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SUN MICROSYSTEMS SECURITY BULLETIN: #00107

SUN MICROSYSTEMS SECURITY BULLETIN: #00107
Posted Jan 19, 1994

Patch advisory for Sun Microsystems. Please read for details.

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SUN MICROSYSTEMS SECURITY BULLETIN: #00107

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SUN MICROSYSTEMS SECURITY BULLETIN: #00107

This information is only to be used for the purpose of alerting
customers to problems. Any other use or re-broadcast of this
information without the express written consent of Sun Microsystems
shall be prohibited.

Sun expressly disclaims all liability for any misuse of this information
by any third party.
---------------------------------------------------------------------------


Sun Bug ID : 1059621
Synopsis : security hole created by installing sunsrc
Sun Patch ID: Not applicable see fix below.

This applies to sites that have installed Sun Source tapes only.

The Sun distribution of sources (sunsrc) has an installation
procedure which creates the directory /usr/release/bin and
installs two setuid root files in it: makeinstall and winstall.
These are both binary files which exec other programs: "make -k install"
(makeinstall) or "install" (winstall).

This makes it possible for users on that system to become root.

The solution:
chmod ug-s /usr/release/bin/{makeinstall, winstall}
(if the sources have already been installed)
and/or
edit the makefile in sunsrc/release and change the SETUID definition
(if the sources have been extracted from tape but not installed yet)

---------------------------------------------------------------------------
Special thanks to CERT and Tel-Aviv University for reporting this
problem.

Brad Powell
Sun Microsystems
Software Security Coordinator.
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