#VU94923 Type Confusion in Linux kernel - CVE-2024-42070

Vulnerability identifier: #VU94923

Vulnerability risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-42070

CWE-ID: CWE-843

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to a type confusion error within the nft_lookup_init() function in net/netfilter/nft_lookup.c, within the nf_tables_fill_setelem() and nft_validate_register_store() functions in net/netfilter/nf_tables_api.c. A local user can pass specially crafted data to the packet filtering to trigger a type confusion error and gain access to sensitive information.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/40188a25a9847dbeb7ec67517174a835a677752f
https://git.kernel.org/stable/c/23752737c6a618e994f9a310ec2568881a6b49c4
https://git.kernel.org/stable/c/5d43d789b57943720dca4181a05f6477362b94cf
https://git.kernel.org/stable/c/461302e07f49687ffe7d105fa0a330c07c7646d8
https://git.kernel.org/stable/c/efb27ad05949403848f487823b597ed67060e007
https://git.kernel.org/stable/c/952bf8df222599baadbd4f838a49c4fef81d2564
https://git.kernel.org/stable/c/41a6375d48deaf7f730304b5153848bfa1c2980f
https://git.kernel.org/stable/c/7931d32955e09d0a11b1fe0b6aac1bfa061c005c
https://www.zerodayinitiative.com/advisories/ZDI-24-1642/

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.