Microsoft · Security update · August 14, 2018

KB4343898: August 2018 security update

KB4343898, released August 14, 2018, fixes 22 CVEs across 9 products. 2 of them are being exploited (CVE-2018-8373); 2 on CISA KEV. Patch Radar priority: Patch now.

Patch now2 on CISA KEVKnown ransomware use1 publicly disclosed

CVEs closed

5 rated Critical

Exploited

CVE-2018-8373

Exploitation more likely

Microsoft's assessment

Highest EPSS

0.6790

99th percentile

Priority of the 22 CVEs

Patch now 2
                                Urgent 10
                                High 3
                                Routine 7

Applies to

Product
Internet Explorer 11 on Windows 8.1 for 32-bit systems
Internet Explorer 11 on Windows 8.1 for x64-based systems
Internet Explorer 11 on Windows RT 8.1
Internet Explorer 11 on Windows Server 2012 R2
Windows 8.1 for 32-bit systems
Windows 8.1 for x64-based systems
Windows RT 8.1
Windows Server 2012 R2
Windows Server 2012 R2 (Server Core installation)

CVEs this fix closes

Priority	CVE	Component	Impact	CVSS	EPSS	Exploitation
Patch now	CVE-2018-8373	Microsoft Scripting Engine	Remote Code Execution	6.4	0.6177	KEVDisclosedExploited
Patch now	CVE-2018-8405	Microsoft Graphics Component	Elevation of Privilege	7.0	0.0344	KEVRansomwareExploited
Urgent	CVE-2018-8355	Microsoft Scripting Engine	Remote Code Execution	4.2	0.6790	More likely
Urgent	CVE-2018-8353	Microsoft Scripting Engine	Remote Code Execution	6.4	0.6734	More likely
Urgent	CVE-2018-8389	Microsoft Scripting Engine	Remote Code Execution	6.4	0.3035	More likely
Urgent	CVE-2018-8372	Microsoft Scripting Engine	Remote Code Execution	4.2	0.2628	More likely
Urgent	CVE-2018-8344	Microsoft Graphics Component	Remote Code Execution	7.8	0.2298	More likely
Urgent	CVE-2018-8371	Microsoft Scripting Engine	Remote Code Execution	6.4	0.1538	More likely
Urgent	CVE-2018-8385	Microsoft Scripting Engine	Remote Code Execution	7.5	0.1517	More likely
Urgent	CVE-2018-8345	Microsoft Windows	Remote Code Execution	7.5	0.1490	More likely
Urgent	CVE-2018-8403	Microsoft Browsers	Remote Code Execution	4.2	0.1337	More likely
Urgent	CVE-2018-8404	Windows Kernel	Elevation of Privilege	7.0	0.0122	More likely
High	CVE-2018-8349	Windows COM	Remote Code Execution	7.0	0.2340	Exploitation Less Likely
High	CVE-2018-8343	Windows NDIS	Elevation of Privilege	7.0	0.0129	Exploitation Less Likely
High	CVE-2018-8339	Windows Installer	Elevation of Privilege	7.4	0.0116	Exploitation Less Likely
Routine	CVE-2018-8316	Internet Explorer	Remote Code Execution	6.4	0.1450	Exploitation Less Likely
Routine	CVE-2018-8394	Microsoft Graphics Component	Information Disclosure	4.7	0.0851	Exploitation Less Likely
Routine	CVE-2018-8398	Microsoft Graphics Component	Information Disclosure	4.7	0.0851	Exploitation Less Likely
Routine	CVE-2018-8351	Microsoft Browsers	Information Disclosure	4.2	0.0839	Exploitation Less Likely
Routine	CVE-2018-8340	Windows Authentication Methods	Security Feature Bypass	6.5	0.0789	Exploitation Less Likely
Routine	CVE-2018-8341	Windows Kernel	Information Disclosure	4.7	0.0285	Exploitation Less Likely
Routine	CVE-2018-8348	Windows Kernel	Information Disclosure	4.7	0.0235	Exploitation Less Likely

Released the same day

KB3213636
Microsoft Office 2010 Service Pack 2 (32-bit editions), Microsoft Office 2010 Service Pack 2 (64-bit editions)
KB4018310
Microsoft PowerPoint 2010 Service Pack 2 (32-bit editions), Microsoft PowerPoint 2010 Service Pack 2 (64-bit editions)
KB4018392
Microsoft SharePoint Enterprise Server 2013 Service Pack 1
KB4022195
Microsoft Excel Viewer 2007 Service Pack 3
KB4022198
Microsoft Office 2010 Service Pack 2 (32-bit editions), Microsoft Office 2010 Service Pack 2 (64-bit editions)
KB4022234
Microsoft SharePoint Enterprise Server 2013 Service Pack 1
KB4022236
Microsoft SharePoint Server 2013 Service Pack 1
KB4022238
Microsoft Office Web Apps 2013 Service Pack 1
KB4032212
Microsoft Office Compatibility Pack Service Pack 3
KB4032213
Microsoft Excel Viewer 2007 Service Pack 3
KB4032215
Word Automation Services on Microsoft SharePoint Server 2010 Service Pack 2
KB4032220
Microsoft Office Web Apps 2010 Service Pack 2

Vendor advisory

https://support.microsoft.com/help/4343898

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