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Ghostscript 9.26 - Pseudo-Operator Remote Code Execution
I noticed ghostscript 9.26 was released, so had a quick look and spotted some errors. For background, this is how you define a subroutine in postscript:
/hello {
(hello\n) print
} def
That's simple enough, but because a subroutine...
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...
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 opt(o, c, value) {
o.b = 1;
class A...
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...
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...
Microsoft Windows 10 - 'RestrictedErrorInfo' Unmarshal Section Handle Use-After-Free
Windows: RestrictedErrorInfo Unmarshal Section Handle UAF EoP
Platform: Windows 10 1709/1809
Class: Elevation of Privilege
Security Boundary (per Windows Security Service Criteria): User boundary
Summary:
The...
Microsoft Windows 10 - XmlDocument Insecure Sharing Privilege Escalation
Windows: XmlDocument Insecure Sharing Elevation of Privilege
Platform: Windows 10 1809 (almost certainly earlier versions as well).
Class: Elevation of Privilege
Security Boundary (per Windows Security Service Criteria)...