Buffer overflow in Linux kernel net ethernet driver

1) Buffer overflow

EUVDB-ID: #VU91206

Risk: Low

CVSSv3.1: 7.7 [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-2021-47137

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to memory corruption within the xrx200_close(), xrx200_alloc_skb() and xrx200_hw_receive() functions in drivers/net/ethernet/lantiq_xrx200.c. A local user can escalate privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

External links

http://git.kernel.org/stable/c/8bb1077448d43a871ed667520763e3b9f9b7975d
http://git.kernel.org/stable/c/5ac72351655f8b033a2935646f53b7465c903418
http://git.kernel.org/stable/c/46dd4abced3cb2c912916f4a5353e0927db0c4a2
http://git.kernel.org/stable/c/c7718ee96dbc2f9c5fc3b578abdf296dd44b9c20

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.