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ubuntucveUbuntu.comUB:CVE-2018-5391
HistoryAug 14, 2018 - 12:00 a.m.

CVE-2018-5391

2018-08-1400:00:00
ubuntu.com
ubuntu.com
46

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

0.016 Low

EPSS

Percentile

87.0%

JSON

The Linux kernel, versions 3.9+, is vulnerable to a denial of service
attack with low rates of specially modified packets targeting IP fragment
re-assembly. An attacker may cause a denial of service condition by sending
specially crafted IP fragments. Various vulnerabilities in IP fragmentation
have been discovered and fixed over the years. The current vulnerability
(CVE-2018-5391) became exploitable in the Linux kernel with the increase of
the IP fragment reassembly queue size.

Notes

Author Note
tyhicks CERT recommends reverting c2a936600f78aea00d3312ea4b66a79a4619f9b4
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-32.35UNKNOWN
ubuntu14.04noarchlinux< 3.13.0-155.205UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-133.159UNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1019.19UNKNOWN
ubuntu14.04noarchlinux-aws< 4.4.0-1027.30UNKNOWN
ubuntu16.04noarchlinux-aws< 4.4.0-1065.75UNKNOWN
ubuntu18.04noarchlinux-azure< 4.15.0-1021.21UNKNOWN
ubuntu16.04noarchlinux-azure< 4.15.0-1021.21~16.04.1UNKNOWN
ubuntu16.04noarchlinux-azure-edge< 4.15.0-1021.21UNKNOWN
ubuntu16.04noarchlinux-euclid< 4.4.0-9029.31UNKNOWN
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1-10 of 211

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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

0.016 Low

EPSS

Percentile

87.0%

JSON
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