bugtraq - Re: GNU/Linux 'info Buffer Overflow

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Message-ID: <200408070109.04162.roman@student.ifpan.edu.pl>
Date: Sat, 7 Aug 2004 01:09:04 +0200
From: Roman Werpachowski <roman@...dent.ifpan.edu.pl>
To: bugtraq@...urityfocus.com
Subject: Re: GNU/Linux 'info Buffer Overflow


Dnia piątek, 6 sierpnia 2004 02:46, Josh Martin napisał:
> Package: info
> Version: 4.7-2.1
> Severity: grave
> Tags: security
> Justification: user security hole

'Severe' is to severe a word, but for anybody who's interested, here goes a 
patch:

diff -urN texinfo-4.7/info/echo-area.c texinfo-4.7.patch/info/echo-area.c
--- texinfo-4.7/info/echo-area.c        2004-03-14 01:57:29.000000000 +0100
+++ texinfo-4.7.patch/info/echo-area.c  2004-08-07 01:06:49.000000000 +0200
@@ -1510,8 +1510,8 @@
   text[i] = 0;

   echo_area_initialize_node ();
-  sprintf (&input_line[input_line_end], "%s[%s]\n",
-           echo_area_is_active ? " ": "", text);
+  snprintf (&input_line[input_line_end], EA_MAX_INPUT + 1 - input_line_end,
+                 "%s[%s]\n", echo_area_is_active ? " ": "", text);
   free (text);
   the_echo_area->point = input_line_point;
   display_update_one_window (the_echo_area);



-- 
/* Roman Werpachowski */

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