📄 Microsoft Windows 11 Build 10.0.27898.1000 Insider Preview Privilege Escalation

A security vulnerability exists in the Windows Administrator Protection feature in Windows 11 Insider Preview that allows a low-privileged user to achieve privilege escalation. The vulnerability is located in the AiRegistrySync function within the appinfo service, which incorrectly copies registr...

Microsoft Adds Default Protection Against RDP Brute-Force Attacks in Windows 11

Microsoft is now taking steps to prevent Remote Desktop Protocol RDP brute-force attacks as part of the latest builds for the Windows 11 operating system in an attempt to raise the security baseline to meet the evolving threat landscape. To that end, the default policy for Windows 11 builds –...

Microsoft Revamps Windows Insider Preview Bug Bounty Program

Microsoft has revamped its Windows Insider Preview bug bounty program with higher rewards and an improved portal for bounty hunters to report flaws, in an effort to help sniff out more vulnerabilities on its platform. The Microsoft Windows Insider Preview bounty program is part of the Microsoft...

Updates to the Windows Insider Preview Bounty Program

Partnering with the research community is an important part of Microsoft’s holistic approach to defending against security threats. Bounty programs are one part of this partnership, designed to encourage and reward vulnerability research focused on the highest impact to customer security. The...

Windows 10 Insider Preview Build 19041.264

Windows 10 Insider Preview Build 19041.264 Summary This is a package for a Windows Insider Preview build. For more information, please see the blog post Releasing Windows 10 Insider Preview Build 19041.264 to the Slow & Release Preview rings. How to get this update Before installing this update...

Servicing stack update for Windows 10 Insider Preview released to the Slow & Release Preview rings

Servicing stack update for Windows 10 Insider Preview released to the Slow & Release Preview rings Summary This is a Servicing stack updates SSU package for a Windows Insider Preview build. For more infomration, please see the blog post Releasing Windows 10 Insider Preview Build 19041.264 to the...

Windows 10 Insider Preview Fast win32kbase HMMarkObjectDestroy Arbitrary Code Execution Vulnerability Regression

Summary A use after free vulnerability exists in Windows 10, Insider Preview Fast 10.0.19582.1001, when a Win32k component fails to properly handle objects in memory. Successful exploitation of this vulnerability can lead to arbitrary code execution in the kernel context and elevation of...

Microsoft Windows 10 Kernel SetMapMode MM_HIENGLISH information disclosure vulnerability

Summary An exploitable information disclosure vulnerability exists in the kernel of Microsoft Windows 10 Insider Preview Fast and Stable. A specially crafted executable can cause an out-of-bounds read, resulting in information disclosure. To trigger this vulnerability, the attacker needs to execu...

Windows 10 win32kbase HMMarkObjectDestroy Arbitrary Code Execution Vulnerability

Summary A use after free vulnerability exists in Windows 10, Version 10.0.19033.1, when a Win32k component fails to properly handle objects in memory. Successful exploitation of this vulnerability can lead to arbitrary code execution in the kernel context and elevation of privileges. This...

Microsoft Edge Chakra JIT - InitializeNumberFormat and InitializeDateTimeFormat Type Confusion

/ The InitializeNumberFormat function in Intl.js is used to initialize an Intl.NumberFormat object, and InitializeDateTimeFormat is used for an Intl.DateTimeFormat object. There are two versions of each initializer. One is for WinGlob and the other is for ICU. The problem is that the versions for...

Microsoft Edge Chakra JIT - InitializeNumberFormat and InitializeDateTimeFormat Type Confusion Explo

Exploit for windows platform in category dos / poc / The InitializeNumberFormat function in Intl.js is used to initialize an Intl.NumberFormat object, and InitializeDateTimeFormat is used for an Intl.DateTimeFormat object. There are two versions of each initializer. One is for WinGlob and the oth...

Microsoft Edge Chakra JIT - InitializeNumberFormat and InitializeDateTimeFormat Type Confusion

Microsoft Edge Chakra JIT - InitializeNumberFormat and InitializeDateTimeFormat Type Confusion / The InitializeNumberFormat function in Intl.js is used to initialize an Intl.NumberFormat object, and InitializeDateTimeFormat is used for an Intl.DateTimeFormat object. There are two versions of each...

Microsoft Edge 40.15063.0.0 Chakra - Incorrect JIT Optimization with TypedArray Setter #3

'use strict'; function funca, b, c a0 = 1.2; b0 = c; a1 = 2.2; a0 = 2.3023e-320; function main let a = 1.1, 2.2; let b = new Uint32Array100; for let i = 0; i a0 = ; return 0; ; a0.toString; main; // Tested on Microsoft Edge 40.15063.0.0Insider Preview...

Microsoft Edge: Chakra: incorrect jit optimization with TypedArray setter #3(CVE-2017-8601)

Coincidentally, Microsoft released the patch for the issue 1290 the day after I reported it. But it seems they fixed it incorrectly again. This time, "funca, b, i;" is replaced with "funca, b, ;". PoC: 'use strict'; function funca, b, c a0 = 1.2; b0 = c; a1 = 2.2; a0 = 2.3023e-320; function main...

Announcing the Windows Bounty Program

Windows 10 represents the best and newest in our strong commitment to security with world-class mitigations. One of Microsoft’s longstanding strategies toward improving software security involves investing in defensive technologies that make it difficult and costly for attackers to find, exploit...

Microsoft Extends Edge Bug Bounty Program Indefinitely

Microsoft said Wednesday it would no longer impose a time limit for its Edge bug bounty program. The Redmond, Wash. based company announced the Edge on Windows Insider Preview WIP program in August 2016 as a means to incentivize researchers to find and report vulnerabilities in the browser...

Extending the Microsoft Edge Bounty Program

Over the past ten months we have paid out over $200,000 USD in bounties. This collaboration with the research community has resulted in significant improvements in Edge security and has allowed us to offer more proactive security for our customers. Keeping in line with our philosophy of protectin...

Extending the Microsoft Edge Bounty Program

Over the past ten months we have paid out over $200,000 USD in bounties. This collaboration with the research community has resulted in significant improvements in Edge security and has allowed us to offer more proactive security for our customers. Keeping in line with our philosophy of protectin...

Extending Microsoft Edge Bounty Program

Over the past 10 months, we’ve paid out more than $200,000 USD in bounties to researchers reporting vulnerabilities through the Microsoft Edge Bounty Program. Partnering with the research community has helped improve Microsoft Edge security, and to continue this collaboration, today were extendin...

Extending Microsoft Edge Bounty Program

Over the past 10 months, we’ve paid out more than $200,000 USD in bounties to researchers reporting vulnerabilities through the Microsoft Edge Bounty Program. Partnering with the research community has helped improve Microsoft Edge security, and to continue this collaboration, today we're extendi...