Google Chrome SimplfiedLowering Integer Overflow

This module requires Metasploit: https://metasploit.com/download Current source: https://github.com/rapid7/metasploit-framework class MetasploitModule 'Google Chrome versions before 87.0.4280.88 integer overflow during SimplfiedLowering phase', 'Description' = %q This module exploits an issue in...

Google Chrome versions before 87.0.4280.88 integer overflow during SimplfiedLowering phase

This module exploits an issue in Google Chrome versions before 87.0.4280.88 64 bit. The exploit makes use of an integer overflow in the SimplifiedLowering phase in turbofan. It is used along with a type hardening bypass using ArrayPrototypeShift to create a JSArray with a length of -1. This is...

Chrome V8 Turbofan Type Confusion

V8: Turbofan fails to deoptimize code after map deprecation, leading to type confusion NOTE: We have evidence that the following bug is being used in the wild. Therefore, this bug is subject to a 7 day disclosure deadline. VULNERABILITY DETAILS When turbofan compiles code that performs a Map...

Chrome NewFixedArray Missing Array Size Check

Chrome: Missing array size check in NewFixedArray VULNERABILITY DETAILS V8 caps the number of elements a fixed array can contain1. Most of the code that needs to create or resize a fast JS array i.e. one that's backed by a fixed array rather than a dictionary ends up calling either the regular C+...

Google Chrome 72 / 73 Array.map Corruption

This module requires Metasploit: https://metasploit.com/download Current source: https://github.com/rapid7/metasploit-framework class MetasploitModule 'Google Chrome 72 and 73 Array.map exploit', 'Description' = %q This module exploits an issue in Chrome 73.0.3683.86 64 bit. The exploit corrupts...

JavaScript V8 Turbofan Out-Of-Bounds Read Exploit

V8: Turbofan may read a Map pointer out-of-bounds when optimizing Reflect.construct The following JavaScript program found through fuzzing triggers an assertion failure in debug builds of the latest v8 and the current release branch, 7.2.502.28: function farg const o =...

Google Chrome V8 - Turbofan JSCallReducer::ReduceArrayIndexOfIncludes Out-of-Bounds Read/Write

!-- Since commit https://chromium.googlesource.com/v8/v8.git/+/c22bb466d8934685d897708119543d099b9d2a9a turbofan supports inlining calls to array.includes and array.indexOf. The logic of the function is roughly: 1. Check the set of possible Maps of the array type with...

Google Chrome V8 - Turbofan JSCallReducer::ReduceArrayIndexOfIncludes Out-of-Bounds ReadWrite

Google Chrome V8 - Turbofan JSCallReducer::ReduceArrayIndexOfIncludes Out-of-Bounds ReadWrite !-- Since commit https://chromium.googlesource.com/v8/v8.git/+/c22bb466d8934685d897708119543d099b9d2a9a turbofan supports inlining calls to array.includes and array.indexOf. The logic of the function is...

Google Chrome V8 - Turbofan JSCallReducer::ReduceArrayIndexOfIncludes Out-of-Bounds Read/Write

!-- Since commit https://chromium.googlesource.com/v8/v8.git/+/c22bb466d8934685d897708119543d099b9d2a9a turbofan supports inlining calls to array.includes and array.indexOf. The logic of the function is roughly: 1. Check the set of possible Maps of the array type with...

Trashing the Flow of Data

Posted by Stephen Röttger In this blog post I want to present crbug.com/944062, a vulnerability in Chrome’s JavaScript compiler TurboFan that was discovered independently by Samuel saelo@ via fuzzing with fuzzilli, and by myself via manual code auditing. The bug was found in beta and was fixed...

Chrome V8 Turbofan JSCallReducer::ReduceArrayIndexOfIncludes Failed Check

v8: turbofan: JSCallReducer::ReduceArrayIndexOfIncludes fails to insert Map checks Since commit https://chromium.googlesource.com/v8/v8.git/+/c22bb466d8934685d897708119543d099b9d2a9a turbofan supports inlining calls to array.includes and array.indexOf. The logic of the function is roughly: 1. Che...

Grasp the window of opportunity: see how do I get Chrome 1-day vulnerabilities and achieve the use-vulnerability warning-the black bar safety net

Overview For Chrome to say, when the discovery of a vulnerability, the first in the v8 source tree to be repaired, and then re-release a new stable version of Chrome, and in both during the process, the attacker can completely for a particular vulnerability, the development of a usable exploit...