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mountd(8C)
Systems Affected: SunOS 4.1.1, 4.1.2, 4.1.3, and 4.1.3c. SunOS 4.1.3.u.1 is not vulnerable.
Problem: If an access list of hosts within /etc/exports is a string over 256 characters or the if the cached list of netgroups exceeds the cache capacity then the filesystem can be mounted by everyone. Unauthorized remote hosts will be able to mount the filesystem.
Solution: Sun has produced a patch for this vulnerability for sun3 and sun4 architectures. It is available through your local Sun Answer Center as well as through anonymous FTP from the ftp.uu.net system in the /systems/sun/sun-dist directory or from the ftp.eu.net system in the /sun/fixes directory. Obtain and install the appropriate patch following the instructions included with the patch.
Fix                     Patch ID       Filename            Checksum
/usr/etc/rpc.mountd     100296-01      100296-01.tar.Z     01501   233

Aleph One / aleph1@underground.org
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