Along with "Spring Showers" up here in the Northern Hemisphere, April also brings with it Microsoft's Patch Tuesday. This release includes patches for 75 CVEs and Adobe's Flash Update. The 75 CVEs are split between 14 rated "Critical" and 61 rated "Important". Outside of the typical Scripting Engine and XML Remote Code Execution (RCE) vulnerabilities, one vulnerability stands out as new. The vulnerability is in what is known as the IOleCvt ASP interface. The IOleCvt object enables an ASP Web page to perform string conversions, for instance from a Unicode string to ANSI. An attacker could exploit this by setting up a website or creating a malicious MS Office document that will trigger the vulnerability and execute arbitrary code on the victim's system.
The list of CVEs rated as "Important" are primarily the usual suspects in the MS Office Suite and Windows OS core components. Some of the stand-outs include a Denial of Service (DoS) vulnerability in ASP.NET Core, a Privilege Escalation vulnerability in Azure DevOps Server and two Spoofing vulnerabilities in Microsoft Exchange Server. Specifically the Microsoft Exchange vulnerabilities reside in Outlook Web Access (OWA) and could allow an attacker to inject content including malicious scripts into an OWA session by convincing a user to click on a malicious link.
Luckily none of this month's vulnerabilities have been disclosed prior to today and there is no indication that there are any exploits in the wild. This means that you have a great opportunity to patch now before criminals are able to get their act together.
Critical
April 2019 Adobe Flash Security Update
ADV190011
Remote Code Execution
Chakra Scripting Engine Memory Corruption Vulnerability
CVE-2019-0806, CVE-2019-0810, CVE-2019-0812, CVE-2019-0829, CVE-2019-0860, CVE-2019-0861
Remote Code Execution
GDI+ Remote Code Execution Vulnerability
CVE-2019-0853
Remote Code Execution
MS XML Remote Code Execution Vulnerability
CVE-2019-0791, CVE-2019-0792, CVE-2019-0793
Remote Code Execution
Scripting Engine Memory Corruption Vulnerability
CVE-2019-0739, CVE-2019-0753
Remote Code Execution
SMB Server Elevation of Privilege Vulnerability
CVE-2019-0786
Remote Code Execution
Windows IOleCvt Interface Remote Code Execution Vulnerability
CVE-2019-0845
Remote Code Execution
Important
ASP.NET Core Denial of Service Vulnerability
CVE-2019-0815
Denial of Service
Azure DevOps Server Elevation of Privilege Vulnerability
CVE-2019-0875
Elevation of Privilege
DirectX Information Disclosure Vulnerability
CVE-2019-0837
Information Disclosure
Jet Database Engine Remote Code Execution Vulnerability
CVE-2019-0846, CVE-2019-0847, CVE-2019-0851, CVE-2019-0877, CVE-2019-0879
Remote Code Execution
Microsoft Browsers Tampering Vulnerability
CVE-2019-0764
Tampering
Microsoft Edge Information Disclosure Vulnerability
CVE-2019-0833
Information Disclosure
Microsoft Excel Remote Code Execution Vulnerability
CVE-2019-0828
Remote Code Execution
Microsoft Exchange Spoofing Vulnerability
CVE-2019-0817, CVE-2019-0858
Spoofing
Microsoft Graphics Components Remote Code Execution Vulnerability
CVE-2019-0822
Remote Code Execution
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
CVE-2019-0823, CVE-2019-0824, CVE-2019-0825, CVE-2019-0826, CVE-2019-0827
Remote Code Execution
Microsoft Office SharePoint XSS Vulnerability
CVE-2019-0830, CVE-2019-0831
Important
Microsoft Scripting Engine Information Disclosure Vulnerability
CVE-2019-0835
Information Disclosure
MS XML Remote Code Execution Vulnerability
CVE-2019-0790, CVE-2019-0795
Remote Code Execution
Office Remote Code Execution Vulnerability
CVE-2019-0801
Remote Code Execution
Open Enclave SDK Information Disclosure Vulnerability
CVE-2019-0876
Information Disclosure
Scripting Engine Memory Corruption Vulnerability
CVE-2019-0752
Remote Code Execution
Team Foundation Server Cross-site Scripting Vulnerability
CVE-2019-0866, CVE-2019-0867, CVE-2019-0868, CVE-2019-0870, CVE-2019-0871, CVE-2019-0872, CVE-2019-0874
Spoofing
Team Foundation Server HTML Injection Vulnerability
CVE-2019-0869
Spoofing
Team Foundation Server Spoofing Vulnerability
CVE-2019-0857
Spoofing
VBScript Remote Code Execution Vulnerability
CVE-2019-0794
Remote Code Execution
Win32k Elevation of Privilege Vulnerability
CVE-2019-0685, CVE-2019-0803, CVE-2019-0859, CVE-2019-0814, CVE-2019-0848
Information Disclosure
Windows Admin Center Elevation of Privilege Vulnerability
CVE-2019-0813
Elevation of Privilege
Windows CSRSS Elevation of Privilege Vulnerability
CVE-2019-0735
Elevation of Privilege
Windows Elevation of Privilege Vulnerability
CVE-2019-0730, CVE-2019-0731, CVE-2019-0796, CVE-2019-0805, CVE-2019-0836, CVE-2019-0841
Elevation of Privilege
Windows GDI Information Disclosure Vulnerability
CVE-2019-0802, CVE-2019-0849
Information Disclosure
Windows Information Disclosure Vulnerability
CVE-2019-0838, CVE-2019-0839
Information Disclosure
Windows Kernel Information Disclosure Vulnerability
CVE-2019-0840, CVE-2019-0844
Information Disclosure
Windows Remote Code Execution Vulnerability
CVE-2019-0856
Remote Code Execution
Windows Security Feature Bypass Vulnerability
CVE-2019-0732
Security Feature Bypass
Windows TCP/IP Information Disclosure Vulnerability
CVE-2019-0688
Information Disclosure
Windows VBScript Engine Remote Code Execution Vulnerability
CVE-2019-0842, CVE-2019-0862
Remote Code Execution
No Severity
Latest Servicing Stack Updates
ADV990001
