Privilege escalation in IBM Integrated Analytics System

1) Out-of-bounds write

EUVDB-ID: #VU57101

Risk: Medium

CVSSv3.1: 7 [CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-37576

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error in arch/powerpc/kvm/book3s_rtas.c in the Linux kernel through 5.13.5 on the powerpc platform. An attacker on KVM guest OS can cause host OS memory corruption via rtas_args.nargs and execute arbitrary code on the host OS.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM Integrated Analytics System: 1.0.0 - 1.0.27.0

External links

http://www.ibm.com/blogs/psirt/security-bulletin-vulnerability-in-linux-kernel-affects-ibm-integrated-analytics-system/
http://www.ibm.com/support/pages/node/6557218

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.