Microsoft Releases Patches for 60 Flaws—Two Under Active Attack

Get your update caps on. Just a few minutes ago Microsoft released its latest monthly Patch Tuesday update for August 2018, patching a total of 60 vulnerabilities, of which 19 are rated as critical. The updates patch flaws in Microsoft Windows, Edge Browser, Internet Explorer, Office, ChakraCore,...

Microsoft Tuesday August 2018

Microsoft released its monthly set of security advisories today for vulnerabilities that have been identified and addressed in various products. This month's advisory release addresses 62 new vulnerabilities, 20 of which are rated “critical,” 38 that are rated “important,” one that is rated...

Chakra Scripting Engine Memory Corruption Vulnerability

A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge HTML-based. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who...

Chakra Scripting Engine Memory Corruption Vulnerability

A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge HTML-based. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who...

PT-2018-1472 · Microsoft · Chakracore +2

Name of the Vulnerable Software and Affected Versions: Microsoft Edge and Internet Explorer affected versions not specified Description: The issue is caused by a buffer overflow in the ChakraCore JavaScript engine, allowing a remote attacker to execute arbitrary code with the help of a specially...

Microsoft Chakra Floating Point Array Type Confusion Remote Code Execution Vulnerability

This vulnerability allows remote attackers to execute arbitrary code 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 handling of...

Microsoft Edge Chakra Scripting Engine Memory Corruption (CVE-2018-8266)

A memory corruption vulnerability exists in Microsoft Edge. Successful exploitation of this vulnerability could allow a remote attacker to execute arbitrary code on the affected system...

Microsoft Edge Chakra Scripting Engine Memory Corruption (CVE-2018-8355)

A memory corruption vulnerability exists in Microsoft Edge. Successful exploitation of this vulnerability could allow a remote attacker to execute arbitrary code on the affected system...

KB4343892: Windows 10 August 2018 Security Update (Foreshadow)

The remote Windows host is missing security update 4343892. It is, therefore, affected by multiple vulnerabilities : - A remote code execution vulnerability exists in the way that Microsoft browsers access objects in memory. The vulnerability could corrupt memory in a way that could allow an...

chakra: Crash in bool TTD::MarkTable::MarkAndTestAddr<

Project: https://github.com/Microsoft/ChakraCore.git Detailed report: https://oss-fuzz.com/testcase?key=5714440556118016 Project: chakra Fuzzer: jsfuzzer Job Type: asanchakra Platform Id: linux Crash Type: UNKNOWN READ Crash Address: 0x556b0f9f8970 Crash State: bool TTD::MarkTable::MarkAndTestAdd...

chakra: Global-buffer-overflow in ThreadContext::FindPropertyRecord

Project: https://github.com/Microsoft/ChakraCore.git Detailed report: https://oss-fuzz.com/testcase?key=5969175091609600 Project: chakra Fuzzer: jsfuzzer Job Type: asanchakra Platform Id: linux Crash Type: Global-buffer-overflow READ 8 Crash Address: 0x562fc67cdc80 Crash State:...

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 Bug

Microsoft Edge: Chakra: A bug in BoundFunction::NewInstance CVE-2018-8139 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...

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 - 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 - 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 - 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 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...