CVE-2018-3646

2018-08-1400:00:00

ubuntu.com

5.6 Medium

CVSS3

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

4.7 Medium

CVSS2

Access Vector

LOCAL

Access 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

0.0004 Low

EPSS

Percentile

12.4%

JSON

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.

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

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	intel-microcode	< 3.20180807a.0ubuntu0.18.04.1	UNKNOWN
ubuntu	14.04	noarch	intel-microcode	< 3.20180807a.0ubuntu0.14.04.1	UNKNOWN
ubuntu	16.04	noarch	intel-microcode	< 3.20180807a.0ubuntu0.16.04.1	UNKNOWN
ubuntu	18.04	noarch	linux	< 4.15.0-32.35	UNKNOWN
ubuntu	14.04	noarch	linux	< 3.13.0-155.205	UNKNOWN
ubuntu	16.04	noarch	linux	< 4.4.0-133.159	UNKNOWN
ubuntu	18.04	noarch	linux-aws	< 4.15.0-1019.19	UNKNOWN
ubuntu	14.04	noarch	linux-aws	< 4.4.0-1027.30	UNKNOWN
ubuntu	16.04	noarch	linux-aws	< 4.4.0-1065.75	UNKNOWN
ubuntu	18.04	noarch	linux-azure	< 4.15.0-1021.21	UNKNOWN