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amazonAmazonALAS2-2019-1222
HistoryJun 13, 2019 - 10:11 p.m.

Critical: kernel

2019-06-1322:11:00
alas.aws.amazon.com
42

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

7.2 High

AI Score

Confidence

High

7.8 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:N/I:N/A:C

0.974 High

EPSS

Percentile

99.9%

JSON

Issue Overview:

CVE-2019-11477, CVE-2019-11478 and CVE-2019-11479 describe vulnerabilities in the Linux kernel that can be remotely exploited using a specially crafted TCP connection, crashing the targeted system.

The latest Amazon Linux 2 AMIs as available in AWS EC2 already contain these kernels and are not vulnerable.

Affected Packages:

kernel

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 kernel and reboot to update your system.

New Packages:

aarch64:  
    kernel-4.14.123-111.109.amzn2.aarch64  
    kernel-headers-4.14.123-111.109.amzn2.aarch64  
    kernel-debuginfo-common-aarch64-4.14.123-111.109.amzn2.aarch64  
    perf-4.14.123-111.109.amzn2.aarch64  
    perf-debuginfo-4.14.123-111.109.amzn2.aarch64  
    python-perf-4.14.123-111.109.amzn2.aarch64  
    python-perf-debuginfo-4.14.123-111.109.amzn2.aarch64  
    kernel-tools-4.14.123-111.109.amzn2.aarch64  
    kernel-tools-devel-4.14.123-111.109.amzn2.aarch64  
    kernel-tools-debuginfo-4.14.123-111.109.amzn2.aarch64  
    kernel-devel-4.14.123-111.109.amzn2.aarch64  
    kernel-debuginfo-4.14.123-111.109.amzn2.aarch64  
  
i686:  
    kernel-headers-4.14.123-111.109.amzn2.i686  
  
src:  
    kernel-4.14.123-111.109.amzn2.src  
  
x86_64:  
    kernel-4.14.123-111.109.amzn2.x86_64  
    kernel-headers-4.14.123-111.109.amzn2.x86_64  
    kernel-debuginfo-common-x86_64-4.14.123-111.109.amzn2.x86_64  
    perf-4.14.123-111.109.amzn2.x86_64  
    perf-debuginfo-4.14.123-111.109.amzn2.x86_64  
    python-perf-4.14.123-111.109.amzn2.x86_64  
    python-perf-debuginfo-4.14.123-111.109.amzn2.x86_64  
    kernel-tools-4.14.123-111.109.amzn2.x86_64  
    kernel-tools-devel-4.14.123-111.109.amzn2.x86_64  
    kernel-tools-debuginfo-4.14.123-111.109.amzn2.x86_64  
    kernel-devel-4.14.123-111.109.amzn2.x86_64  
    kernel-debuginfo-4.14.123-111.109.amzn2.x86_64

Additional References

Red Hat: CVE-2019-11477, CVE-2019-11478, CVE-2019-11479

Mitre: CVE-2019-11477, CVE-2019-11478, CVE-2019-11479

OSVersionArchitecturePackageVersionFilename
Amazon Linux2aarch64kernel< 4.14.123-111.109.amzn2kernel-4.14.123-111.109.amzn2.aarch64.rpm
Amazon Linux2aarch64kernel-headers< 4.14.123-111.109.amzn2kernel-headers-4.14.123-111.109.amzn2.aarch64.rpm
Amazon Linux2aarch64kernel-debuginfo-common-aarch64< 4.14.123-111.109.amzn2kernel-debuginfo-common-aarch64-4.14.123-111.109.amzn2.aarch64.rpm
Amazon Linux2aarch64perf< 4.14.123-111.109.amzn2perf-4.14.123-111.109.amzn2.aarch64.rpm
Amazon Linux2aarch64perf-debuginfo< 4.14.123-111.109.amzn2perf-debuginfo-4.14.123-111.109.amzn2.aarch64.rpm
Amazon Linux2aarch64python-perf< 4.14.123-111.109.amzn2python-perf-4.14.123-111.109.amzn2.aarch64.rpm
Amazon Linux2aarch64python-perf-debuginfo< 4.14.123-111.109.amzn2python-perf-debuginfo-4.14.123-111.109.amzn2.aarch64.rpm
Amazon Linux2aarch64kernel-tools< 4.14.123-111.109.amzn2kernel-tools-4.14.123-111.109.amzn2.aarch64.rpm
Amazon Linux2aarch64kernel-tools-devel< 4.14.123-111.109.amzn2kernel-tools-devel-4.14.123-111.109.amzn2.aarch64.rpm
Amazon Linux2aarch64kernel-tools-debuginfo< 4.14.123-111.109.amzn2kernel-tools-debuginfo-4.14.123-111.109.amzn2.aarch64.rpm
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7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

7.2 High

AI Score

Confidence

High

7.8 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:N/I:N/A:C

0.974 High

EPSS

Percentile

99.9%

JSON
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