WebAssembly is a binary format that allows you to run code from programming languages other than JavaScript on the web efficiently and securely. This way the code can be run while browsing. Basically, it’s the engine that reads JavaScript V8 and translates the JavaScript code directly into machine code so that computers can actually understand it. V8 is Google’s open source JavaScript and WebAssembly engine. The Chrome DevTools are a set of web authoring and debugging tools that web developers can use to iterate, debug and profile their site. Dev ToolsĬhrome DevTools is a set of web developer tools built directly into the Google Chrome browser. When surfing the web in this mode, your browsing history will not be recorded. Incognito mode in Google Chrome – and other browsers-is essentially a setting on your web browser to disallow the storing of local data relating to the websites you surf. After Google acquired it in 2005, Chrome uses Skia for nearly all graphics operations, including text rendering. Skia was developed as an open-source graphics library, written in C++ which abstracts away platform-specific graphics API. If, after freeing a memory location, a program does not clear the pointer to that memory, an attacker can use the error to manipulate the program. Use after free (UAF) is a vulnerability caused by the incorrect use of dynamic memory during a program’s operation. So, by creating a specially crafted input, attackers could use this vulnerability to write code into a memory location where they normally wouldn’t have access.
In software exploit code, two common areas that are targeted for overflows are the stack and the heap. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger a use-after-free error and execute arbitrary code on the target system.Ī buffer overflow is a type of software vulnerability that exists when an area of memory within a software application reaches its address boundary and writes into an adjacent memory region. The vulnerability exists due to a use-after-free error within the V8 component in Google Chrome. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger a heap-based buffer overflow and execute arbitrary code on the target system. The vulnerability exists due to a boundary error when processing untrusted HTML content in PDFium. CVE-2021-37984 (High CVSS 7.7): Heap buffer overflow in PDFium.A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger a use-after-free error and execute arbitrary code on the target system. The vulnerability exists due to a use-after-free error within the Dev Tools component in Google Chrome. CVE-2021-37983 (High CVSS 7.7): Use after free in Dev Tools.
The vulnerability exists due to a use-after-free error within the Incognito component in Google Chrome. CVE-2021-37982 (High CVSS 7.7): Use after free in Incognito.The vulnerability exists due to a boundary error when processing untrusted HTML content in Skia.
This time the update patches 19 vulnerabilities, of which 5 are classified as “high” risk vulnerabilities.
For the third time in a month Google has issued an update to patch for several security issues.