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SpiderLabs Blog

Patch Tuesday, August 2019

The August Patch Tuesday is here ringing in patches for a massive 97 CVEs. Across those CVEs 31 are rated as "Critical", 65 as "Important" and one as "Moderate".

On the "Critical" list are several Remote Code Execution (RCE) vulnerabilities including those that affect Hyper-V and Remote Desktop Services, services that are often exposed publicly. There are also RCE vulnerabilities in Outlook and Word where a maliciously crafted document or email could allow an attacker to execute their code. Luckily the Outlook vulnerability can't be triggered by the simply using the Preview pane. A similar RCE affects .LNK or 'shortcuts' files, where an attacker could craft a malicious shortcut and would only need to get their target or victim to click on it to execute their code. There is also an RCE vulnerability in both DHCP servers and clients that could be triggered with a malicious DHCP lease request or response. DHCP is used to provide computers with network configuration information like IP address and DNS information.

On the "Important" list are several major Denial of Service vulnerabilities that affect HTTP/2 based web servers, including Windows HTTP protocol stack (CVE-2019-9511, CVE-2019-9512, CVE-2019-9513, CVE-2019-9514, CVE-2019-9518). There are also plenty of privilege escalation vulnerabilities in multiple software packages, including the Windows operating system itself. A vulnerability that might interest security professionals is a privilege escalation bug in Windows Defender, Microsoft's antimalware software. Specifically, the binary MpSigStub.exe could allow for arbitrary file deletion regardless of the user's access or privilege.

Luckily there are currently no public exploits for these vulnerabilities, but that's likely to change now that they've been disclosed. So get to patching and stay safe!



Chakra Scripting Engine Memory Corruption Vulnerability
CVE-2019-1131, CVE-2019-1139, CVE-2019-1140, CVE-2019-1141, CVE-2019-1195, CVE-2019-1196, CVE-2019-1197
Remote Code Execution

Hyper-V Remote Code Execution Vulnerability
Remote Code Execution

LNK Remote Code Execution Vulnerability
Remote Code Execution

Microsoft Graphics Remote Code Execution Vulnerability
CVE-2019-1144, CVE-2019-1145, CVE-2019-1149, CVE-2019-1150, CVE-2019-1151, CVE-2019-1152
Remote Code Execution

Microsoft Outlook Elevation of Privilege Vulnerability
Elevation of Privilege

Microsoft Outlook Memory Corruption Vulnerability
Remote Code Execution

Microsoft Outlook Remote Code Execution Vulnerability
Remote Code Execution

Microsoft Word Remote Code Execution Vulnerability
CVE-2019-1201, CVE-2019-1205
Remote Code Execution

Remote Desktop Services Remote Code Execution Vulnerability
CVE-2019-1181, CVE-2019-1182, CVE-2019-1222, CVE-2019-1226
Remote Code Execution

Scripting Engine Memory Corruption Vulnerability
CVE-2019-1133, CVE-2019-1194
Remote Code Execution

Windows DHCP Client Remote Code Execution Vulnerability
Remote Code Execution

Windows DHCP Server Remote Code Execution Vulnerability
Remote Code Execution

Windows Hyper-V Remote Code Execution Vulnerability
Remote Code Execution

Windows VBScript Engine Remote Code Execution Vulnerability
Remote Code Execution

Microsoft Live Accounts Elevation of Privilege Vulnerability
Elevation of Privilege



Azure DevOps Server Information Disclosure Vulnerability
Information Disclosure

DirectX Elevation of Privilege Vulnerability
Elevation of Privilege

Encryption Key Negotiation of Bluetooth Vulnerability

Git for Visual Studio Elevation of Privilege Vulnerability
Elevation of Privilege

HTTP/2 Server Denial of Service Vulnerability
CVE-2019-9511, CVE-2019-9512, CVE-2019-9513, CVE-2019-9514, CVE-2019-9518
Denial of Service

Jet Database Engine Remote Code Execution Vulnerability
CVE-2019-1146, CVE-2019-1147, CVE-2019-1155, CVE-2019-1156, CVE-2019-1157
Remote Code Execution

Microsoft Browser Memory Corruption Vulnerability
Remote Code Execution

Microsoft Browsers Security Feature Bypass Vulnerability
Security Feature Bypass

Microsoft Defender Elevation of Privilege Vulnerability
Elevation of Privilege

Microsoft Edge Information Disclosure Vulnerability
Information Disclosure

Microsoft Graphics Component Information Disclosure Vulnerability
CVE-2019-1078, CVE-2019-1148, CVE-2019-1153
Information Disclosure

Microsoft Office SharePoint XSS Vulnerability

Microsoft SharePoint Information Disclosure Vulnerability
Information Disclosure

Microsoft Windows Elevation of Privilege Vulnerability
Elevation of Privilege

Microsoft Windows p2pimsvc Elevation of Privilege Vulnerability
Elevation of Privilege

MS XML Remote Code Execution Vulnerability
Remote Code Execution

Outlook iOS Spoofing Vulnerability

Remote Desktop Protocol Server Information Disclosure Vulnerability
CVE-2019-1224, CVE-2019-1225
Information Disclosure

SymCrypt Information Disclosure Vulnerability
Information Disclosure

Win32k Elevation of Privilege Vulnerability
Elevation of Privilege

Windows ALPC Elevation of Privilege Vulnerability
Elevation of Privilege

Windows Denial of Service Vulnerability
Denial of Service

Windows DHCP Server Denial of Service Vulnerability
CVE-2019-1206, CVE-2019-1212
Denial of Service

Windows Elevation of Privilege Vulnerability
CVE-2019-1173, CVE-2019-1174, CVE-2019-1175, CVE-2019-1177, CVE-2019-1178, CVE-2019-1179, CVE-2019-1180, CVE-2019-1184, CVE-2019-1186
Elevation of Privilege

Windows File Signature Security Feature Bypass Vulnerability
Security Feature Bypass

Windows Graphics Component Information Disclosure Vulnerability
CVE-2019-1143, CVE-2019-1154, CVE-2019-1158
Information Disclosure

Windows Hyper-V Denial of Service Vulnerability
CVE-2019-0714, CVE-2019-0715, CVE-2019-0717, CVE-2019-0718, CVE-2019-0723
Denial of Service

Windows Image Elevation of Privilege Vulnerability
Elevation of Privilege

Windows Information Disclosure Vulnerability
Information Disclosure

Windows Kernel Elevation of Privilege Vulnerability
CVE-2019-1159, CVE-2019-1164
Elevation of Privilege

Windows Kernel Information Disclosure Vulnerability
CVE-2019-1227, CVE-2019-1228
Information Disclosure

Windows NTFS Elevation of Privilege Vulnerability
Security Feature Bypass

Windows Remote Desktop Protocol (RDP) Denial of Service Vulnerability
Denial of Service

Windows Subsystem for Linux Elevation of Privilege Vulnerability
Elevation of Privilege

XmlLite Runtime Denial of Service Vulnerability
Denial of Service

Microsoft Dynamics
Remote Code Execution

Microsoft Guidance for Enabling LDAP Channel Binding and LDAP Signing
Elevation of Privilege



Win32k Elevation of Privilege Vulnerability
Elevation of Privilege

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