Buffer overflow in Xprt

[lupus () LETTERE UNIPD IT (Paolo Molaro)]

There is a buffer overflow in the postscript backend of the
Xprint server: look at the S_OutStr() function in the file psout.c.
A user-supplied variable-lenght string is stored in a 512 sized buffer.
This bug is present in version R6, public-patch-3 and later.

WORKAROUND: do not run the Xprt server.
FIX: make the function malloc() a buffer big enough and recompile.

xfree86 and opengroup have been notified a while ago.

lupus

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"The number of UNIX installations has grown to 10, with more expected."
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