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- ***********************************************************************
- DDN Security Bulletin 9109 DCA DDN Defense Communications System
- 23 July 91 Published by: DDN Security Coordination Center
- (SCC@NIC.DDN.MIL) (800) 235-3155
-
- DEFENSE DATA NETWORK
- SECURITY BULLETIN
-
- The DDN SECURITY BULLETIN is distributed by the DDN SCC (Security
- Coordination Center) under DCA contract as a means of communicating
- information on network and host security exposures, fixes, & concerns
- to security & management personnel at DDN facilities. Back issues may
- be obtained via FTP (or Kermit) from NIC.DDN.MIL [192.67.67.20]
- using login="anonymous" and password="guest". The bulletin pathname is
- SCC:DDN-SECURITY-yynn (where "yy" is the year the bulletin is issued
- and "nn" is a bulletin number, e.g. SCC:DDN-SECURITY-9001).
- **********************************************************************
-
- Patch for SunOS /usr/etc/rpc.mountd
-
- + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +
- ! !
- ! The following important advisory was issued by the Computer !
- ! Emergency Response Team (CERT) and is being relayed unedited !
- ! via the Defense Communications Agency's Security Coordination !
- ! Center distribution system as a means of providing DDN !
- ! subscribers with useful security information. !
- ! !
- + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +
-
-
- CA-91:09 CERT Advisory
- July 15, 1991
- Patch for SunOS /usr/etc/rpc.mountd
-
- ---------------------------------------------------------------------------
-
- The Computer Emergency Response Team/Coordination Center (CERT/CC) has
- received information concerning the availability of a security patch
- for /usr/etc/rpc.mountd in Sun Microsystems, Inc. operating systems.
- This problem will be fixed in SunOS 5.0. Patches are available for
- SunOS 4.1, and SunOS 4.1.1 through your local Sun answer centers
- worldwide as well as through anonymous ftp to ftp.uu.net (in ~ftp/sun-dist).
- Patch ID and file information are as follows:
-
- Fix Patch ID Filename Checksum
- /usr/etc/rpc.mountd 100296-01 100296-01.tar.Z 01501 233
-
- Please note that Sun Microsystems sometimes updates patch files. If
- you find that the checksum is different please contact Sun Microsystems
- or us for verification.
- ---------------------------------------------------------------------------
-
- I. DESCRIPTION:
-
- If an access list of hosts within /etc/exports is a string
- over 256 characters then the filesystem can be mounted by
- everyone.
-
- II. IMPACT:
-
- Unauthorized remote hosts will be able to mount the filesystem.
-
- III. SOLUTION:
-
- As root:
-
- 1. Move the existing rpc.mountd aside
-
- # mv /usr/etc/rpc.mountd /usr/etc/rpc.mountd.OLD
-
- 2. Install the new version
-
- # cp sun{3,3x,4,4c}/{4.1,4.1.1,4.1_PSR_A}/rpc.mountd /usr/etc
- # chown root.staff /usr/etc/rpc.mountd
- # chmod 755 /usr/etc/rpc.mountd
-
- 3. Kill the currently running rpc.mountd and restart it, or,
- reboot the system. Systems currently mounting filesystems
- from this host will have interruptions in service either
- way.
-
- ---------------------------------------------------------------------------
-
- If you believe that your system has been compromised, contact CERT/CC via
- telephone or e-mail.
-
- Computer Emergency Response Team/Coordination Center (CERT/CC)
- Software Engineering Institute
- Carnegie Mellon University
- Pittsburgh, PA 15213-3890
-
- Internet E-mail: cert@cert.sei.cmu.edu
- Telephone: 412-268-7090 24-hour hotline:
- CERT/CC personnel answer 7:30a.m.-6:00p.m. EST,
- on call for emergencies during other hours.
-
- Past advisories and other computer security related information are available
- for anonymous ftp from the cert.sei.cmu.edu (192.88.209.5) system.
-
-