vurbeyond.blogg.se - Evernote web clipper extension

The exploit is triggered by the malicious website and causes Evernote’s internal infrastructure to inject an attacker controlled payload into all iframes contexts.

Malicious website silently loads hidden, legitimate iframe tags (link) of targeted websites.

via social media, email, a compromised blog comment, etc.).

User navigates to the attacker’s malicious website (e.g.

The researchers also provided a description of a Proof-of-Concept (PoC) attacks to steal sensitive data from an unsuspecting user, below the attack scenario:

Researchers published a video PoC of the attacks that shows how hackers can steal a user’s Facebook information and data on PayPal transactions. The vulnerability discovered by the experts in the Evernote extension allows an attacker to inject a malicious payload into all iframe contexts and steal credentials, cookies, and other data. The attack scenario sees hackers tricking victims into visiting specially crafted websites that load hidden iframes. The popular extension has over 4.6 million users. The Evernote Web Clipper extension for Chrome allows users to easily save online content to Evernote, including web pages, articles, images, text, and emails. The vulnerability, tracked as CVE-2019-12592, could be exploited by attackers operating malicious websites to bypass the browser’s same-origin policy (SOP) and execute arbitrary code on the victim’s behalf. “A logical coding error made it is possible to break domain-isolation mechanisms and execute code on behalf of the user – granting access to sensitive user information not limited to Evernote’s domain.” “In May 2019 Guardio’s research team has discovered a critical vulnerability in Evernote Web Clipper for Chrome.” reads a blog post published by Guardio.