From securityweek.com
Cisco’s Talos threat intelligence and research group this week disclosed the details of recently patched vulnerabilities affecting the Chrome and Firefox web browsers.
The Chrome flaw, tracked as CVE-2020-6463 and classified as high severity with a CVSS score of 8.8, was patched by Google in April with the release of Chrome 81.0.4044.122. The tech giant awarded a $5,000 bounty for the bug.
The vulnerability, described as a memory corruption issue, impacts PDFium, the open source PDF renderer used by Chrome and other applications. An attacker could exploit the weakness for remote code execution in the browser by getting the targeted user to open a specially crafted document that contains JavaScript code.
“PDFium supports execution of Javascript scripts embedded inside PDF documents. As Chrome itself, PDFium uses V8 as its Javascript engine. This vulnerability lies in a way V8 in a specific configuration processes regular expressions,” Talos explained.