Amazon Linux AMI update for microcode_ctl



Risk Low
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2022-21151
CVE-2022-21166
CWE-ID CWE-200
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Amazon Linux AMI
Operating systems & Components / Operating system

Vendor Amazon Web Services

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Information disclosure

EUVDB-ID: #VU63348

Risk: Low

CVSSv3.1: 5.2 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-21151

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

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

The vulnerability exists due to an error during processor optimization removal or modification of security-critical code. A local privileged user can gain access to potentially sensitive information.

Mitigation

Update the affected packages:

i686:
    microcode_ctl-2.1-47.40.amzn1.i686
    microcode_ctl-debuginfo-2.1-47.40.amzn1.i686

src:
    microcode_ctl-2.1-47.40.amzn1.src

x86_64:
    microcode_ctl-2.1-47.40.amzn1.x86_64
    microcode_ctl-debuginfo-2.1-47.40.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3 External links

http://alas.aws.amazon.com/ALAS-2022-1606.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.

2) Information disclosure

EUVDB-ID: #VU64366

Risk: Low

CVSSv3.1: 5.2 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-21166

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows an attacker to gain access to potentially sensitive information.

The vulnerability exists in Intel processors due to excessive data output when DirectPath I/O (PCI-Passthrough) is utilized. An attacker (both local and remote) with administrative access to a virtual machine that has an attached DirectPath I/O (PCI-Passthrough) device can obtain information stored in physical memory about the hypervisor or other virtual machines that reside on the same host.

Mitigation

Update the affected packages:

i686:
    microcode_ctl-2.1-47.40.amzn1.i686
    microcode_ctl-debuginfo-2.1-47.40.amzn1.i686

src:
    microcode_ctl-2.1-47.40.amzn1.src

x86_64:
    microcode_ctl-2.1-47.40.amzn1.x86_64
    microcode_ctl-debuginfo-2.1-47.40.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3 External links

http://alas.aws.amazon.com/ALAS-2022-1606.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.



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