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ubuntucveUbuntu.comUB:CVE-2018-3646
HistoryAug 14, 2018 - 12:00 a.m.

CVE-2018-3646

2018-08-1400:00:00
ubuntu.com
ubuntu.com
29

CVSS2

4.7

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

5.6

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

EPSS

0

Percentile

13.3%

Systems with microprocessors utilizing speculative execution and address
translations may allow unauthorized disclosure of information residing in
the L1 data cache to an attacker with local user access with guest OS
privilege via a terminal page fault and a side-channel analysis.

Notes

Author Note
tyhicks A microcode update will be provided to allow the kernel to flush the L1D cache on VM entry. However, the kernel has a software fallback mechanism in place when microcode updates are not available/installed. The break-fix lines for this CVE are not complete since a large number of patches are required to mitigate this issue. The commit(s) listed are chosen as placeholders for automated CVE triage purposes.
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchintel-microcode< 3.20180807a.0ubuntu0.18.04.1UNKNOWN
ubuntu14.04noarchintel-microcode< 3.20180807a.0ubuntu0.14.04.1UNKNOWN
ubuntu16.04noarchintel-microcode< 3.20180807a.0ubuntu0.16.04.1UNKNOWN
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
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CVSS2

4.7

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

5.6

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

EPSS

0

Percentile

13.3%