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From 4dbabad13fa5c506138d15506f220006cde28d30 Mon Sep 17 00:00:00 2001
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From: Linqing Lu <lilu@redhat.com>
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Date: Thu, 4 Aug 2022 16:36:13 -0400
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Subject: [KPATCH CVE-2022-34918] kpatch fixes for CVE-2022-34918
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Kernels:
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5.14.0-70.13.1.el9_0
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5.14.0-70.17.1.el9_0
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Kpatch-MR: https://gitlab.com/redhat/prdsc/rhel/src/kpatch/rhel-9/-/merge_requests/4
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Approved-by: Joe Lawrence (@joe.lawrence)
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Changes since last build:
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arches: x86_64 ppc64le
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nf_tables_api.o: changed function: nft_add_set_elem
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---------------------------
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Modifications: none
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commit 6fd61750c2355e23d4cb1b1d9de297b884076a06
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Author: Florian Westphal <fwestpha@redhat.com>
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Date: Mon Jul 4 08:12:40 2022 +0200
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netfilter: nf_tables: stricter validation of element data
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Bugzilla: https://bugzilla.redhat.com/2104591
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CVE: CVE-2022-34918
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Y-Commit: 42087f51a09378ae5fa93d3bea82b4883f983e57
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O-Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2104592
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Upstream Status: commit 7e6bc1f6cabc
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O-CVE: CVE-2022-34918
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commit 7e6bc1f6cabcd30aba0b11219d8e01b952eacbb6
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Author: Pablo Neira Ayuso <pablo@netfilter.org>
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Date: Sat Jul 2 04:16:30 2022 +0200
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netfilter: nf_tables: stricter validation of element data
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Make sure element data type and length do not mismatch the one specified
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by the set declaration.
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Fixes: 7d7402642eaf ("netfilter: nf_tables: variable sized set element keys / data")
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Reported-by: Hugues ANGUELKOV <hanguelkov@randorisec.fr>
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Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Florian Westphal <fwestpha@redhat.com>
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Signed-off-by: Herton R. Krzesinski <herton@redhat.com>
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Signed-off-by: Linqing Lu <lilu@redhat.com>
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---
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net/netfilter/nf_tables_api.c | 9 ++++++++-
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1 file changed, 8 insertions(+), 1 deletion(-)
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diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
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index d495e10044dc..741a4e937e6f 100644
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--- a/net/netfilter/nf_tables_api.c
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+++ b/net/netfilter/nf_tables_api.c
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@@ -5094,13 +5094,20 @@ static int nft_setelem_parse_data(struct nft_ctx *ctx, struct nft_set *set,
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struct nft_data *data,
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struct nlattr *attr)
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{
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+ u32 dtype;
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int err;
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err = nft_data_init(ctx, data, NFT_DATA_VALUE_MAXLEN, desc, attr);
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if (err < 0)
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return err;
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- if (desc->type != NFT_DATA_VERDICT && desc->len != set->dlen) {
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+ if (set->dtype == NFT_DATA_VERDICT)
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+ dtype = NFT_DATA_VERDICT;
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+ else
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+ dtype = NFT_DATA_VALUE;
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+
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+ if (dtype != desc->type ||
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+ set->dlen != desc->len) {
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nft_data_release(data, desc->type);
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return -EINVAL;
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}
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--
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2.37.2
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