FedCIRC Advisory FA-99-11 Originally released: July 19, 1999 Source: CERT/CC Systems Affected * IRIX systems running the Array Services daemon * UNICOS systems running the Array Services daemon I. Description A vulnerability has been discovered in the default configuration of the Array Services daemon, arrayd. Array Services are used to manage a cluster of systems. The default configuration file, arrayd.auth, disables authentication and does not provide adequate protection for systems connected to an untrusted network. SGI has published the following document describing the vulnerability and solutions: [1]ftp://sgigate.sgi.com/security/19990701-01-P II. Impact On systems installed with the default configuration, remote and local users can execute arbitrary commands as root. III. Solution Use "SIMPLE" authentication Reconfigure arrayd to use "SIMPLE" authentication. For more information about reconfiguring arrayd, please see the [2]SGI security bulletin. Disable the arrayd daemon If you do not need the capabilities provided by the arrayd daemon, you may wish to disable the daemon. _________________________________________________________________ The CERT Coordination Center would like to thank Yuri Volobuev and the SGI Security Team for their assistance in preparing this advisory. ______________________________________________________________________ This document is available from: [3]http://www2.fedcirc.gov/advisories/FA-99-11.html ______________________________________________________________________ FedCIRC Contact Information Email: [4]fedcirc@fedcirc.gov Phone: +1 888-282-0870 (24-hour toll-free hotline) Phone: +1 412-268-6321 (24-hour hotline) Fax: +1 412-268-6989 Postal address: FedCIRC CERT Coordination Center Software Engineering Institute Carnegie Mellon University Pittsburgh PA 15213-3890 U.S.A. FedCIRC personnel answer the hotline 08:00-20:00 EST(GMT-5) / EDT(GMT-4) Monday through Friday; they are on call for emergencies during other hours, on U.S. holidays, and on weekends. Using encryption We strongly urge you to encrypt sensitive information sent by email. Our public PGP key is available from [5]http://www2.fedcirc.gov/keys.html If you prefer to use DES, please call the FedCIRC hotline for more information. Getting security information FedCIRC publications and other security information are available from our web site [6]http://www.fedcirc.gov/ FedCIRC (Federal Computer Incident Response Capability) is operated by the CERT/CC for the U.S. General Services Administration. FedCIRC provides security services to U.S. Federal civilian agencies. Copyright 1999 Carnegie Mellon University. Conditions for use, disclaimers, and sponsorship information can be found in [7]http://www.cert.org/legal_stuff.html * "CERT" and "CERT Coordination Center" are registered in the U.S. Patent and Trademark Office. ______________________________________________________________________ NO WARRANTY Any material furnished by Carnegie Mellon University and the Software Engineering Institute is furnished on an "as is" basis. Carnegie Mellon University makes no warranties of any kind, either expressed or implied as to any matter including, but not limited to, warranty of fitness for a particular purpose or merchantability, exclusivity or results obtained from use of the material. Carnegie Mellon University does not make any warranty of any kind with respect to freedom from patent, trademark, or copyright infringement. Revision History July 19, 1999: Initial release References 1. ftp://sgigate.sgi.com/security/19990701-01-P 2. ftp://sgigate.sgi.com/security/19990701-01-P 3. http://www2.fedcirc.gov/advisories/FA-99-11.html 4. mailto:fedcirc@fedcirc.gov 5. http://www2.fedcirc.gov/keys.html 6. http://www.fedcirc.gov/ 7. http://www.cert.org/legal_stuff.html