Information disclosure in EFS implementation in IBM VIOS

1) Information disclosure

EUVDB-ID: #VU58200

Risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-29861

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output within the EFS implementation. A local user can gain unauthorized access to sensitive information on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM VIOS: 3.1.0 - 3.1.2

CPE2.3

• cpe:2.3:a:ibm_corporation:ibm_vios:3.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:ibm_corporation:ibm_vios:3.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:ibm_corporation:ibm_vios:3.1.2:*:*:*:*:*:*:*

External links

https://aix.software.ibm.com/aix/efixes/security/efs_advisory.asc

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.