Privilege escalation in Linux kernel nft support

1) Stack-based buffer overflow

EUVDB-ID: #VU87901

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-52628

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error within the nft_exthdr_sctp_eval(), nft_exthdr_tcp_eval(), and nft_exthdr_ipv6_eval() functions. A local user can pass specially crafted data to the system, trigger a stack-based buffer overflow and execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions

External links

http://git.kernel.org/stable/c/a7d86a77c33ba1c357a7504341172cc1507f0698
http://git.kernel.org/stable/c/1ad7b189cc1411048434e8595ffcbe7873b71082
http://git.kernel.org/stable/c/d9ebfc0f21377690837ebbd119e679243e0099cc
http://git.kernel.org/stable/c/c8f292322ff16b9a2272a67de396c09a50e09dce
http://git.kernel.org/stable/c/fd94d9dadee58e09b49075240fe83423eb1dcd36
http://www.zerodayinitiative.com/advisories/ZDI-24-297/
http://www.zerodayinitiative.com/advisories/ZDI-24-298/
http://www.zerodayinitiative.com/advisories/ZDI-24-299/

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.