It's that time of the month where Microsoft runs a broom through its services to clean them of bugs. April's Patch Tuesday yesterday solved 74 vulnerability across Microsoft solutions, including two Windows zero-day flaws that have already been exploited.
Microsoft explains the two vulnerabilities exposed the same vulnerability. Both zero-days allowed attackers to elevate privileges on Win32k, a major part of the running operation of the Windows OS.
The company lists the flaws as CVE-2019-0803 and CVE-2019-0859. Microsoft names the vulnerabilities as the same, even though they were both found independently by Kaspersky Lab and Alibaba Cloud Intelligence.
Win32k was found to be failing to handle memory properly. An attacker exploiting this flaw could run arbitrary code in the kernel and gain system rights. Once with privileges, a bad actor could make changes to data, delete content, create new accounts, or install other malicious programs.
It is worth noting to gain access the attacker would need physical access to log onto the system. Microsoft says the problem has been solved and Win32k now handles memory securely. However, the company says both vulnerabilities have had active exploits.
Elsewhere, Microsoft detailed other non-zero-day bugs affecting its services. Three issues were found in Office Access Connectivity (CVE-2019-0824, CVE-2019-0825, CVE-2019-0827). Each of these vulnerabilities would allow hackers to execute malicious code. These are interesting problems because the attacker could exploit them remotely.
Full Patch Tuesday Log
| Tag | CVE ID | CVE Title |
|---|---|---|
| Servicing Stack Updates | ADV990001 | Latest Servicing Stack Updates |
| Adobe Flash Player | ADV190011 | April 2019 Adobe Flash Security Update |
| .NET Core | CVE-2019-0815 | ASP.NET Core Denial of Service Vulnerability |
| CSRSS | CVE-2019-0735 | Windows CSRSS Elevation of Privilege Vulnerability |
| Microsoft Browsers | CVE-2019-0764 | Microsoft Browsers Tampering Vulnerability |
| Microsoft Edge | CVE-2019-0833 | Microsoft Edge Information Disclosure Vulnerability |
| Microsoft Exchange Server | CVE-2019-0817 | Microsoft Exchange Spoofing Vulnerability |
| Microsoft Exchange Server | CVE-2019-0858 | Microsoft Exchange Spoofing Vulnerability |
| Microsoft Graphics Component | CVE-2019-0803 | Win32k Elevation of Privilege Vulnerability |
| Microsoft Graphics Component | CVE-2019-0802 | Windows GDI Information Disclosure Vulnerability |
| Microsoft Graphics Component | CVE-2019-0849 | Windows GDI Information Disclosure Vulnerability |
| Microsoft Graphics Component | CVE-2019-0853 | GDI+ Remote Code Execution Vulnerability |
| Microsoft JET Database Engine | CVE-2019-0851 | Jet Database Engine Remote Code Execution Vulnerability |
| Microsoft JET Database Engine | CVE-2019-0879 | Jet Database Engine Remote Code Execution Vulnerability |
| Microsoft JET Database Engine | CVE-2019-0877 | Jet Database Engine Remote Code Execution Vulnerability |
| Microsoft JET Database Engine | CVE-2019-0847 | Jet Database Engine Remote Code Execution Vulnerability |
| Microsoft JET Database Engine | CVE-2019-0846 | Jet Database Engine Remote Code Execution Vulnerability |
| Microsoft Office | CVE-2019-0826 | Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability |
| Microsoft Office | CVE-2019-0801 | Office Remote Code Execution Vulnerability |
| Microsoft Office | CVE-2019-0823 | Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability |
| Microsoft Office | CVE-2019-0828 | Microsoft Excel Remote Code Execution Vulnerability |
| Microsoft Office | CVE-2019-0822 | Microsoft Graphics Components Remote Code Execution Vulnerability |
| Microsoft Office | CVE-2019-0827 | Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability |
| Microsoft Office | CVE-2019-0824 | Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability |
| Microsoft Office | CVE-2019-0825 | Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability |
| Microsoft Office SharePoint | CVE-2019-0831 | Microsoft Office SharePoint XSS Vulnerability |
| Microsoft Office SharePoint | CVE-2019-0830 | Microsoft Office SharePoint XSS Vulnerability |
| Microsoft Scripting Engine | CVE-2019-0752 | Scripting Engine Memory Corruption Vulnerability |
| Microsoft Scripting Engine | CVE-2019-0861 | Chakra Scripting Engine Memory Corruption Vulnerability |
