CVE-2018-8344 — Microsoft Graphics Remote Code Execution Vulnerability

Executive Summary

A remote code execution vulnerability exists when the Windows font library improperly handles specially crafted embedded fonts. An attacker who successfully exploited the vulnerability could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. There are multiple ways an attacker could exploit the vulnerability: The security update addresses the vulnerability by correcting how the Windows font library handles embedded fonts.

Overview

7.8

CVSS HIGH

Critical

MS Severity

Not Exploited

MS Exploit Status

More Likely

MS Exploit Likelihood

Category Remote Code Execution

Released Aug 14 2018

Last Updated Aug 14 2018

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

CVSS Vector

ATTACK VECTOR

Local

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

None

USER INTERACTION

Required

SCOPE

Unchanged

CONFIDENTIALITY

High

INTEGRITY

High

AVAILABILITY

High

EXPLOIT CODE MATURITY

Proof-of-Concept

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 7.0

EPSS Score

No EPSS score available for this CVE.

View on FIRST.org

Affected Products

20 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows 10 for 32-bit Systems	`4343892 (Security Update)`	Critical	Remote Code Execution	Yes
Windows 10 for x64-based Systems	`4343892 (Security Update)`	Critical	Remote Code Execution	Yes
Windows 10 Version 1607 for 32-bit Systems	`4343887 (Security Update)`	Critical	Remote Code Execution	Yes
Windows 10 Version 1607 for x64-based Systems	`4343887 (Security Update)`	Critical	Remote Code Execution	Yes
Windows 10 Version 1703 for 32-bit Systems	`4343885 (Security Update)`	Critical	Remote Code Execution	Yes
Windows 10 Version 1703 for x64-based Systems	`4343885 (Security Update)`	Critical	Remote Code Execution	Yes
Windows 10 Version 1709 for 32-bit Systems	`4343897 (Security Update)`	Critical	Remote Code Execution	Yes
Windows 10 Version 1709 for x64-based Systems	`4343897 (Security Update)`	Critical	Remote Code Execution	Yes
Windows 10 Version 1803 for 32-bit Systems	`4343909 (Security Update)`	Critical	Remote Code Execution	Yes
Windows 10 Version 1803 for x64-based Systems	`4343909 (Security Update)`	Critical	Remote Code Execution	Yes
Windows 7 for 32-bit Systems Service Pack 1 4343900 (Monthly Rollup) 4343899 (Security Only) Critical Remote Code Execution 4338818 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows 7 for x64-based Systems Service Pack 1 4343900 (Monthly Rollup) 4343899 (Security Only) Critical Remote Code Execution 4338818 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows 8.1 for 32-bit systems 4343898 (Monthly Rollup) 4343888 (Security Only) Critical Remote Code Execution 4338815 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows 8.1 for x64-based systems 4343898 (Monthly Rollup) 4343888 (Security Only) Critical Remote Code Execution 4338815 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows RT 8.1	`4343898 (Monthly Rollup)`	Critical	Remote Code Execution	Yes
Windows Server 2008 for 32-bit Systems Service Pack 2	`4344104 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)	`4344104 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2008 for Itanium-Based Systems Service Pack 2	`4344104 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2008 for x64-based Systems Service Pack 2	`4344104 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)	`4344104 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 4343900 (Monthly Rollup) 4343899 (Security Only) Critical Remote Code Execution 4338818 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 4343900 (Monthly Rollup) 4343899 (Security Only) Critical Remote Code Execution 4338818 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 4343900 (Monthly Rollup) 4343899 (Security Only) Critical Remote Code Execution 4338818 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2012 4343901 (Monthly Rollup) 4343896 (Security Only) Critical Remote Code Execution 4338830 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2012 (Server Core installation) 4343901 (Monthly Rollup) 4343896 (Security Only) Critical Remote Code Execution 4338830 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2012 R2 4343898 (Monthly Rollup) 4343888 (Security Only) Critical Remote Code Execution 4338815 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2012 R2 (Server Core installation) 4343898 (Monthly Rollup) 4343888 (Security Only) Critical Remote Code Execution 4338815 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2016	`4343887 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2016 (Server Core installation)	`4343887 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server, version 1709 (Server Core Installation)	`4343897 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server, version 1803 (Server Core Installation)	`4343909 (Security Update)`	Critical	Remote Code Execution	Yes

Patches

7 patches

Article	Type	Restart
`4343892`	Security Update	Yes
`4343887`	Security Update	Yes
`4343885`	Security Update	Yes
`4343897`	Security Update	Yes
`4343909`	Security Update	Yes
`4343898`	Monthly Rollup	Yes
`4344104`	Security Update	Yes

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

Pengsu Cheng of Trend Micro working with Trend Micro's Zero Day Initiative

References

MSRC Advisory MITRE NVD