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OBS-URL: https://build.opensuse.org/package/show/security:netfilter/iptables?expand=0&rev=167
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OBS User unknown 2024-12-02 17:28:47 +00:00 committed by Git OBS Bridge
parent b093c798f8
commit c1daea13da
5 changed files with 182 additions and 3 deletions
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4
_scmsync.obsinfo
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@ -1,4 +1,4 @@
mtime: 1731534167
commit: 82708d933dfdb787451fc901cafcc706ae5e86d56b2a0a24a96e9933a5c3036b
mtime: 1733147015
commit: 5f074bda5a10d96b965b4e60bd0f56762bb227d30bbb1c4b617012e3d6319e18
url: https://src.opensuse.org/jengelh/iptables
revision: master

2
build.specials.obscpio
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@ -1,3 +1,3 @@
version https://git-lfs.github.com/spec/v1
oid sha256:31ba60425f10ce021c82a9751174949af9dd1adaf8e67c0700697bb446c05c37
oid sha256:0ce3e2d396879c4d7b973da79452b49fce1fd2544f9d7201785d25a63b893cd8
size 256

172
iptables-nft-fix-interface-comparisons.patch Normal file
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@ -0,0 +1,172 @@
From 40406dbfaefbc204134452b2747bae4f6a122848 Mon Sep 17 00:00:00 2001
From: Jeremy Sowden <jeremy@azazel.net>
Date: Mon, 18 Nov 2024 13:56:50 +0000
Subject: nft: fix interface comparisons in `-C` commands
Commit 9ccae6397475 ("nft: Leave interface masks alone when parsing from
kernel") removed code which explicitly set interface masks to all ones. The
result of this is that they are zero. However, they are used to mask interfaces
in `is_same_interfaces`. Consequently, the masked values are alway zero, the
comparisons are always true, and check commands which ought to fail succeed:
# iptables -N test
# iptables -A test -i lo \! -o lo -j REJECT
# iptables -v -L test
Chain test (0 references)
pkts bytes target prot opt in out source destination
0 0 REJECT all -- lo !lo anywhere anywhere reject-with icmp-port-unreachable
# iptables -v -C test -i abcdefgh \! -o abcdefgh -j REJECT
REJECT all opt -- in lo out !lo 0.0.0.0/0 -> 0.0.0.0/0 reject-with icmp-port-unreachable
Remove the mask parameters from `is_same_interfaces`. Add a test-case.
Fixes: 9ccae6397475 ("nft: Leave interface masks alone when parsing from kernel")
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Phil Sutter <phil@nwl.cc>
---
iptables/nft-arp.c | 10 ++----
iptables/nft-ipv4.c | 4 +--
iptables/nft-ipv6.c | 6 +---
iptables/nft-shared.c | 36 +++++-----------------
iptables/nft-shared.h | 6 +---
.../testcases/nft-only/0020-compare-interfaces_0 | 9 ++++++
6 files changed, 22 insertions(+), 49 deletions(-)
create mode 100755 iptables/tests/shell/testcases/nft-only/0020-compare-interfaces_0
diff --git a/iptables/nft-arp.c b/iptables/nft-arp.c
index 264864c3..c11d64c3 100644
--- a/iptables/nft-arp.c
+++ b/iptables/nft-arp.c
@@ -385,14 +385,8 @@ static bool nft_arp_is_same(const struct iptables_command_state *cs_a,
return false;
}
- return is_same_interfaces(a->arp.iniface,
- a->arp.outiface,
- (unsigned char *)a->arp.iniface_mask,
- (unsigned char *)a->arp.outiface_mask,
- b->arp.iniface,
- b->arp.outiface,
- (unsigned char *)b->arp.iniface_mask,
- (unsigned char *)b->arp.outiface_mask);
+ return is_same_interfaces(a->arp.iniface, a->arp.outiface,
+ b->arp.iniface, b->arp.outiface);
}
static void nft_arp_save_chain(const struct nftnl_chain *c, const char *policy)
diff --git a/iptables/nft-ipv4.c b/iptables/nft-ipv4.c
index 74092875..0c8bd291 100644
--- a/iptables/nft-ipv4.c
+++ b/iptables/nft-ipv4.c
@@ -113,9 +113,7 @@ static bool nft_ipv4_is_same(const struct iptables_command_state *a,
}
return is_same_interfaces(a->fw.ip.iniface, a->fw.ip.outiface,
- a->fw.ip.iniface_mask, a->fw.ip.outiface_mask,
- b->fw.ip.iniface, b->fw.ip.outiface,
- b->fw.ip.iniface_mask, b->fw.ip.outiface_mask);
+ b->fw.ip.iniface, b->fw.ip.outiface);
}
static void nft_ipv4_set_goto_flag(struct iptables_command_state *cs)
diff --git a/iptables/nft-ipv6.c b/iptables/nft-ipv6.c
index b184f8af..4dbb2af2 100644
