Amazon Linux AMI update for microcode_ctl

1) Sequence of processor instructions leads to unexpected behavior

EUVDB-ID: #VU82351

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-23583

CWE-ID: CWE-1281 - Sequence of Processor Instructions Leads to Unexpected Behavior

Exploit availability: No

Description

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

The vulnerability exists due to an error related to processing of Sequence of processor instructions. A local user can execute arbitrary code with elevated privileges.

Mitigation

Update the affected packages:

i686:
    microcode_ctl-debuginfo-2.1-47.42.amzn1.i686
    microcode_ctl-2.1-47.42.amzn1.i686

src:
    microcode_ctl-2.1-47.42.amzn1.src

x86_64:
    microcode_ctl-2.1-47.42.amzn1.x86_64
    microcode_ctl-debuginfo-2.1-47.42.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

microcode_ctl: before 2.1-47.42

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*
• cpe:2.3:a:amazon_web_services:microcode_ctl:*:*:*:*:*:amazon_linux_ami:*:*

External links

https://alas.aws.amazon.com/ALAS-2023-1890.html

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.