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amazonAmazonALAS2-2019-1144
HistoryJan 07, 2019 - 10:07 p.m.

Important: NetworkManager

2019-01-0722:07:00
alas.aws.amazon.com
16

5.8 Medium

CVSS2

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

8.8 High

CVSS3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9.1 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

70.3%

Issue Overview:

It was discovered that systemd-network does not correctly keep track of a buffer size when constructing DHCPv6 packets. This flaw may lead to an integer underflow that can be used to produce an heap-based buffer overflow. A malicious host on the same network segment as the victim’s one may advertise itself as a DHCPv6 server and exploit this flaw to cause a Denial of Service or potentially gain code execution on the victim’s machine.(CVE-2018-15688)

Affected Packages:

NetworkManager

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 NetworkManager to update your system.

New Packages:

aarch64:  
    NetworkManager-1.12.0-8.amzn2.0.2.aarch64  
    NetworkManager-adsl-1.12.0-8.amzn2.0.2.aarch64  
    NetworkManager-bluetooth-1.12.0-8.amzn2.0.2.aarch64  
    NetworkManager-team-1.12.0-8.amzn2.0.2.aarch64  
    NetworkManager-wifi-1.12.0-8.amzn2.0.2.aarch64  
    NetworkManager-wwan-1.12.0-8.amzn2.0.2.aarch64  
    NetworkManager-ppp-1.12.0-8.amzn2.0.2.aarch64  
    NetworkManager-glib-1.12.0-8.amzn2.0.2.aarch64  
    NetworkManager-glib-devel-1.12.0-8.amzn2.0.2.aarch64  
    NetworkManager-libnm-1.12.0-8.amzn2.0.2.aarch64  
    NetworkManager-libnm-devel-1.12.0-8.amzn2.0.2.aarch64  
    NetworkManager-tui-1.12.0-8.amzn2.0.2.aarch64  
    NetworkManager-debuginfo-1.12.0-8.amzn2.0.2.aarch64  
  
i686:  
    NetworkManager-1.12.0-8.amzn2.0.2.i686  
    NetworkManager-adsl-1.12.0-8.amzn2.0.2.i686  
    NetworkManager-bluetooth-1.12.0-8.amzn2.0.2.i686  
    NetworkManager-team-1.12.0-8.amzn2.0.2.i686  
    NetworkManager-wifi-1.12.0-8.amzn2.0.2.i686  
    NetworkManager-wwan-1.12.0-8.amzn2.0.2.i686  
    NetworkManager-ppp-1.12.0-8.amzn2.0.2.i686  
    NetworkManager-glib-1.12.0-8.amzn2.0.2.i686  
    NetworkManager-glib-devel-1.12.0-8.amzn2.0.2.i686  
    NetworkManager-libnm-1.12.0-8.amzn2.0.2.i686  
    NetworkManager-libnm-devel-1.12.0-8.amzn2.0.2.i686  
    NetworkManager-tui-1.12.0-8.amzn2.0.2.i686  
    NetworkManager-debuginfo-1.12.0-8.amzn2.0.2.i686  
  
noarch:  
    NetworkManager-config-server-1.12.0-8.amzn2.0.2.noarch  
    NetworkManager-dispatcher-routing-rules-1.12.0-8.amzn2.0.2.noarch  
  
src:  
    NetworkManager-1.12.0-8.amzn2.0.2.src  
  
x86_64:  
    NetworkManager-1.12.0-8.amzn2.0.2.x86_64  
    NetworkManager-adsl-1.12.0-8.amzn2.0.2.x86_64  
    NetworkManager-bluetooth-1.12.0-8.amzn2.0.2.x86_64  
    NetworkManager-team-1.12.0-8.amzn2.0.2.x86_64  
    NetworkManager-wifi-1.12.0-8.amzn2.0.2.x86_64  
    NetworkManager-wwan-1.12.0-8.amzn2.0.2.x86_64  
    NetworkManager-ppp-1.12.0-8.amzn2.0.2.x86_64  
    NetworkManager-glib-1.12.0-8.amzn2.0.2.x86_64  
    NetworkManager-glib-devel-1.12.0-8.amzn2.0.2.x86_64  
    NetworkManager-libnm-1.12.0-8.amzn2.0.2.x86_64  
    NetworkManager-libnm-devel-1.12.0-8.amzn2.0.2.x86_64  
    NetworkManager-tui-1.12.0-8.amzn2.0.2.x86_64  
    NetworkManager-debuginfo-1.12.0-8.amzn2.0.2.x86_64  

Additional References

Red Hat: CVE-2018-15688

Mitre: CVE-2018-15688

5.8 Medium

CVSS2

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

8.8 High

CVSS3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9.1 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

70.3%