1c8d6d0d32
- Rebase to version 1.8.5 plus upstream-indicated fixes - Fix for duplicate files in RPM due to imprecise globbing - Drop bootstrap code again Resolves: rhbz#2211063
136 lines
3.9 KiB
Diff
136 lines
3.9 KiB
Diff
From 84d19c668db246556fac766cff8652ea6f3a4076 Mon Sep 17 00:00:00 2001
|
|
From: Phil Sutter <phil@nwl.cc>
|
|
Date: Tue, 18 Jan 2022 22:39:08 +0100
|
|
Subject: [PATCH] xshared: Fix response to unprivileged users
|
|
|
|
Expected behaviour in both variants is:
|
|
|
|
* Print help without error, append extension help if -m and/or -j
|
|
options are present
|
|
* Indicate lack of permissions in an error message for anything else
|
|
|
|
With iptables-nft, this was broken basically from day 1. Shared use of
|
|
do_parse() then somewhat broke legacy: it started complaining about
|
|
inability to create a lock file.
|
|
|
|
Fix this by making iptables-nft assume extension revision 0 is present
|
|
if permissions don't allow to verify. This is consistent with legacy.
|
|
|
|
Second part is to exit directly after printing help - this avoids having
|
|
to make the following code "nop-aware" to prevent privileged actions.
|
|
|
|
Signed-off-by: Phil Sutter <phil@nwl.cc>
|
|
Reviewed-by: Florian Westphal <fw@strlen.de>
|
|
(cherry picked from commit 26ecdf53960658771c0fc582f72a4025e2887f75)
|
|
|
|
Conflicts:
|
|
iptables/xshared.c
|
|
-> Adjusted to missing commit 62c3c93d4b0f5
|
|
("xshared: Move do_parse to shared space").
|
|
---
|
|
iptables/nft.c | 5 ++
|
|
.../testcases/iptables/0008-unprivileged_0 | 60 +++++++++++++++++++
|
|
iptables/xtables.c | 3 +-
|
|
3 files changed, 66 insertions(+), 2 deletions(-)
|
|
create mode 100755 iptables/tests/shell/testcases/iptables/0008-unprivileged_0
|
|
|
|
diff --git a/iptables/nft.c b/iptables/nft.c
|
|
index ba59cfb8c47af..da9d24f5c86e2 100644
|
|
--- a/iptables/nft.c
|
|
+++ b/iptables/nft.c
|
|
@@ -3294,6 +3294,11 @@ int nft_compatible_revision(const char *name, uint8_t rev, int opt)
|
|
err:
|
|
mnl_socket_close(nl);
|
|
|
|
+ /* pretend revision 0 is valid if not permitted to check -
|
|
+ * this is required for printing extension help texts as user */
|
|
+ if (ret < 0 && errno == EPERM && rev == 0)
|
|
+ return 1;
|
|
+
|
|
return ret < 0 ? 0 : 1;
|
|
}
|
|
|
|
diff --git a/iptables/tests/shell/testcases/iptables/0008-unprivileged_0 b/iptables/tests/shell/testcases/iptables/0008-unprivileged_0
|
|
new file mode 100755
|
|
index 0000000000000..43e3bc8721dbd
|
|
--- /dev/null
|
|
+++ b/iptables/tests/shell/testcases/iptables/0008-unprivileged_0
|
|
@@ -0,0 +1,60 @@
|
|
+#!/bin/bash
|
|
+
|
|
+# iptables may print match/target specific help texts
|
|
+# help output should work for unprivileged users
|
|
+
|
|
+run() {
|
|
+ echo "running: $*" >&2
|
|
+ runuser -u nobody -- "$@"
|
|
+}
|
|
+
|
|
+grep_or_rc() {
|
|
+ declare -g rc
|
|
+ grep -q "$*" && return 0
|
|
+ echo "missing in output: $*" >&2
|
|
+ return 1
|
|
+}
|
|
+
|
|
+out=$(run $XT_MULTI iptables --help)
|
|
+let "rc+=$?"
|
|
+grep_or_rc "iptables -h (print this help information)" <<< "$out"
|
|
+let "rc+=$?"
|
|
+
|
|
+out=$(run $XT_MULTI iptables -m limit --help)
|
|
+let "rc+=$?"
|
|
+grep_or_rc "limit match options:" <<< "$out"
|
|
+let "rc+=$?"
|
|
+
|
|
+out=$(run $XT_MULTI iptables -p tcp --help)
|
|
+let "rc+=$?"
|
|
+grep_or_rc "tcp match options:" <<< "$out"
|
|
+let "rc+=$?"
|
|
+
|
|
+out=$(run $XT_MULTI iptables -j DNAT --help)
|
|
+let "rc+=$?"
|
|
+grep_or_rc "DNAT target options:" <<< "$out"
|
|
+let "rc+=$?"
|
|
+
|
|
+out=$(run $XT_MULTI iptables -p tcp -j DNAT --help)
|
|
+let "rc+=$?"
|
|
+grep_or_rc "tcp match options:" <<< "$out"
|
|
+let "rc+=$?"
|
|
+out=$(run $XT_MULTI iptables -p tcp -j DNAT --help)
|
|
+let "rc+=$?"
|
|
+grep_or_rc "DNAT target options:" <<< "$out"
|
|
+let "rc+=$?"
|
|
+
|
|
+
|
|
+run $XT_MULTI iptables -L 2>&1 | \
|
|
+ grep_or_rc "Permission denied"
|
|
+let "rc+=$?"
|
|
+
|
|
+run $XT_MULTI iptables -A FORWARD -p tcp --dport 123 2>&1 | \
|
|
+ grep_or_rc "Permission denied"
|
|
+let "rc+=$?"
|
|
+
|
|
+run $XT_MULTI iptables -A FORWARD -j DNAT --to-destination 1.2.3.4 2>&1 | \
|
|
+ grep_or_rc "Permission denied"
|
|
+let "rc+=$?"
|
|
+
|
|
+exit $rc
|
|
diff --git a/iptables/xtables.c b/iptables/xtables.c
|
|
index 54f887f80497e..7ef1702a0cd50 100644
|
|
--- a/iptables/xtables.c
|
|
+++ b/iptables/xtables.c
|
|
@@ -637,8 +637,7 @@ void do_parse(struct nft_handle *h, int argc, char *argv[],
|
|
XTF_TRY_LOAD, &cs->matches);
|
|
|
|
printhelp(cs->matches);
|
|
- p->command = CMD_NONE;
|
|
- return;
|
|
+ exit(0);
|
|
|
|
/*
|
|
* Option selection
|
|
--
|
|
2.40.0
|
|
|