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amazonAmazonALAS2-2020-1510
HistoryOct 22, 2020 - 5:30 p.m.

Medium: edk2

2020-10-2217:30:00
alas.aws.amazon.com
9

8 High

CVSS3

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

6.6 Medium

AI Score

Confidence

High

5.2 Medium

CVSS2

Access Vector

ADJACENT_NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:A/AC:L/Au:S/C:P/I:P/A:P

0.001 Low

EPSS

Percentile

41.6%

Issue Overview:

Insufficient control flow management in BIOS firmware for 8th, 9th, 10th Generation Intel® Core™, Intel® Celeron® Processor 4000 & 5000 Series Processors may allow an authenticated user to potentially enable denial of service via adjacent access. (CVE-2019-14558)

Memory leak in ArpOnFrameRcvdDpc (CVE-2019-14559)

Numeric truncation in MdeModulePkg/PiDxeS3BootScriptLib (CVE-2019-14563)

DxeImageVerificationHandler() fails open in case of dbx signature check (CVE-2019-14575)

Potential use-after-free due to the original configuration runtime memory is freed but it is still exposed to the OS runtime (CVE-2019-14586)

Double-unmap issue in SdMmcCreateTrb function in MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.c (CVE-2019-14587)

Affected Packages:

edk2

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update edk2 to update your system.

New Packages:

aarch64:  
    edk2-tools-20200801stable-1.amzn2.0.1.aarch64  
    edk2-debuginfo-20200801stable-1.amzn2.0.1.aarch64  
  
noarch:  
    edk2-tools-python-20200801stable-1.amzn2.0.1.noarch  
    edk2-tools-doc-20200801stable-1.amzn2.0.1.noarch  
    edk2-aarch64-20200801stable-1.amzn2.0.1.noarch  
    edk2-ovmf-20200801stable-1.amzn2.0.1.noarch  
  
src:  
    edk2-20200801stable-1.amzn2.0.1.src  
  
x86_64:  
    edk2-tools-20200801stable-1.amzn2.0.1.x86_64  
    edk2-debuginfo-20200801stable-1.amzn2.0.1.x86_64  

Additional References

Red Hat: CVE-2019-14558, CVE-2019-14559, CVE-2019-14563, CVE-2019-14575, CVE-2019-14586, CVE-2019-14587

Mitre: CVE-2019-14558, CVE-2019-14559, CVE-2019-14563, CVE-2019-14575, CVE-2019-14586, CVE-2019-14587

8 High

CVSS3

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

6.6 Medium

AI Score

Confidence

High

5.2 Medium

CVSS2

Access Vector

ADJACENT_NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:A/AC:L/Au:S/C:P/I:P/A:P

0.001 Low

EPSS

Percentile

41.6%

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