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From: Karsten Desler <kdesler@soohrt.org>
To: Martin Josefsson <gandalf@wlug.westbo.se>
Cc: netfilter-devel@lists.netfilter.org
Subject: Re: minor bug in iptables 1.2.9
Date: Sat, 31 Jan 2004 14:56:09 +0100	[thread overview]
Message-ID: <20040131135609.GA11570@soohrt.org> (raw)
In-Reply-To: <1075555394.22658.0.camel@tux.rsn.bth.se>

[-- Attachment #1: Type: text/plain, Size: 262 bytes --]

Hi,

today I had a little more time to look at the code. A few lines
down, there's another incarnation of the same bug.
line 641:

	char buf[256];
	...
	strncpy(buf, name, sizeof(buf) - 1);
	if ((p = strrchr(buf, '/')) != NULL) {
	...

Patch attached.
  Karsten

[-- Attachment #2: iptables-1.2.9-overflow2.patch --]
[-- Type: text/plain, Size: 298 bytes --]

--- iptables~.c	2004-01-31 14:42:29.000000000 +0100
+++ iptables.c	2004-01-31 14:53:57.000000000 +0100
@@ -639,6 +640,7 @@
 	int i, j, k, n;
 
 	strncpy(buf, name, sizeof(buf) - 1);
+	buf[sizeof(buf) - 1] = '\0';
 	if ((p = strrchr(buf, '/')) != NULL) {
 		*p = '\0';
 		addrp = parse_mask(p + 1);

  reply	other threads:[~2004-01-31 13:56 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-01-30  8:48 minor bug in iptables 1.2.9 Karsten Desler
2004-01-31 13:23 ` Martin Josefsson
2004-01-31 13:56   ` Karsten Desler [this message]
2004-01-31 15:20     ` Martin Josefsson
     [not found]   ` <20040131142932.GB11570@soohrt.org>
2004-01-31 15:35     ` Martin Josefsson

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