CVE-2021-21121

Use after free in Omnibox in Google Chrome on Linux prior to 88.0.4324.96 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML…

published February 9, 2021

CVSS
—
EPSS
6%
Percentile
93.5
In the wild
Unconfirmed
What it is

⚠️ A crafty crafted HTML page can lead to a potential sandbox escape in Google Chrome on Linux before version 88.0.4324.96! Think of it as a magician pulling a rabbit out of a hat – the rabbit should stay safely in the hat, but this trick lets it jump out and run amok. When a web page misbehaves, it can slip past the protective walls meant to keep it contained. If successfully exploited, an attacker could break out of the browser's sandbox, gaining unauthorized access to sensitive data or executing malicious actions on the user's system. It’s like giving a backdoor key to a magician who wasn’t supposed to have one! Yikes!

Put simply

Think of it as a magician pulling a rabbit out of a hat – the rabbit should stay safely in the hat, but this trick lets it jump out and run amok. When a web page misbehaves, it can slip past the protective walls meant to keep it contained. This vulnerability arises from a use-after-free error in the Omnibox, meaning the program is trying to use memory that has already been freed, which can lead to unpredictable behavior or security issues when handled improperly.

What to do

If successfully exploited, an attacker could break out of the browser's sandbox, gaining unauthorized access to sensitive data or executing malicious actions on the user's system. It’s like giving a backdoor key to a magician who wasn’t supposed to have one! Yikes! Update Google Chrome to version 88.0.4324.96 or later immediately. Regularly check for updates and enable automatic updates to ensure you are always running the latest and safest version. 🛡️ You've got this! Stay vigilant and keep your browser updated for maximum security! 🚀

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.06190 · 93.5th percentile
Published
2021-02-09T13:55Z
EPSS history
Timeline
  • 09 FEB 13:55Z
    Use after free in Omnibox in Google Chrome on Linux prior to 88.0.4324.96 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML…
    cvelistv5