ACK: [SRU Jammy, Kinetic, Lunar, Mantic, OEM-5.17, OEM-6.0, OEM-6.1 0/1] CVE-2023-31248

[Tim Gardner]

On 7/6/23 3:49 AM, Thadeu Lima de Souza Cascardo wrote:
> [Impact]
> An unprivileged user can trigger a use-after-free on a chain when adding a
> rule by using CHAIN_ID. An attacker could use this to cause denial of
> service (crash) or achieve code execution.
> 
> [Backport]
> The fix was applied in the netfilter/nf.git tree and a tag has been pushed.
> It is likely to get merged with the same SHA1. The provenance has been added,
> but no SAUCE.
> 
> [Test case]
> A reproducer has been tested.
> 
> [Potential regression]
> nftables users may regress.
> 
> Thadeu Lima de Souza Cascardo (1):
>    netfilter: nf_tables: do not ignore genmask when looking up chain by
>      id
> 
>   net/netfilter/nf_tables_api.c | 11 +++++++----
>   1 file changed, 7 insertions(+), 4 deletions(-)
> 
Acked-by: Tim Gardner <tim.gardner at canonical.com>
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Tim Gardner
Canonical, Inc