CVE-2018-6152

The implementation of the Page.downloadBehavior backend unconditionally marked downloaded files as safe, regardless of file type in Google Chrome prior to…

published December 4, 2018

CVSS
—
EPSS
1%
Percentile
70.5
In the wild
Unconfirmed
What it is

⚠️ A malicious extension could exploit this sneaky flaw in Chrome's file handling! Users may unknowingly mark dangerous files as safe, putting their systems at risk. 🔥 Think of it like a restaurant that accepts any dish, regardless of ingredients. If a crafty chef slips in a dangerous meal labeled ‘safe,’ diners have no idea they’re about to bite into something harmful! An attacker could leverage this oversight to perform a sandbox escape, potentially gaining unauthorized access to the user's system. The consequences could be widespread, leading to data theft or more severe security breaches, all starting from a seemingly innocent file download.

Put simply

Think of it like a restaurant that accepts any dish, regardless of ingredients. If a crafty chef slips in a dangerous meal labeled ‘safe,’ diners have no idea they’re about to bite into something harmful! The flaw in Chrome’s downloadBehavior backend allowed any downloaded file to be marked as safe, regardless of its actual content. This loophole could be exploited through malicious HTML pages that trick users into interacting with harmful files, ultimately breaking the browser's security model.

What to do

An attacker could leverage this oversight to perform a sandbox escape, potentially gaining unauthorized access to the user's system. The consequences could be widespread, leading to data theft or more severe security breaches, all starting from a seemingly innocent file download. Users should immediately update Google Chrome to version 66.0.3359.117 or later to ensure this vulnerability is patched. Additionally, exercise caution when installing extensions and regularly review permissions and activities of installed extensions. You've got this! Stay vigilant and keep your browser updated for a safer browsing experience! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01315 · 70.5th percentile
Published
2018-12-04T17:00Z
EPSS history
Timeline
  • 04 DEC 17:00Z
    The implementation of the Page.downloadBehavior backend unconditionally marked downloaded files as safe, regardless of file type in Google Chrome prior to…
    cvelistv5