Remote Code Execution (RCE)

ChakraCore is vulnerable to remote code execution RCE. The vulnerability exists through a JIT type confusion issue that allows RCE attacks...

Updated firefox packages fix security vulnerability

Incorrect alias information in IonMonkey JIT compiler for Array.prototype.slice method may lead to missing bounds check and a buffer overflow CVE-2019-9810. Incorrect handling of proto mutations may lead to type confusion in IonMonkey JIT code and can be leveraged for arbitrary memory read and...

MGASA-2019-0131 Updated firefox packages fix security vulnerability

Incorrect alias information in IonMonkey JIT compiler for Array.prototype.slice method may lead to missing bounds check and a buffer overflow CVE-2019-9810. Incorrect handling of proto mutations may lead to type confusion in IonMonkey JIT code and can be leveraged for arbitrary memory read and...

The vulnerability of the Array.prototype.slice method in JIT-compiler IonMonkey of the Firefox ESR browser allows an attacker to compromise the confidentiality, integrity, and accessibility of protected information.

The vulnerability of the Array.prototype.slice method in JIT-compiled Firefox ESR browser software arises due to buffer overflow. Exploiting this vulnerability can allow an attacker to compromise the confidentiality, integrity, and accessibility of protected information...

The vulnerability of the __proto__ mutation function in the JIT-compiler of the Firefox ESR browser allows attackers to compromise the confidentiality, integrity, and accessibility of protected information.

The vulnerability of the proto mutation function in the JIT-compiler of the Firefox ESR browser is related to type confusion errors. Exploiting this vulnerability allows an attacker to compromise the confidentiality, integrity, and accessibility of the protected information...

SpiderMonkey - IonMonkey Compiled Code Fails to Update Inferred Property Types (Type Confusion)

SpiderMonkey - IonMonkey Compiled Code Fails to Update Inferred Property Types Type Confusion A bug in IonMonkey leaves type inference information inconsistent, which in turn allows the compilation of JITed functions that cause type confusions between arbitrary objects. Prerequisites In...

WebKit JavaScriptCore - Out-Of-Bounds Access in FTL JIT due to LICM Moving Array Access Before the Bounds Check

WebKit JavaScriptCore - Out-Of-Bounds Access in FTL JIT due to LICM Moving Array Access Before the Bounds Check / While fuzzing JavaScriptCore, I encountered the following JavaScript program which crashes jsc in current HEAD and release...

SpiderMonkey - IonMonkey Compiled Code Fails to Update Inferred Property Types (Type Confusion)

A bug in IonMonkey leaves type inference information inconsistent, which in turn allows the compilation of JITed functions that cause type confusions between arbitrary objects. Prerequisites In Spidermonkey, every JavaScript objects is an instance of the JSObject class 1. Plain JavaScript objects...

WebKit JavaScriptCore - createRegExpMatchesArray Type Confusion

WebKit JavaScriptCore - createRegExpMatchesArray Type Confusion / Prerequisites ------------- In JavaScriptCore, JSObjects have an associated Structure: an object describing various aspects of the JSObject such as its type, its properties, and the type of elements being stored e.g. unboxed double...

SpiderMonkey - IonMonkey Compiled Code Fails to Update Inferred Property Types (Type Confusion)

SpiderMonkey - IonMonkey Compiled Code Fails to Update Inferred Property Types Type Confusion A bug in IonMonkey leaves type inference information inconsistent, which in turn allows the compilation of JITed functions that cause type confusions between arbitrary objects. Prerequisites In...

WebKit JavaScriptCore - Out-Of-Bounds Access in FTL JIT due to LICM Moving Array Access Before the Bounds Check

/ While fuzzing JavaScriptCore, I encountered the following JavaScript program which crashes jsc in current HEAD and release /System/Library/Frameworks/JavaScriptCore.framework/Resources/jsc on macOS: / // Run with --thresholdForFTLOptimizeAfterWarmUp=1000 // First array probably required to avoi...

Mozilla Firefox IonMonkey JIT Compiler Buffer Overflow (CVE-2019-9810)

A buffer overflow vulnerability exists in Mozilla Firefox IonMonkey JIT Compiler. Successful exploitation of this vulnerability could allow a remote attacker to execute arbitrary code on the affected system or cause application crashes...

WebKit JavaScriptCore - Out-Of-Bounds Access in FTL JIT due to LICM Moving Array Access Exploit

WebKit JavaScriptCore - Out-Of-Bounds Access in FTL JIT due to LICM Moving Array Access Before the Bounds Check / While fuzzing JavaScriptCore, I encountered the following JavaScript program which crashes jsc in current HEAD and release...

WebKit JavaScriptCore - CodeBlock Dangling Watchpoints Use-After-Free

/ While fuzzing JavaScriptCore, I encountered the following simplified and commented JavaScript program which crashes jsc from current HEAD and release: / function v9 // Some watchpoint on the LexicalEnvironment is triggered here // during the 2nd invocation which jettisons the CodeBlock for v9. ...

SpiderMonkey IonMonkey Type Confusion

SpiderMonkey: IonMonkey compiled code fails to update inferred property types, leading to type confusions Related CVE Numbers: CVE-2019-9813 A bug in IonMonkey leaves type inference information inconsistent, which in turn allows the compilation of JITed functions that cause type confusions betwee...

Mozilla Thunderbird < 60.6

The version of Thunderbird installed on the remote Windows host is prior to 60.6. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2019-11 advisory. - A use-after-free vulnerability can occur when the SMIL animation controller incorrectly registers with the refresh...

Mozilla: Type-confusion in IonMonkey JIT compiler

A vulnerability where type-confusion in the IonMonkey just-in-time JIT compiler could potentially be used by malicious JavaScript to trigger a potentially exploitable crash. This vulnerability affects Thunderbird 60.6, Firefox ESR 60.6, and Firefox 66...

Mozilla: IonMonkey leaks JS_OPTIMIZED_OUT magic value to script

The IonMonkey just-in-time JIT compiler can leak an internal JSOPTIMIZEDOUT magic value to the running script during a bailout. This magic value can then be used by JavaScript to achieve memory corruption, which results in a potentially exploitable crash. This vulnerability affects Thunderbird...

SpiderMonkey IonMonkey Type Confusion

Spidermonkey: IonMonkey's type inference is incorrect for constructors entered via OSR Related CVE Numbers: CVE-2019-9791. A bug in IonMonkeys type inference system when JIT compiling and entering a constructor function via on-stack replacement OSR allows the compilation of JITed functions that...

Spidermonkey - IonMonkey Type Inference is Incorrect for Constructors Entered via OSR

/ Spidermonkey - IonMonkey Type Inference is Incorrect for Constructors Entered via OSR A bug in IonMonkeys type inference system when JIT compiling and entering a constructor function via on-stack replacement OSR allows the compilation of JITed functions that cause type confusions between...