Improper privilege management in Linux kernel bpf

1) Improper privilege management

EUVDB-ID: #VU93739

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-46908

CWE-ID: CWE-269 - Improper Privilege Management

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improperly imposed permissions within the adjust_ptr_min_max_vals() function in kernel/bpf/verifier.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

External links

http://git.kernel.org/stable/c/4f3ff11204eac0ee23acf64deecb3bad7b0db0c6
http://git.kernel.org/stable/c/4ccdc6c6cae38b91c871293fb0ed8c6845a61b51
http://git.kernel.org/stable/c/9601148392520e2e134936e76788fc2a6371e7be

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.