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Infinite loop in "cvs server"

From: Pavel Roskin
Subject: Infinite loop in "cvs server"
Date: Thu, 3 Oct 2002 17:04:28 -0400 (EDT)


This bug is observed with the CVS version of CVS on Red Hat Linux 8.0 

I run "cvs server" from the command line (I tried Linux console and rxvt - 
same result), then I press Ctrl-C and Ctrl-D.

This message is printed continuously:

cvs: buffer.c:1384: stdio_buffer_shutdown: Assertion `fstat ( fileno 
(bc->fp), &s ) != -1' failed.

I can only kill cvs by the "KILL" signal.

I cannot reproduce this bug over ssh (OpenSSH_3.4p1) - cvs terminates on
Ctrl-C.  However, I cannot exclude the possibility that this bug can be
exploited to execute random commands on a server that only allows the user
to execute "cvs server".

Pavel Roskin

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