[SECURITY] netfilter: nf_nat_proto_tcp: fix TCP UPDATE_SEQ handling (CVE-2016-9793)#134
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Mifacopy wants to merge 1 commit intofacebookincubator:oculus-go-kernel-masterfrom
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[SECURITY] netfilter: nf_nat_proto_tcp: fix TCP UPDATE_SEQ handling (CVE-2016-9793)#134Mifacopy wants to merge 1 commit intofacebookincubator:oculus-go-kernel-masterfrom
Mifacopy wants to merge 1 commit intofacebookincubator:oculus-go-kernel-masterfrom
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Fix CVE-2016-9793.
Upstream commit: 6ef36ab967c71690ebe7e5ef997a8be4da3bc844
The nf_nat_proto_tcp module in netfilter performed unsafe handling of
TCP UPDATE_SEQ options, allowing crafted packets crossing a NAT boundary to
cause integer overflows or incorrect state adjustments. This could result
in denial of service (kernel panic) or malformed session state.
This patch tightens boundary checks and sequence adjustments in the
TCP update path to prevent invalid UPDATE_SEQ operations.
Reference: CVE-2016-9793