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amazonAmazonALAS-2016-740
HistorySep 01, 2016 - 6:00 p.m.

Medium: kernel

2016-09-0118:00:00
alas.aws.amazon.com
48

4.9 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.0004 Low

EPSS

Percentile

15.8%

Issue Overview:

A use after free vulnerability was found in tcp_xmit_retransmit_queue and other tcp_* functions.

Affected Packages:

kernel

Issue Correction:
Run yum update kernel to update your system. You will need to reboot your system in order for the new kernel to be running.

New Packages:

i686:  
    kernel-devel-4.4.19-29.55.amzn1.i686  
    kernel-headers-4.4.19-29.55.amzn1.i686  
    kernel-debuginfo-common-i686-4.4.19-29.55.amzn1.i686  
    kernel-tools-4.4.19-29.55.amzn1.i686  
    kernel-tools-debuginfo-4.4.19-29.55.amzn1.i686  
    kernel-debuginfo-4.4.19-29.55.amzn1.i686  
    kernel-tools-devel-4.4.19-29.55.amzn1.i686  
    kernel-4.4.19-29.55.amzn1.i686  
    perf-debuginfo-4.4.19-29.55.amzn1.i686  
    perf-4.4.19-29.55.amzn1.i686  
  
noarch:  
    kernel-doc-4.4.19-29.55.amzn1.noarch  
  
src:  
    kernel-4.4.19-29.55.amzn1.src  
  
x86_64:  
    kernel-debuginfo-4.4.19-29.55.amzn1.x86_64  
    perf-4.4.19-29.55.amzn1.x86_64  
    perf-debuginfo-4.4.19-29.55.amzn1.x86_64  
    kernel-tools-4.4.19-29.55.amzn1.x86_64  
    kernel-tools-devel-4.4.19-29.55.amzn1.x86_64  
    kernel-tools-debuginfo-4.4.19-29.55.amzn1.x86_64  
    kernel-4.4.19-29.55.amzn1.x86_64  
    kernel-devel-4.4.19-29.55.amzn1.x86_64  
    kernel-headers-4.4.19-29.55.amzn1.x86_64  
    kernel-debuginfo-common-x86_64-4.4.19-29.55.amzn1.x86_64  

Additional References

Red Hat: CVE-2016-6828

Mitre: CVE-2016-6828

4.9 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.0004 Low

EPSS

Percentile

15.8%