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This repository contains the exploit for my recently discovered vulnerability in the nftables subsystem that was assigned CVE-2023-0179, affecting all Linux versions from 5.5 to 6.2-rc3, although the exploit was tested on 6.1.6.
The vulnerability details and writeup can be found on oss-security
Just invoke the
make leak and
make crash commands to generate the corresponding executables.
libnftnl are required for the build to succeed:
sudo apt-get install libmnl-dev libnftnl-dev
The exploit will enter an unprivileged user and network namespace and add an
nft_payload expression via the
rule_add_payload function which, when evaluated, will trigger the stack buffer overflow and overwrite the registers.
The content is then retrieved with the following nft command:
nft list map netdev mytable myset12
The output will leak several shuffled addresses relative to kernel data structures.
TODO: for now, the crash binary will just panic the kernel.