JavaScriptCore GetterSetter Type Confusion

JSC: GetterSetter type confusion during DFG compilation The following JavaScript program, found by Fuzzilli and slightly modified, crashes JavaScriptCore built from HEAD and the current stable release /System/Library/Frameworks/JavaScriptCore.framework/Resources/jsc: let notAGetterSetter =...

CVE-2018-12549

In Eclipse OpenJ9 version 0.11.0, the OpenJ9 JIT compiler may incorrectly omit a null check on the receiver object of an Unsafe call when accelerating it...

CVE-2018-12387

A vulnerability where the JavaScript JIT compiler inlines Array.prototype.push with multiple arguments that results in the stack pointer being off by 8 bytes after a bailout. This leaks a memory address to the calling function which can be used as part of an exploit inside the sandboxed content...

The vulnerability affects the implementation of the `Array.prototype.push` method in JIT-compilers of Firefox and Firefox ESR web browsers, allowing an attacker to execute arbitrary code.

The vulnerability of the Array.prototype.push method in JIT-compilers of Firefox and Firefox ESR browsers is related to insufficient validation of input data. Exploiting this vulnerability allows an attacker to execute arbitrary code remotely...

In-depth exploration found in the wild iOS exploit chain VI-vulnerability warning-the black bar safety net

In this article, we will Analysis on your iOS device to get the normal permissions of the shell of the WebKit exploit method, where all the vulnerabilities are available on iOS's sandboxed renderer process WebContent implemented shellcode code execution. Although on iOS Chrome will also be affect...

Webkit JSC JIT ArgumentsEliminationPhase::transform Uninitialized Variable Access

https://github.com/WebKit/webkit/blob/94e868c940d46c5745869192d07255331d00102b/Source/JavaScriptCore/dfg/DFGArgumentsEliminationPhase.cppL743 case GetByVal: ... unsigned numberOfArgumentsToSkip = 0; if candidate-op == PhantomCreateRest numberOfArgumentsToSkip = candidate-numberOfArgumentsToSkip;...

Webkit JSC: JIT - Uninitialized Variable Access in ArgumentsEliminationPhase::transform Exploit

https://github.com/WebKit/webkit/blob/94e868c940d46c5745869192d07255331d00102b/Source/JavaScriptCore/dfg/DFGArgumentsEliminationPhase.cppL743 case GetByVal: ... unsigned numberOfArgumentsToSkip = 0; if candidate-op == PhantomCreateRest numberOfArgumentsToSkip = candidate-numberOfArgumentsToSkip;...

JSC Exploits

Posted by Samuel Groß, Project Zero In this post, we will take a look at the WebKit exploits used to gain an initial foothold onto the iOS device and stage the privilege escalation exploits. All exploits here achieve shellcode execution inside the sandboxed renderer process WebContent on iOS...

Webkit JSC: JIT - Uninitialized Variable Access in ArgumentsEliminationPhase::transform

Webkit JSC: JIT - Uninitialized Variable Access in ArgumentsEliminationPhase::transform https://github.com/WebKit/webkit/blob/94e868c940d46c5745869192d07255331d00102b/Source/JavaScriptCore/dfg/DFGArgumentsEliminationPhase.cppL743 case GetByVal: ... unsigned numberOfArgumentsToSkip = 0; if...

Webkit JSC: JIT - Uninitialized Variable Access in ArgumentsEliminationPhase::transform

https://github.com/WebKit/webkit/blob/94e868c940d46c5745869192d07255331d00102b/Source/JavaScriptCore/dfg/DFGArgumentsEliminationPhase.cppL743 case GetByVal: ... unsigned numberOfArgumentsToSkip = 0; if candidate-op == PhantomCreateRest numberOfArgumentsToSkip = candidate-numberOfArgumentsToSkip;...

Microsoft Windows jscript9 RegExp.input Type Confusion Remote Code Execution Vulnerability

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft Windows. 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 way the JIT...

Remote Code Execution (RCE)

microsoft.chakracore is vulnerable to remote code execution RCE. The vulnerability exists due to a JIT type confusion...

Remote Code Execution (RCE)

microsoft.chakracore is vulnerable to remote code execution RCE. The vulnerability exists through a JIT type confusion in lib/Backend/GlobOpt.cpp...

Remote Code Execution (RCE)

microsoft chakracore is vulnerable to remote code execution. The vulnerability exists through a JIT type confusion attack in lib/Backend/GlobOptIntBounds.cpp...

NewStart CGSL MAIN 4.05 : firefox Multiple Vulnerabilities (NS-SA-2019-0153)

The remote NewStart CGSL host, running version MAIN 4.05, has firefox packages installed that are affected by multiple vulnerabilities: - Incorrect convexity calculations in Skia in Google Chrome prior to 72.0.3626.81 allowed a remote attacker to perform an out of bounds memory write via a crafte...

NewStart CGSL MAIN 4.06 : firefox Multiple Vulnerabilities (NS-SA-2019-0095)

The remote NewStart CGSL host, running version MAIN 4.06, has firefox packages installed that are affected by multiple vulnerabilities: - Incorrect alias information in IonMonkey JIT compiler for Array.prototype.slice method may lead to missing bounds check and a buffer overflow. This vulnerabili...

NewStart CGSL CORE 5.04 / MAIN 5.04 : firefox Multiple Vulnerabilities (NS-SA-2019-0064)

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has firefox packages installed that are affected by multiple vulnerabilities: - The type inference system allows the compilation of functions that can cause type confusions between arbitrary objects when compiled through the...

NewStart CGSL MAIN 4.06 : firefox Multiple Vulnerabilities (NS-SA-2019-0090)

The remote NewStart CGSL host, running version MAIN 4.06, has firefox packages installed that are affected by multiple vulnerabilities: - A use-after-free vulnerability can occur while parsing an HTML5 stream in concert with custom HTML elements. This results in the stream parser object being fre...

NewStart CGSL CORE 5.04 / MAIN 5.04 : thunderbird Multiple Vulnerabilities (NS-SA-2019-0062)

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has thunderbird packages installed that are affected by multiple vulnerabilities: - Incorrect convexity calculations in Skia in Google Chrome prior to 72.0.3626.81 allowed a remote attacker to perform an out of bounds memory...

macOS iOS JavaScriptCore - JSValue Use-After-Free in ValueProfiles

macOS iOS JavaScriptCore - JSValue Use-After-Free in ValueProfiles While fuzzing JSC, I encountered the following JS program which crashes JSC from current HEAD and release /System/Library/Frameworks/JavaScriptCore.framework/Resources/jsc: // Run with --useConcurrentJIT=false...