ALASLIVEPATCH-2024-173

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nftables: exthdr: fix 4-byte stack OOB write

If priv->len is a multiple of 4, then dst[len / 4] can write past
the destination array which leads to stack corruption.

This construct is necessary to clean the remainder of the register
in case ->len is NOT a multiple of the register size, so make it
conditional just like nft_payload.c does.

The bug was added in 4.1 cycle and then copied/inherited when
tcp/sctp and ip option support was added.

Bug reported by Zero Day Initiative project (ZDI-CAN-21950,
ZDI-CAN-21951, ZDI-CAN-21961). (CVE-2023-52628)

src:
    kernel-livepatch-4.14.343-259.562-1.0-1.amzn2.src

x86_64:
    kernel-livepatch-4.14.343-259.562-1.0-1.amzn2.x86_64
    kernel-livepatch-4.14.343-259.562-debuginfo-1.0-1.amzn2.x86_64