|
 |
773c19 |
From 0b95e025ee195fd549a77916c14af38e9b25ac16 Mon Sep 17 00:00:00 2001
|
|
|
773c19 |
From: Ryan Sullivan <rysulliv@redhat.com>
|
|
|
773c19 |
Date: Tue, 16 Apr 2024 13:57:40 -0400
|
|
|
773c19 |
Subject: [KPATCH CVE-2024-1086] kpatch fixes for CVE-2024-1086
|
|
|
773c19 |
|
|
|
773c19 |
Kernels:
|
|
|
773c19 |
3.10.0-1160.102.1.el7
|
|
|
773c19 |
3.10.0-1160.105.1.el7
|
|
|
773c19 |
3.10.0-1160.108.1.el7
|
|
|
773c19 |
|
|
|
773c19 |
|
|
|
773c19 |
Kpatch-MR: https://gitlab.com/redhat/prdsc/rhel/src/kpatch/rhel-7/-/merge_requests/70
|
|
|
773c19 |
Approved-by: Joe Lawrence (@joe.lawrence)
|
|
|
773c19 |
Changes since last build:
|
|
|
773c19 |
[x86_64]:
|
|
|
773c19 |
nf_tables_api.o: changed function: nft_data_init
|
|
|
773c19 |
|
|
|
773c19 |
[ppc64le]:
|
|
|
773c19 |
nf_tables_api.o: changed function: nft_data_init
|
|
|
773c19 |
nf_tables_api.o: changed function: nft_del_setelem
|
|
|
773c19 |
|
|
|
773c19 |
---------------------------
|
|
|
773c19 |
|
|
|
773c19 |
Modifications: none
|
|
|
773c19 |
|
|
|
773c19 |
commit 03d2627c7d53c06b8b28f5a57eb48ddbc1829c12
|
|
|
773c19 |
Author: Florian Westphal <fwestpha@redhat.com>
|
|
|
773c19 |
Date: Fri Feb 2 15:28:35 2024 +0100
|
|
|
773c19 |
|
|
|
773c19 |
netfilter: nf_tables: reject QUEUE/DROP verdict parameters
|
|
|
773c19 |
|
|
|
773c19 |
JIRA: https://issues.redhat.com/browse/RHEL-23500
|
|
|
773c19 |
Upstream Status: commit f342de4e2f33
|
|
|
773c19 |
CVE: CVE-2024-1086
|
|
|
773c19 |
|
|
|
773c19 |
commit f342de4e2f33e0e39165d8639387aa6c19dff660
|
|
|
773c19 |
Author: Florian Westphal <fw@strlen.de>
|
|
|
773c19 |
Date: Sat Jan 20 22:50:04 2024 +0100
|
|
|
773c19 |
|
|
|
773c19 |
netfilter: nf_tables: reject QUEUE/DROP verdict parameters
|
|
|
773c19 |
|
|
|
773c19 |
This reverts commit e0abdadcc6e1.
|
|
|
773c19 |
|
|
|
773c19 |
core.c:nf_hook_slow assumes that the upper 16 bits of NF_DROP
|
|
|
773c19 |
verdicts contain a valid errno, i.e. -EPERM, -EHOSTUNREACH or similar,
|
|
|
773c19 |
or 0.
|
|
|
773c19 |
|
|
|
773c19 |
Due to the reverted commit, its possible to provide a positive
|
|
|
773c19 |
value, e.g. NF_ACCEPT (1), which results in use-after-free.
|
|
|
773c19 |
|
|
|
773c19 |
Its not clear to me why this commit was made.
|
|
|
773c19 |
|
|
|
773c19 |
NF_QUEUE is not used by nftables; "queue" rules in nftables
|
|
|
773c19 |
will result in use of "nft_queue" expression.
|
|
|
773c19 |
|
|
|
773c19 |
If we later need to allow specifiying errno values from userspace
|
|
|
773c19 |
(do not know why), this has to call NF_DROP_GETERR and check that
|
|
|
773c19 |
"err <= 0" holds true.
|
|
|
773c19 |
|
|
|
773c19 |
Fixes: e0abdadcc6e1 ("netfilter: nf_tables: accept QUEUE/DROP verdict parameters")
|
|
|
773c19 |
Cc: stable@vger.kernel.org
|
|
|
773c19 |
Reported-by: Notselwyn <notselwyn@pwning.tech>
|
|
|
773c19 |
Signed-off-by: Florian Westphal <fw@strlen.de>
|
|
|
773c19 |
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
|
|
|
773c19 |
|
|
|
773c19 |
Signed-off-by: Florian Westphal <fwestpha@redhat.com>
|
|
|
773c19 |
|
|
|
773c19 |
Signed-off-by: Ryan Sullivan <rysulliv@redhat.com>
|
|
|
773c19 |
---
|
|
|
773c19 |
net/netfilter/nf_tables_api.c | 16 ++++++----------
|
|
|
773c19 |
1 file changed, 6 insertions(+), 10 deletions(-)
|
|
|
773c19 |
|
|
|
773c19 |
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
|
|
|
773c19 |
index ed8a787ac400..940f947b5fe7 100644
|
|
|
773c19 |
--- a/net/netfilter/nf_tables_api.c
|
|
|
773c19 |
+++ b/net/netfilter/nf_tables_api.c
|
|
|
773c19 |
@@ -4629,16 +4629,10 @@ static int nft_verdict_init(const struct nft_ctx *ctx, struct nft_data *data,
|
|
|
773c19 |
data->verdict.code = ntohl(nla_get_be32(tb[NFTA_VERDICT_CODE]));
|
|
|
773c19 |
|
|
|
773c19 |
switch (data->verdict.code) {
|
|
|
773c19 |
- default:
|
|
|
773c19 |
- switch (data->verdict.code & NF_VERDICT_MASK) {
|
|
|
773c19 |
- case NF_ACCEPT:
|
|
|
773c19 |
- case NF_DROP:
|
|
|
773c19 |
- case NF_QUEUE:
|
|
|
773c19 |
- break;
|
|
|
773c19 |
- default:
|
|
|
773c19 |
- return -EINVAL;
|
|
|
773c19 |
- }
|
|
|
773c19 |
- /* fall through */
|
|
|
773c19 |
+ case NF_ACCEPT:
|
|
|
773c19 |
+ case NF_DROP:
|
|
|
773c19 |
+ case NF_QUEUE:
|
|
|
773c19 |
+ break;
|
|
|
773c19 |
case NFT_CONTINUE:
|
|
|
773c19 |
case NFT_BREAK:
|
|
|
773c19 |
case NFT_RETURN:
|
|
|
773c19 |
@@ -4657,6 +4651,8 @@ static int nft_verdict_init(const struct nft_ctx *ctx, struct nft_data *data,
|
|
|
773c19 |
chain->use++;
|
|
|
773c19 |
data->verdict.chain = chain;
|
|
|
773c19 |
break;
|
|
|
773c19 |
+ default:
|
|
|
773c19 |
+ return -EINVAL;
|
|
|
773c19 |
}
|
|
|
773c19 |
|
|
|
773c19 |
desc->len = sizeof(data->verdict);
|
|
|
773c19 |
--
|
|
|
773c19 |
2.45.1
|
|
|
773c19 |
|
|
|
773c19 |
|