High · published March 28, 2024
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).
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | ≥ 4.1, < 5.10.198 | 5.10.198 |
| linux/linux_kernel | ≥ 5.11, < 5.15.132 | 5.15.132 |
| linux/linux_kernel | ≥ 5.16, < 6.1.54 | 6.1.54 |
| linux/linux_kernel | ≥ 6.2, < 6.5.4 | 6.5.4 |