com/ SGI Security Information Silicon Graphics Security Headquarters http://www.sgi.com/Support/security/ If your sites security policy does not allow http service due to the risks associated with web browsers, SGI Security Advisories and patches are available via ftp. Security Advisories and security patches via ftp: ftp://sgigate.sgi.com/security/ ftp://sgigate.sgi.com/patches/ ftp://sgigate.sgi.com/security/os_patch_cross_ref Recommended/Required Patches and 6.5 Maintenance Release Streams http://support.sgi.com/ ftp://support.sgi.com/ - - ----------------------------------------------------------- - - --- 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 <YourEmailAddress> end ^d In the example above, <YourEmailAddress> 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 iQCVAwUBNrd7l7Q4cFApAP75AQHmjwP+L0iWmcJ/Orum0WG6jF0mcm15GwKZ9Wwi XvvrZs7y3q/vyQZwnKlx1uy3B/ctXWS9DLmgAf5Dxii0/AqGRrWDZl07YKA767pm 7UqHmiUL652Iw8jyTkUeMDfCplclUlHRcgE8r5xD+lEK76nxOcn8r0xgmJFL0abD /fOAxD78aRY= =t3zw - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for emergencies. -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key iQCVAwUBNr7EHih9+71yA2DNAQEIKwP+IJsyXt24dVJ2Bh02plFO99PLOylvMaHP 5hLXjdNP/5TmhFPFyneGHBm3l35PJYv0a6MNLGAMcrHBp6j21zVIYlS4CFQtGYhr J7HMgWRgjwKk/cvkoj1tCzLSjlq3NMeVD94NTWdUxRw1wh4P3pCaIH19odVYlQiU xm0+zLYh/I0= =3VF+ -----END PGP SIGNATURE-----