Out-of-bounds read in Linux kernel ksmbd

1) Out-of-bounds read

EUVDB-ID: #VU91105

Risk: Low

CVSSv3.1: 6.8 [AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-52441

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code.

The vulnerability exists due to an out-of-bounds read error within the init_smb1_server() function in fs/ksmbd/smb_common.c, within the handle_ksmbd_work() and queue_ksmbd_work() functions in fs/ksmbd/server.c. A local user can execute arbitrary code.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

External links

http://git.kernel.org/stable/c/5c0df9d30c289d6b9d7d44e2a450de2f8e3cf40b
http://git.kernel.org/stable/c/330d900620dfc9893011d725b3620cd2ee0bc2bc
http://git.kernel.org/stable/c/aa669ef229ae8dd779da9caa24e254964545895f
http://git.kernel.org/stable/c/536bb492d39bb6c080c92f31e8a55fe9934f452b

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.