| Microsoft Scripting Engine | CVE-2019-0862 | Scripting Engine Memory Corruption Vulnerability |
| Microsoft Scripting Engine | CVE-2019-0860 | Chakra Scripting Engine Memory Corruption Vulnerability |
| Microsoft Scripting Engine | CVE-2019-0835 | Microsoft Scripting Engine Information Disclosure Vulnerability |
| Microsoft Scripting Engine | CVE-2019-0753 | Scripting Engine Memory Corruption Vulnerability |
| Microsoft Scripting Engine | CVE-2019-0806 | Chakra Scripting Engine Memory Corruption Vulnerability |
| Microsoft Scripting Engine | CVE-2019-0739 | Scripting Engine Memory Corruption Vulnerability |
| Microsoft Scripting Engine | CVE-2019-0810 | Chakra Scripting Engine Memory Corruption Vulnerability |
| Microsoft Scripting Engine | CVE-2019-0812 | Chakra Scripting Engine Memory Corruption Vulnerability |
| Microsoft Scripting Engine | CVE-2019-0829 | Chakra Scripting Engine Memory Corruption Vulnerability |
| Microsoft Windows | CVE-2019-0840 | Windows Kernel Information Disclosure Vulnerability |
| Microsoft Windows | CVE-2019-0838 | Windows Information Disclosure Vulnerability |
| Microsoft Windows | CVE-2019-0796 | Windows Elevation of Privilege Vulnerability |
| Microsoft Windows | CVE-2019-0839 | Windows Information Disclosure Vulnerability |
| Microsoft Windows | CVE-2019-0836 | Windows Elevation of Privilege Vulnerability |
| Microsoft Windows | CVE-2019-0837 | DirectX Information Disclosure Vulnerability |
| Microsoft Windows | CVE-2019-0794 | OLE Automation Remote Code Execution Vulnerability |
| Microsoft Windows | CVE-2019-0814 | Win32k Information Disclosure Vulnerability |
| Microsoft Windows | CVE-2019-0805 | Windows Elevation of Privilege Vulnerability |
| Microsoft Windows | CVE-2019-0848 | Win32k Information Disclosure Vulnerability |
| Microsoft Windows | CVE-2019-0730 | Windows Elevation of Privilege Vulnerability |
| Microsoft Windows | CVE-2019-0688 | Windows TCP/IP Information Disclosure Vulnerability |
| Microsoft Windows | CVE-2019-0845 | Windows IOleCvt Interface Remote Code Execution Vulnerability |
| Microsoft Windows | CVE-2019-0685 | Win32k Elevation of Privilege Vulnerability |
| Microsoft Windows | CVE-2019-0842 | Windows VBScript Engine Remote Code Execution Vulnerability |
| Microsoft Windows | CVE-2019-0841 | Windows Elevation of Privilege Vulnerability |
| Microsoft Windows | CVE-2019-0731 | Windows Elevation of Privilege Vulnerability |
| Microsoft Windows | CVE-2019-0732 | Windows Security Feature Bypass Vulnerability |
| Microsoft XML | CVE-2019-0793 | MS XML Remote Code Execution Vulnerability |
| Microsoft XML | CVE-2019-0791 | MS XML Remote Code Execution Vulnerability |
| Microsoft XML | CVE-2019-0790 | MS XML Remote Code Execution Vulnerability |
| Microsoft XML | CVE-2019-0792 | MS XML Remote Code Execution Vulnerability |
| Microsoft XML | CVE-2019-0795 | MS XML Remote Code Execution Vulnerability |
| Open Source Software | CVE-2019-0876 | Open Enclave SDK Information Disclosure Vulnerability |
| Team Foundation Server | CVE-2019-0870 | Team Foundation Server Cross-site Scripting Vulnerability |
| Team Foundation Server | CVE-2019-0869 | Team Foundation Server HTML Injection Vulnerability |
| Team Foundation Server | CVE-2019-0868 | Team Foundation Server Cross-site Scripting Vulnerability |
| Team Foundation Server | CVE-2019-0874 | Team Foundation Server Cross-site Scripting Vulnerability |
| Team Foundation Server | CVE-2019-0871 | Team Foundation Server Cross-site Scripting Vulnerability |
| Team Foundation Server | CVE-2019-0875 | Azure DevOps Server Elevation of Privilege Vulnerability |
| Team Foundation Server | CVE-2019-0867 | Team Foundation Server Cross-site Scripting Vulnerability |
| Team Foundation Server | CVE-2019-0857 | Team Foundation Server Spoofing Vulnerability |
| Team Foundation Server | CVE-2019-0866 | Team Foundation Server Cross-site Scripting Vulnerability |
| Windows Admin Center | CVE-2019-0813 | Windows Admin Center Elevation of Privilege Vulnerability |
| Windows Kernel | CVE-2019-0856 | Windows Remote Code Execution Vulnerability |
| Windows Kernel | CVE-2019-0859 | Win32k Elevation of Privilege Vulnerability |
| Windows Kernel | CVE-2019-0844 | Windows Kernel Information Disclosure Vulnerability |
| Windows SMB Server | CVE-2019-0786 | SMB Server Elevation of Privilege Vulnerability |
