module

Netfilter nft_set_elem_init Heap Overflow Privilege Escalation

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Disclosed
Feb 7, 2022
Created
Sep 28, 2022

Description

An issue was discovered in the Linux kernel through 5.18.9.
A type confusion bug in nft_set_elem_init (leading to a buffer overflow)
could be used by a local attacker to escalate privileges.
The attacker can obtain root access, but must start with an unprivileged
user namespace to obtain CAP_NET_ADMIN access.
The issue exists in nft_setelem_parse_data in net/netfilter/nf_tables_api.c.

Authors

Arthur Mongodin amongodin
Redouane NIBOUCHA rniboucha@yahoo.fr

Platform

Linux

Architectures

x64

References

Module Options

To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':


    msf > use exploit/linux/local/netfilter_nft_set_elem_init_privesc
    msf exploit(netfilter_nft_set_elem_init_privesc) > show targets
        ...targets...
    msf exploit(netfilter_nft_set_elem_init_privesc) > set TARGET < target-id >
    msf exploit(netfilter_nft_set_elem_init_privesc) > show options
        ...show and set options...
    msf exploit(netfilter_nft_set_elem_init_privesc) > exploit
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