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- ===========================================================================
- CA-92:15 CERT Advisory
- July 21, 1992
- Multiple SunOS Vulnerabilities Patched
-
- ---------------------------------------------------------------------------
-
- The CERT/CC (Computer Emergency Response Team/Coordination Center) has
- received information concerning several vulnerabilities in the Sun
- Microsystems, Inc. (Sun) operating system (SunOS). These vulnerabilities
- affect all architectures and supported versions of SunOS including 4.1,
- 4.1.1, and 4.1.2 on sun3, sun3x, sun4, sun4c, and sun4m. The patches have
- been released as upgrades to three existing patch files.
-
- Since application of these patches involves rebuilding your system kernel
- file (/vmunix), it is recommended that you apply all patches simultaneously.
- Use the procedure described below to apply the patches and rebuild the kernel.
-
- Sun has provided patches for these vulnerabilities as updates to
- Patch IDs 100173, 100376, and 100567. They are available through your local
- Sun Answer Centers worldwide as well as through anonymous ftp from the
- ftp.uu.net (137.39.1.9) system (in the /systems/sun/sun-dist directory).
-
- Fix Patch ID Filename Checksum
- NFS Jumbo 100173-08 100173-08.tar.Z 32716 562
- Integer mul/div 100376-04 100376-04.tar.Z 12884 100
- ICMP redirects 100567-02 100567-02.tar.Z 23118 13
-
- Please note that Sun Microsystems sometimes updates patch files. If you
- find that the checksum is different please contact Sun Microsystems or CERT
- for verification.
-
- ---------------------------------------------------------------------------
-
- NFS jumbo patch upgrade, SunOS 4.1, 4.1.1, 4.1.2, all architectures
-
- I. Description
-
- The upgrade to the NFS Jumbo patch addresses a vulnerability that
- allows an intruder to become root using NFS. This vulnerability
- affects all architectures and supported versions of SunOS.
-
- II. Impact
-
- A remote user may exploit this vulnerability to gain root access.
-
- III. Solution
-
- Extract the new files to be installed in the kernel.
-
- Install the patch files in /sys/`arch -k`/OBJ as described in the
- README file included in the patch file. Be sure to make a backup
- of each of the files you are replacing before moving the patched
- file to the /sys/`arch -k`/OBJ directory.
-
- Config, make, and install the new kernel to include all patches
- described in this advisory appropriate to your system. Reboot
- each host using the appropriate kernel. Refer to the Systems and
- Network Administration manual for instructions on building and
- configuring a new custom kernel.
-
-
- Integer mul/div patch upgrade, SunOS 4.1, 4.1.1, 4.1.2, SPARC architectures
-
- I. Description
-
- The integer mul/div patch upgrade addresses an additional problem with
- the integer multiplication emulation code on SPARC architectures that
- allows an intruder to become root. This vulnerability affects SPARC
- architectures (sun4, sun4c, and sun4m) for all supported versions of
- SunOS (4.1, 4.1.1, and 4.1.2).
-
- II. Impact
-
- A local user may exploit a bug in the emulation routines to gain
- root access or crash the system.
-
- III. Solution
-
- Extract the new files to be installed in the kernel. Note that
- this patch applies only to SPARC architectures.
-
- Install the patch files in /sys/`arch -k`/OBJ as described in the
- README file included in the patch file. Be sure to make a backup
- of each of the files you are replacing before moving the patched
- file to the /sys/`arch -k`/OBJ directory.
-
- Config, make, and install the new kernel to include all patches
- described in this advisory appropriate to your system. Reboot
- each host using the appropriate kernel. Refer to the Systems and
- Network Administration manual for instructions on building and
- configuring a new custom kernel.
-
-
- ICMP redirects patch upgrade, SunOS 4.1, 4.1.1, 4.1.2, all architectures
-
- I. Description
-
- The ICMP redirects patch addresses a denial of service vulnerability
- with SunOS that allows an intruder to close existing network
- connections to and from a Sun system. This vulnerability affects all
- Sun architectures and supported versions of SunOS.
-
- II. Impact
-
- A remote user may deny network services on a Sun system.
-
- III. Solution
-
- Extract the new file to be installed in the kernel (the patch is
- the same for all supported versions of SunOS).
-
- Install the patch files in /sys/`arch -k`/OBJ as described in the
- README file included in the patch file. Be sure to make a backup
- of each of the files you are replacing before moving the patched
- file to the /sys/`arch -k`/OBJ directory.
-
- Config, make, and install the new kernel to include all patches
- described in this advisory appropriate to your system. Reboot
- each host using the appropriate kernel. Refer to the Systems and
- Network Administration manual for instructions on building and
- configuring a new custom kernel.
-
- ---------------------------------------------------------------------------
- The CERT/CC wishes to thank Helen Rose of the EFF, Gordon Irlam of the
- University of Adelaide, Wietse Venema of Eindhoven University, and Ken
- Pon at Sun Microsystems, Inc for their assistance.
- ---------------------------------------------------------------------------
-
- If you believe that your system has been compromised, contact CERT/CC or
- your representative in FIRST (Forum of Incident Response and Security Teams).
-
- Internet E-mail: cert@cert.org
- Telephone: 412-268-7090 (24-hour hotline)
- CERT/CC personnel answer 7:30 a.m.-6:00 p.m. EST(GMT-5)/EDT(GMT-4),
- on call for emergencies during other hours.
-
- Computer Emergency Response Team/Coordination Center (CERT/CC)
- Software Engineering Institute
- Carnegie Mellon University
- Pittsburgh, PA 15213-3890
-
- Past advisories, information about FIRST representatives, and other
- information related to computer security are available for anonymous ftp
- from cert.org (192.88.209.5).
-
-