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- The Computer Incident Advisory Capability
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- _____________________________________________________
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- Information Bulletin
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- Increasing Security on Your UNICOS System
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- March 5, 1100 PST Number B-17
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- Critical UNICOS Information
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- ________________________________________________________________________
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- PROBLEM: Some UNICOS systems have not installed all patches that may
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- have security implications
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- PLATFORM: Many versions of the Cray UNICOS operating system
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- DAMAGE: Possibility that some UNICOS systems are not operating as
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- securely as possible
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- SOLUTIONS: Install UNICOS patches that apply to your version of UNICOS
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- _______________________________________________________________________
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- CIAC has been working with Cray Research Corporation as well as Cray
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- users in the DOE community to determine which basic set of UNICOS
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- patches provides a baseline level of security in UNICOS systems. The
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- patches described below have been identified as important in assuring
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- that this baseline level has been met. Some of these patches have been
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- the subject of Cray alert bulletins (Cray Field Alerts), each of which
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- (if applicable) will be referenced as each patch is identified. You
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- may contact Cray for additional information in obtaining, installing,
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- and assuring that these patches have been installed on your UNICOS
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- system.
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- The mods listed below are Cray binary files available to correct each
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- described problem. These mods are available on the crayamid system.
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- Each UNICOS mod has a unique identification. For example, Cray mod
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- d15567cmda) and is appropriate to specific versions of the UNICOS
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- operating system. Unless otherwise stated, the mod will apply to the
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- entire family of Cray hardware, including Cray-1, X-MP, Y-MP, and
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- Cray-2.
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- 1. Cray mod d15567cmda, UNICOS version 5.0/5.1
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- Modifies the command /bin/du . Alternatively, removing the SETUID bit
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- from the /bin/du command by executing the following command as root
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- will effectively replace the need for the above mod:
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- chmod 0755 /bin/du
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- 2. Cray mod d18028, UNICOS version 5.0/5.1
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- Modifies the command /etc/nu. This mod has been integrated in the
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- baseline operating system for Cray-1/XMP/YMP at version 5.1.8d and
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- Version 5.1.8 for Cray-2. For more details, see Cray Field Alert #93.
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- 3. Cray mod e13159utsa, UNICOS version 4.0, 4.EA, 5.0
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- This patch was the subject of Cray Field Alert #72. The patch modifies
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- the read/write and reada/writea system calls. A copy of the mod may be
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- found on the crayamid system under
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- /u/mods/unicos_x/5.0/uts/e13159utsa.
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- 4. Limited buffer space in the kernel for some entries.
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- This problem has been corrected with the following mods. CIAC
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- recommends that you install any mods that apply to your system.
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- UNICOS 5.1: XMP d19646utsa
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- Cray-2 d19647inca
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- XMP, Cray-2 d19648tcpa
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- UNICOS 6.0 XMP 60uts07182a
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- XMP 60uts07187a
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- XMP, Cray-2 60uts07186a
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- Cray-2 60uts07184a
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- UNICOS 6.1 XMP 61uts07182a
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- XMP 61uts07187a
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- XMP,Cray-2 61uts07186a
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- Cray-2 61uts07184a
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- CIAC recommends that you install any mods (listed above) appropriate to
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- your UNICOS system. In addition, you should upgrade your version of
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- UNICOS to the most recent available, since many improvements to the
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- security of your system have been integrated into the most recent base
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- operating system.
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- For additional information or assistance, please contact CIAC:
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- Tom Longstaff
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- (415) 423-4416 or (FTS) 543-4416, or
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- Eugene Schultz
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- (415) 422-7781 or (FTS) 532-7781
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- Call CIAC at (415) 422-8193 or (FTS) 532-8193 or send
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- e-mail to ciac@cheetah.llnl.gov
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- Send FAX messages to: (415) 423-0913 or (FTS) 543-0913
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- Karis Forster and Chuck Athey provided information contained in this
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- bulletin. Neither the United States Government nor the University of
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- California nor any of their employees, makes any warranty, expressed
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- or implied, or assumes any legal liability or responsibility for the
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- accuracy, completeness, or usefulness of any information, product, or
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- process disclosed, or represents that its use would not infringe
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- privately owned rights. Reference herein to any specific commercial
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- products, process, or service by trade name, trademark manufacturer,
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- or otherwise, does not necessarily constitute or imply its
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- endorsement, recommendation, or favoring by the United States
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- Government or the University of California. The views and opinions of
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- authors expressed herein do not necessarily state or reflect those of
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- the United States Government nor the University of California, and
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- shall not be used for advertising or product endorsement purposes.
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