CVE-2019-11708KEV · OVERDUE

Mozilla Firefox and Thunderbird Sandbox Escape Vulnerability

Critical · published July 23, 2019

Patch now

Confirmed exploited, and the score agrees

CVSS calls it critical at 10.0. It is confirmed in active exploitation. It sits in the 99.0th percentile for exploit probability.

1593
days past CISA
deadline
CVSS v3.1
10.0
EPSS
56%
Percentile
99.0
In the wild
Confirmed
What it is

🚨 A compromised child process can steer a non-sandboxed parent process toward perilous web content, leading to potential chaos on your machine! 🔥 Think of it as a mischievous child who tells their unsuspecting parent to follow a shortcut to the amusement park, but it turns out to be a wild goose chase that leads straight into trouble instead! If exploited, this vulnerability could allow an attacker to run arbitrary code on your system, potentially giving them control over your device. Imagine the devastation of an uninvited intruder commandeering your computer while you're blissfully unaware!

Put simply

Think of it as a mischievous child who tells their unsuspecting parent to follow a shortcut to the amusement park, but it turns out to be a wild goose chase that leads straight into trouble instead! This vulnerability arises from the insufficient vetting of parameters that are passed through IPC (Inter-Process Communication) messages between child and parent processes, allowing a compromised child to manipulate the parent process into executing harmful content.

What to do

If exploited, this vulnerability could allow an attacker to run arbitrary code on your system, potentially giving them control over your device. Imagine the devastation of an uninvited intruder commandeering your computer while you're blissfully unaware! To protect yourself, update Firefox and Thunderbird to versions 60.7.2 or later for ESR, and 67.0.4 or later for standard versions. Don’t leave your system vulnerable — ensure you check for any updates immediately! You've got this! With a quick update, you'll be back on track, securing your digital realm in no time! 🛡️

The record
Technical detail
CVSS v3.1
10.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.55874 · 99.0th percentile
Published
2019-07-23T13:20Z
KEV added
2022-05-23 · due 2022-06-13
EPSS history
Timeline
  • 23 MAY 00:00Z
    Added to CISA KEV — remediate by Jun 13
    kev
  • 23 JUL 13:20Z
    Insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent processes can result in the non-sandboxed parent process…
    cvelistv5