Amazon Linux AMI update for microcode_ctl



Published: 2020-07-17
Risk Low
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2020-0543
CVE-2020-0548
CVE-2020-0549
CWE-ID CWE-200
Exploitation vector Local
Public exploit N/A
Vulnerable software
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Amazon Linux AMI
Operating systems & Components / Operating system

Vendor Amazon Web Services

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Information disclosure

EUVDB-ID: #VU28928

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-0543

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 incomplete cleanup from specific special register read operations in some Intel(R) Processors. A local user can gain unauthorized access to sensitive information on the system.

Mitigation

Update the affected packages:

i686:
    microcode_ctl-2.1-47.39.amzn1.i686
    microcode_ctl-debuginfo-2.1-47.39.amzn1.i686

src:
    microcode_ctl-2.1-47.39.amzn1.src

x86_64:
    microcode_ctl-debuginfo-2.1-47.39.amzn1.x86_64
    microcode_ctl-2.1-47.39.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2020-1396.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: #VU24688

Risk: Low

CVSSv3.1: 2.2 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-0548

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 cleanup errors. A local user can gain unauthorized access to sensitive information on the system.

Mitigation

Update the affected packages:

i686:
    microcode_ctl-2.1-47.39.amzn1.i686
    microcode_ctl-debuginfo-2.1-47.39.amzn1.i686

src:
    microcode_ctl-2.1-47.39.amzn1.src

x86_64:
    microcode_ctl-debuginfo-2.1-47.39.amzn1.x86_64
    microcode_ctl-2.1-47.39.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2020-1396.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.

3) Information disclosure

EUVDB-ID: #VU24689

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-0549

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 cleanup errors in some data cache evictions. A local user can gain unauthorized access to sensitive information on the system.

Mitigation

Update the affected packages:

i686:
    microcode_ctl-2.1-47.39.amzn1.i686
    microcode_ctl-debuginfo-2.1-47.39.amzn1.i686

src:
    microcode_ctl-2.1-47.39.amzn1.src

x86_64:
    microcode_ctl-debuginfo-2.1-47.39.amzn1.x86_64
    microcode_ctl-2.1-47.39.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2020-1396.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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