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amazonAmazonALAS2-2019-1145
HistoryJan 07, 2019 - 10:25 p.m.

Medium: kernel

2019-01-0722:25:00
alas.aws.amazon.com
29

6.8 Medium

CVSS3

Attack Vector

PHYSICAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

7.6 High

AI Score

Confidence

High

7.2 High

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.003 Low

EPSS

Percentile

67.9%

Issue Overview:

The USB subsystem mishandles size checks during the reading of an extra descriptor, related to __usb_get_extra_descriptor in drivers/usb/core/usb.c.(CVE-2018-20169)

A flaw was found where an attacker may be able to have an uncontrolled read to kernel-memory from within a vm guest. A race condition between connect() and close() function may allow an attacker using the AF_VSOCK protocol to gather a 4 byte information leak or possibly impersonate AF_VSOCK messages destined to other clients or leak kernel memory.(CVE-2018-14625)

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:

aarch64:  
    kernel-4.14.88-88.76.amzn2.aarch64  
    kernel-headers-4.14.88-88.76.amzn2.aarch64  
    kernel-debuginfo-common-aarch64-4.14.88-88.76.amzn2.aarch64  
    perf-4.14.88-88.76.amzn2.aarch64  
    perf-debuginfo-4.14.88-88.76.amzn2.aarch64  
    python-perf-4.14.88-88.76.amzn2.aarch64  
    python-perf-debuginfo-4.14.88-88.76.amzn2.aarch64  
    kernel-tools-4.14.88-88.76.amzn2.aarch64  
    kernel-tools-devel-4.14.88-88.76.amzn2.aarch64  
    kernel-tools-debuginfo-4.14.88-88.76.amzn2.aarch64  
    kernel-devel-4.14.88-88.76.amzn2.aarch64  
    kernel-debuginfo-4.14.88-88.76.amzn2.aarch64  
  
i686:  
    kernel-headers-4.14.88-88.76.amzn2.i686  
  
src:  
    kernel-4.14.88-88.76.amzn2.src  
  
x86_64:  
    kernel-4.14.88-88.76.amzn2.x86_64  
    kernel-headers-4.14.88-88.76.amzn2.x86_64  
    kernel-debuginfo-common-x86_64-4.14.88-88.76.amzn2.x86_64  
    perf-4.14.88-88.76.amzn2.x86_64  
    perf-debuginfo-4.14.88-88.76.amzn2.x86_64  
    python-perf-4.14.88-88.76.amzn2.x86_64  
    python-perf-debuginfo-4.14.88-88.76.amzn2.x86_64  
    kernel-tools-4.14.88-88.76.amzn2.x86_64  
    kernel-tools-devel-4.14.88-88.76.amzn2.x86_64  
    kernel-tools-debuginfo-4.14.88-88.76.amzn2.x86_64  
    kernel-devel-4.14.88-88.76.amzn2.x86_64  
    kernel-debuginfo-4.14.88-88.76.amzn2.x86_64  

Additional References

Red Hat: CVE-2018-14625, CVE-2018-20169

Mitre: CVE-2018-14625, CVE-2018-20169

6.8 Medium

CVSS3

Attack Vector

PHYSICAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

7.6 High

AI Score

Confidence

High

7.2 High

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.003 Low

EPSS

Percentile

67.9%