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Commit faafd928 authored by Thadeu Lima de Souza Cascardo's avatar Thadeu Lima de Souza Cascardo Committed by Greg Kroah-Hartman
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netfilter: nf_tables: do not allow SET_ID to refer to another table



commit 470ee20e upstream.

When doing lookups for sets on the same batch by using its ID, a set from a
different table can be used.

Then, when the table is removed, a reference to the set may be kept after
the set is freed, leading to a potential use-after-free.

When looking for sets by ID, use the table that was used for the lookup by
name, and only return sets belonging to that same table.

This fixes CVE-2022-2586, also reported as ZDI-CAN-17470.

Reported-by: default avatarTeam Orca of Sea Security <(@seasecresponse)>
Fixes: 958bee14 ("netfilter: nf_tables: use new transaction infrastructure to handle sets")
Signed-off-by: default avatarThadeu Lima de Souza Cascardo <cascardo@canonical.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 5ea18ddc
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