Microsoft Edge Buffer Overflow Vulnerability (CNVD-2019-27382)

Microsoft ChakraCore and Microsoft Edge are both products of Microsoft Corporation.ChakraCore is the core of an open-source Chakra JavaScript scripting engine used in the Edge browser, and is also available as a standalone JavaScript engine. Microsoft Edge is a web browser that comes with Windows...

Microsoft Patch Tuesday — February 2019: Vulnerability disclosures and Snort coverage

Microsoft released its monthly security update today, disclosing a variety of vulnerabilities in several of its products. The latest Patch Tuesday covers 69 vulnerabilities, 20 of which are rated “critical,” 46 that are considered “important” and three that are “moderate.” This release also...

Scripting Engine Information Disclosure Vulnerability

An information disclosure vulnerability exists when Chakra improperly discloses the contents of its memory, which could provide an attacker with information to further compromise the user’s computer or data. To exploit the vulnerability, an attacker must know the memory address of where the objec...

Scripting Engine Elevation of Privileged Vulnerability

A vulnerability exists in Microsoft Chakra JIT server. An attacker who successfully exploited this vulnerability could gain elevated privileges. The vulnerability by itself does not allow arbitrary code to run. However, this vulnerability could be used in conjunction with one or more...

KB4487020: Windows 10 Version 1703 February 2019 Security Update

The remote Windows host is missing security update 4487020. It is, therefore, affected by multiple vulnerabilities : - A remote code execution vulnerability exists in .NET Framework and Visual Studio software when the software fails to check the source markup of a file. An attacker who successful...

Microsoft Chakra JavaScript Loop Type Confusion Vulnerability

This vulnerability allows remote attackers to produce abnormal program execution on vulnerable installations of Microsoft Chakra. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the...

KB4487044: Windows 10 Version 1809 and Windows Server 2019 February 2019 Security Update

The remote Windows host is missing security update 4487044. It is, therefore, affected by multiple vulnerabilities : - A remote code execution vulnerability exists in .NET Framework and Visual Studio software when the software fails to check the source markup of a file. An attacker who successful...

Microsoft Edge Chakra - JsBuiltInEngineInterfaceExtensionObject::InjectJsBuiltInLibraryCode

/ The JsBuiltInEngineInterfaceExtensionObject::InjectJsBuiltInLibraryCode method is used to execute JsBuiltIn.js which initializes some builtin objects. Because it's essentially written in JavaScript, it needs to clear the disable-implicit-call flag before calling the JavaScript code, otherwise i...

Microsoft Edge Chakra - NewScObjectNoCtor or InitProto Type Confusion Exploit

NewScObjectNoCtor and InitProto opcodes are treated as having no side effects, but actually they can have via the SetIsPrototype method of the type handler that can cause transition to a new type. This can lead to type confusion in the JITed code. In the PoC, it overwrites the pointer to property...

Microsoft Edge Chakra - InitClass Type Confusion Exploit

/ Issue description This is similar to issue 1702 https://www.exploit-db.com/exploits/46203 . This time, it uses an InitClass instruction to reach the SetIsPrototype method. PoC: / function opto, c, value o.b = 1; class A extends c o.a = value; function main for let i = 0; i 2000; i++ let o = a: ...

Microsoft Edge Chakra - InlineArrayPush Type Confusion Exploit

/ In Chakra, if you add a numeric property to an object having inlined properties, it will start transition to a new type where the space for some of previously inlined properties become for the pointer to the property slots and the pointer to the object array which stores numeric properties. For...

Microsoft Edge Chakra - InlineArrayPush Type Confusion

Microsoft Edge Chakra - InlineArrayPush Type Confusion / In Chakra, if you add a numeric property to an object having inlined properties, it will start transition to a new type where the space for some of previously inlined properties become for the pointer to the property slots and the pointer t...

Microsoft Edge Chakra - InitClass Type Confusion

Microsoft Edge Chakra - InitClass Type Confusion / Issue description This is similar to issue 1702 https://www.exploit-db.com/exploits/46203 . This time, it uses an InitClass instruction to reach the SetIsPrototype method. PoC: / function opto, c, value o.b = 1; class A extends c o.a = value;...

Microsoft Edge Chakra - 'InitClass' Type Confusion

/ Issue description This is similar to issue 1702 https://www.exploit-db.com/exploits/46203 . This time, it uses an InitClass instruction to reach the SetIsPrototype method. PoC: / function opto, c, value o.b = 1; class A extends c o.a = value; function main for let i = 0; i 2000; i++ let o = a: ...

Microsoft Edge Chakra - JsBuiltInEngineInterfaceExtensionObject::InjectJsBuiltInLibraryCode Use-After-Free

Microsoft Edge Chakra - JsBuiltInEngineInterfaceExtensionObject::InjectJsBuiltInLibraryCode Use-After-Free / The JsBuiltInEngineInterfaceExtensionObject::InjectJsBuiltInLibraryCode method is used to execute JsBuiltIn.js which initializes some builtin objects. Because it's essentially written in...

Microsoft Edge Chakra - NewScObjectNoCtor or InitProto Type Confusion

Microsoft Edge Chakra - NewScObjectNoCtor or InitProto Type Confusion NewScObjectNoCtor and InitProto opcodes are treated as having no side effects, but actually they can have via the SetIsPrototype method of the type handler that can cause transition to a new type. This can lead to type confusio...

Microsoft Edge Chakra - 'InlineArrayPush' Type Confusion

/ In Chakra, if you add a numeric property to an object having inlined properties, it will start transition to a new type where the space for some of previously inlined properties become for the pointer to the property slots and the pointer to the object array which stores numeric properties. For...

Microsoft Edge Chakra - 'JsBuiltInEngineInterfaceExtensionObject::InjectJsBuiltInLibraryCode' Use-After-Free

/ The JsBuiltInEngineInterfaceExtensionObject::InjectJsBuiltInLibraryCode method is used to execute JsBuiltIn.js which initializes some builtin objects. Because it's essentially written in JavaScript, it needs to clear the disable-implicit-call flag before calling the JavaScript code, otherwise i...

Microsoft Edge Chakra - 'NewScObjectNoCtor' or 'InitProto' Type Confusion

NewScObjectNoCtor and InitProto opcodes are treated as having no side effects, but actually they can have via the SetIsPrototype method of the type handler that can cause transition to a new type. This can lead to type confusion in the JITed code. In the PoC, it overwrites the pointer to property...

Microsoft Edge Chakra JIT NewScObjectNoCtor / InitProto Type Confusion

Microsoft Edge: Chakra: JIT: Type confusion via NewScObjectNoCtor or InitProto CVE-2019-0567 NewScObjectNoCtor and InitProto opcodes are treated as having no side effects, but actually they can have via the SetIsPrototype method of the type handler that can cause transition to a new type. This ca...