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51 lines
1.6 KiB
51 lines
1.6 KiB
5 years ago
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From c360c1d2af887c8e614ec152fb64717e56fb472d Mon Sep 17 00:00:00 2001
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From: Phil Sutter <psutter@redhat.com>
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Date: Tue, 9 Apr 2019 15:22:44 +0200
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Subject: [PATCH] iptables-xml: fix segfault if missing space after -A
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1525980
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Upstream Status: iptables commit f53b78e423d82
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commit f53b78e423d82b0c71c076480f52edeb5eaec5f8
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Author: Phil Oester <kernel@linuxace.com>
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Date: Thu Jan 23 22:06:58 2014 -0800
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iptables-xml: fix segfault if missing space after -A
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As pointed out by Bernhard Reutner-Fischer, a malformed line fed to
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iptables-xml such as the below with a missing space after the -A:
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-APOSTROUTING -d 1.1.1.1/32 -p tcp -j MASQUERADE
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causes a segfault. Patch attached.
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This closes netfilter bugzilla #886.
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Signed-off-by: Phil Oester <kernel@linuxace.com>
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Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Phil Sutter <psutter@redhat.com>
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---
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iptables/iptables-xml.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/iptables/iptables-xml.c b/iptables/iptables-xml.c
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index 49f8ea2826181..769f76550b764 100644
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--- a/iptables/iptables-xml.c
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+++ b/iptables/iptables-xml.c
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@@ -777,6 +777,11 @@ iptables_xml_main(int argc, char *argv[])
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for (a = 0; a < newargc; a++)
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DEBUGP("argv[%u]: %s\n", a, newargv[a]);
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+ if (!chain) {
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+ fprintf(stderr, "%s: line %u failed - no chain found\n",
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+ prog_name, line);
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+ exit(1);
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+ }
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needChain(chain);// Should we explicitly look for -A
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do_rule(pcnt, bcnt, newargc, newargv, newargvattr);
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--
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2.21.0
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