Privilege escalation in Dell PowerEdge T30/T40

1) Time-of-check Time-of-use (TOCTOU) Race Condition

EUVDB-ID: #VU75609

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/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-2022-34398

CWE-ID: CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

Exploit availability: No

Description

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

The vulnerability exists due to a race condition. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system using a specifically timed DMA transaction during an SMI.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

PowerEdge T40: before 1.10.1

PowerEdge T30 Mini Tower Server: before 1.10.1

CPE2.3

• cpe:2.3:h:dell:t40:*:*:*:*:*:*:*:
• cpe:2.3:a:dell:poweredge_t30_mini_tower_server:*:*:*:*:*:*:*:

External links

http://www.dell.com/support/kbdoc/000206038

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.