--- a/iptables/nft-ipv6.c
+++ b/iptables/nft-ipv6.c
@@ -99,11 +99,7 @@ static bool nft_ipv6_is_same(const struct iptables_command_state *a,
}
return is_same_interfaces(a->fw6.ipv6.iniface, a->fw6.ipv6.outiface,
- a->fw6.ipv6.iniface_mask,
- a->fw6.ipv6.outiface_mask,
- b->fw6.ipv6.iniface, b->fw6.ipv6.outiface,
- b->fw6.ipv6.iniface_mask,
- b->fw6.ipv6.outiface_mask);
+ b->fw6.ipv6.iniface, b->fw6.ipv6.outiface);
}
static void nft_ipv6_set_goto_flag(struct iptables_command_state *cs)
diff --git a/iptables/nft-shared.c b/iptables/nft-shared.c
index 6775578b..2c29e68f 100644
--- a/iptables/nft-shared.c
+++ b/iptables/nft-shared.c
@@ -220,36 +220,16 @@ void add_l4proto(struct nft_handle *h, struct nftnl_rule *r,
}
bool is_same_interfaces(const char *a_iniface, const char *a_outiface,
- unsigned const char *a_iniface_mask,
- unsigned const char *a_outiface_mask,
- const char *b_iniface, const char *b_outiface,
- unsigned const char *b_iniface_mask,
- unsigned const char *b_outiface_mask)
+ const char *b_iniface, const char *b_outiface)
{
- int i;
-
- for (i = 0; i < IFNAMSIZ; i++) {
- if (a_iniface_mask[i] != b_iniface_mask[i]) {
- DEBUGP("different iniface mask %x, %x (%d)\n",
- a_iniface_mask[i] & 0xff, b_iniface_mask[i] & 0xff, i);
- return false;
- }
- if ((a_iniface[i] & a_iniface_mask[i])
- != (b_iniface[i] & b_iniface_mask[i])) {
- DEBUGP("different iniface\n");
- return false;
- }
- if (a_outiface_mask[i] != b_outiface_mask[i]) {
- DEBUGP("different outiface mask\n");
- return false;
- }
- if ((a_outiface[i] & a_outiface_mask[i])
- != (b_outiface[i] & b_outiface_mask[i])) {
- DEBUGP("different outiface\n");
- return false;
- }
+ if (strncmp(a_iniface, b_iniface, IFNAMSIZ)) {
+ DEBUGP("different iniface\n");
+ return false;
+ }
+ if (strncmp(a_outiface, b_outiface, IFNAMSIZ)) {
+ DEBUGP("different outiface\n");
+ return false;
}
-
return true;
}
diff --git a/iptables/nft-shared.h b/iptables/nft-shared.h
index 51d1e460..b57aee1f 100644
--- a/iptables/nft-shared.h
+++ b/iptables/nft-shared.h
@@ -105,11 +105,7 @@ void add_l4proto(struct nft_handle *h, struct nftnl_rule *r, uint8_t proto, uint
void add_compat(struct nftnl_rule *r, uint32_t proto, bool inv);
bool is_same_interfaces(const char *a_iniface, const char *a_outiface,
- unsigned const char *a_iniface_mask,
- unsigned const char *a_outiface_mask,
- const char *b_iniface, const char *b_outiface,
- unsigned const char *b_iniface_mask,
- unsigned const char *b_outiface_mask);
+ const char *b_iniface, const char *b_outiface);
void __get_cmp_data(struct nftnl_expr *e, void *data, size_t dlen, uint8_t *op);
void get_cmp_data(struct nftnl_expr *e, void *data, size_t dlen, bool *inv);
diff --git a/iptables/tests/shell/testcases/nft-only/0020-compare-interfaces_0 b/iptables/tests/shell/testcases/nft-only/0020-compare-interfaces_0
new file mode 100755
index 00000000..278cd648
--- /dev/null
+++ b/iptables/tests/shell/testcases/nft-only/0020-compare-interfaces_0
@@ -0,0 +1,9 @@
+#!/bin/bash
+
+[[ $XT_MULTI == *xtables-nft-multi ]] || { echo "skip $XT_MULTI"; exit 0; }
+
+$XT_MULTI iptables -N test
+$XT_MULTI iptables -A test -i lo \! -o lo -j REJECT
+$XT_MULTI iptables -C test -i abcdefgh \! -o abcdefgh -j REJECT 2>/dev/null && exit 1
+
+exit 0
--
cgit v1.2.3

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iptables.changes
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-------------------------------------------------------------------
Mon Dec 2 13:40:26 UTC 2024 - Antonio Teixeira <antonio.teixeira@suse.com>
- Add iptables-nft-fix-interface-comparisons.patch
* fix '-C' commands for nft backend (bsc#1233690)
-------------------------------------------------------------------
Fri Nov 8 16:14:22 UTC 2024 - Jan Engelhardt <jengelh@inai.de>

1
iptables.spec
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@ -37,6 +37,7 @@ Source4: baselibs.conf
Patch1: iptables-batch.patch
Patch2: iptables-batch-lock.patch
Patch3: iptables-1.8.2-dont_read_garbage.patch
Patch4: iptables-nft-fix-interface-comparisons.patch
BuildRequires: bison
BuildRequires: fdupes