#VU60947 Input validation error in IBM AIX and IBM VIOS - CVE-2021-38996

Vulnerability identifier: #VU60947

Vulnerability risk: Low

CVSSv4.0: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-38996

CWE-ID: CWE-20

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
IBM AIX
Operating systems & Components / Operating system
IBM VIOS
Server applications / Application servers

Vendor: IBM Corporation

Description

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

The vulnerability exists due to insufficient validation of user-supplied input in the AIX kernel. A local attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

IBM AIX: 7.1 - 7.3

IBM VIOS: 3.1.0

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External links
https://www.ibm.com/support/pages/node/6560390
https://aix.software.ibm.com/aix/efixes/security/caa_advisory2.asc

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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.