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amazonAmazonALAS-2019-1222
HistoryJun 13, 2019 - 9:37 p.m.

Critical: kernel

2019-06-1321:37:00
alas.aws.amazon.com
265

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

7.8 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 AMIs as available in AWS EC2 already contain these kernels and are not vulnerable.

Affected Packages:

kernel

Issue Correction:
Run yum update kernel and reboot to update your system.

New Packages:

i686:  
    kernel-debuginfo-4.14.123-86.109.amzn1.i686  
    perf-debuginfo-4.14.123-86.109.amzn1.i686  
    kernel-tools-4.14.123-86.109.amzn1.i686  
    kernel-devel-4.14.123-86.109.amzn1.i686  
    kernel-tools-debuginfo-4.14.123-86.109.amzn1.i686  
    kernel-tools-devel-4.14.123-86.109.amzn1.i686  
    kernel-4.14.123-86.109.amzn1.i686  
    kernel-debuginfo-common-i686-4.14.123-86.109.amzn1.i686  
    kernel-headers-4.14.123-86.109.amzn1.i686  
    perf-4.14.123-86.109.amzn1.i686  
  
src:  
    kernel-4.14.123-86.109.amzn1.src  
  
x86_64:  
    kernel-devel-4.14.123-86.109.amzn1.x86_64  
    kernel-tools-4.14.123-86.109.amzn1.x86_64  
    kernel-tools-devel-4.14.123-86.109.amzn1.x86_64  
    kernel-debuginfo-4.14.123-86.109.amzn1.x86_64  
    kernel-headers-4.14.123-86.109.amzn1.x86_64  
    kernel-tools-debuginfo-4.14.123-86.109.amzn1.x86_64  
    perf-debuginfo-4.14.123-86.109.amzn1.x86_64  
    kernel-4.14.123-86.109.amzn1.x86_64  
    kernel-debuginfo-common-x86_64-4.14.123-86.109.amzn1.x86_64  
    perf-4.14.123-86.109.amzn1.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 Linux1i686kernel-debuginfo< 4.14.123-86.109.amzn1kernel-debuginfo-4.14.123-86.109.amzn1.i686.rpm
Amazon Linux1i686perf-debuginfo< 4.14.123-86.109.amzn1perf-debuginfo-4.14.123-86.109.amzn1.i686.rpm
Amazon Linux1i686kernel-tools< 4.14.123-86.109.amzn1kernel-tools-4.14.123-86.109.amzn1.i686.rpm
Amazon Linux1i686kernel-devel< 4.14.123-86.109.amzn1kernel-devel-4.14.123-86.109.amzn1.i686.rpm
Amazon Linux1i686kernel-tools-debuginfo< 4.14.123-86.109.amzn1kernel-tools-debuginfo-4.14.123-86.109.amzn1.i686.rpm
Amazon Linux1i686kernel-tools-devel< 4.14.123-86.109.amzn1kernel-tools-devel-4.14.123-86.109.amzn1.i686.rpm
Amazon Linux1i686kernel< 4.14.123-86.109.amzn1kernel-4.14.123-86.109.amzn1.i686.rpm
Amazon Linux1i686kernel-debuginfo-common-i686< 4.14.123-86.109.amzn1kernel-debuginfo-common-i686-4.14.123-86.109.amzn1.i686.rpm
Amazon Linux1i686kernel-headers< 4.14.123-86.109.amzn1kernel-headers-4.14.123-86.109.amzn1.i686.rpm
Amazon Linux1i686perf< 4.14.123-86.109.amzn1perf-4.14.123-86.109.amzn1.i686.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

7.8 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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