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amazonAmazonALAS2-2018-1044
HistoryJun 27, 2018 - 9:55 p.m.

Medium: kernel

2018-06-2721:55:00
alas.aws.amazon.com
8

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

7.7 High

AI Score

Confidence

High

7.1 High

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

0.006 Low

EPSS

Percentile

78.1%

Issue Overview:

A NULL pointer dereference issue was found in the Linux kernel. If the close() and fchownat() system calls share a socket file descriptor as an argument, then the two calls can race and trigger a NULL pointer dereference leading to a system crash and a denial of service.(CVE-2018-12232)

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 to update your system.

New Packages:

i686:  
    kernel-headers-4.14.51-66.38.amzn2.i686  
  
src:  
    kernel-4.14.51-66.38.amzn2.src  
  
x86_64:  
    kernel-4.14.51-66.38.amzn2.x86_64  
    kernel-headers-4.14.51-66.38.amzn2.x86_64  
    kernel-debuginfo-common-x86_64-4.14.51-66.38.amzn2.x86_64  
    perf-4.14.51-66.38.amzn2.x86_64  
    perf-debuginfo-4.14.51-66.38.amzn2.x86_64  
    python-perf-4.14.51-66.38.amzn2.x86_64  
    python-perf-debuginfo-4.14.51-66.38.amzn2.x86_64  
    kernel-tools-4.14.51-66.38.amzn2.x86_64  
    kernel-tools-devel-4.14.51-66.38.amzn2.x86_64  
    kernel-tools-debuginfo-4.14.51-66.38.amzn2.x86_64  
    kernel-devel-4.14.51-66.38.amzn2.x86_64  
    kernel-debuginfo-4.14.51-66.38.amzn2.x86_64  

Additional References

Red Hat: CVE-2018-12232

Mitre: CVE-2018-12232

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

7.7 High

AI Score

Confidence

High

7.1 High

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

0.006 Low

EPSS

Percentile

78.1%