Microsoft Edge Chakra JIT - ImplicitCallFlags Check Bypass with Intl

Microsoft Edge Chakra JIT - ImplicitCallFlags Check Bypass with Intl / If the Intl object hasn't been initialized, access to any property of it will trigger the initialization process which will run Intl.js. The problem is that it runs Intl.js without caring about the ImplicitCallFlags flag. In t...

Microsoft Edge Chakra JIT - ImplicitCallFlags Check Bypass with Intl Exploit

Exploit for windows platform in category dos / poc / If the Intl object hasn't been initialized, access to any property of it will trigger the initialization process which will run Intl.js. The problem is that it runs Intl.js without caring about the ImplicitCallFlags flag. In the PoC, it redefin...

Microsoft Edge Chakra JIT InlineArrayPush Type Confusion

Microsoft Edge: Chakra: JIT: Type confusion with InlineArrayPush This is similar to issue 1531 . The patch seems to prevent type confusion triggered from StElemIA instructions. But the SetItem method can also be invoked through the Array.prototype.push method which can be inlineed. We can achieve...

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 - 'DictionaryPropertyDescriptor::CopyFrom' Type Confusion

/ Here's the method. template template void DictionaryPropertyDescriptor::CopyFromDictionaryPropertyDescriptor& descriptor this-Attributes = descriptor.Attributes; this-Data = descriptor.Data == DictionaryPropertyDescriptor::NoSlots ? NoSlots : descriptor.Data; this-Getter = descriptor.Getter ==...

Microsoft Edge Chakra JIT - 'InlineArrayPush' Type Confusion

/ This is similar to issue 1531 . The patch seems to prevent type confusion triggered from StElemIA instructions. But the SetItem method can also be invoked through the Array.prototype.push method which can be inlineed. We can achieve type confusion with the push method in the same way used for...

Microsoft Edge Chakra JIT - Parameter Scope Parsing Type Confusion

Microsoft Edge Chakra JIT - Parameter Scope Parsing Type Confusion // PoC: async function triggera = class b await 1 let spray = ; for let i = 0; i 0016 SetHomeObj R13 R14 001b NewScObjectSimple R9 001d ProfiledStFld R9.value = R2 1 0021 ProfiledStFld R9.done = R4 2 0025 Yield R9 R9...

Microsoft Edge Chakra JIT ImplicitCallFlags Check Bypass

Microsoft Edge: Chakra: JIT: ImplicitCallFlags check bypass with Intl CVE-2018-8288 If the Intl object hasn't been initialized, access to any property of it will trigger the initialization process which will run Intl.js. The problem is that it runs Intl.js without caring about the ImplicitCallFla...

Microsoft Edge Chakra JIT - ImplicitCallFlags Check Bypass with Intl

/ If the Intl object hasn't been initialized, access to any property of it will trigger the initialization process which will run Intl.js. The problem is that it runs Intl.js without caring about the ImplicitCallFlags flag. In the PoC, it redefines Map.prototype.get to intercept the execution of...

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 - Out-of-Bounds Reads/Writes Exploit

Exploit for windows platform in category dos / poc / It seems that this issue is similar to the issue 1429 MSRC 42111. It might need to refresh the page several times to observe a crash. PoC: / let arr = new Uint32Array1000; for let i = 0; i 0x1000000; i++ for let j = 0; j 1; j++ i--; i++; arri =...

Microsoft Edge Chakra JIT - Out-of-Bounds ReadsWrites

Microsoft Edge Chakra JIT - Out-of-Bounds ReadsWrites / It seems that this issue is similar to the issue 1429 MSRC 42111. It might need to refresh the page several times to observe a crash. PoC: / let arr = new Uint32Array1000; for let i = 0; i 0x1000000; i++ for let j = 0; j 1; j++ i--; i++; arr...

Microsoft Edge Chakra JIT - BoundFunction::NewInstance Out-of-Bounds Read

/ BoundFunction::NewInstance is used to handle calls to a bound function. The method first allocates a new argument array and copies the prepended arguments and others into the new argument array and calls the actual function. The problem is, it doesn't care about the CallFlagsExtraArg flag which...

Microsoft Edge Chakra JIT - BoundFunction::NewInstance Out-of-Bounds Read

Microsoft Edge Chakra JIT - BoundFunction::NewInstance Out-of-Bounds Read / BoundFunction::NewInstance is used to handle calls to a bound function. The method first allocates a new argument array and copies the prepended arguments and others into the new argument array and calls the actual...

Microsoft Edge Chakra JIT - BoundFunction::NewInstance Out-of-Bounds Read Exploit

Exploit for windows platform in category dos / poc / BoundFunction::NewInstance is used to handle calls to a bound function. The method first allocates a new argument array and copies the prepended arguments and others into the new argument array and calls the actual function. The problem is, it...

Microsoft Edge Chakra JIT - Type Confusion with Hoisted SetConcatStrMultiItemBE Instructions Exploit

Exploit for windows platform in category dos / poc / Here's a PoC: / function optstr for let i = 0; i .var s9.var = LdSlot s32s18l53.var s7.var = LdSlot s20s18l51.var s8.var = LdSlot s19s18l52.var s1Object.var = LdA 0x7FFFF47A0000 GlobalObjectObject.var s2.var = LdCAI4 0 0x0.i32 s3.var = LdCAI4 2...

Microsoft Edge Chakra JIT - Out-of-Bounds Reads/Writes

/ It seems that this issue is similar to the issue 1429 MSRC 42111. It might need to refresh the page several times to observe a crash. PoC: / let arr = new Uint32Array1000; for let i = 0; i 0x1000000; i++ for let j = 0; j 1; j++ i--; i++; arri = 0x1234;...

Microsoft Edge Chakra JIT SetConcatStrMultiItemBE Type Confusion

Microsoft Edge: Chakra: JIT: Type confusion with hoisted SetConcatStrMultiItemBE instructions CVE-2018-8229 Here's a PoC: function optstr for let i = 0; i .var s9.var = LdSlot s32s18l53.var s7.var = LdSlot s20s18l51.var s8.var = LdSlot s19s18l52.var s1Object.var = LdA 0x7FFFF47A0000...

Apple Safari RegExp Exec Type Confusion Remote Code Execution Vulnerability

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Apple Safari. 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 handling of...

Analysis antivirus BitDefender integer overflow vulnerabilities Part II--exploit-vulnerability warning-the black bar safety net

Our last article reviewed from Pagefault submitted content, detailed description of the Bitdefender antivirus product of the integer overflow problem. Although only rely on the content of these is sufficient to the supplier to submit a bug report, but the Pagefault by providing a...