CVE-2014-0322KEV · OVERDUE

Microsoft Internet Explorer Use-After-Free Vulnerability

High · published February 14, 2014

Patch now

Confirmed exploited, and the score agrees

CVSS calls it high at 8.8. It is confirmed in active exploitation. It sits in the 99.7th percentile for exploit probability.

1612
days past CISA
deadline
CVSS v3.1
8.8
EPSS
85%
Percentile
99.7
In the wild
Confirmed
What it is

🚨 A sneaky use-after-free vulnerability lurks in Microsoft Internet Explorer 9 and 10, and it's ripe for exploitation! 🎯 Think of it like a restaurant serving a dish that uses an ingredient that was thrown out last week — it’s still on the menu, but it can lead to a nasty surprise for anyone who orders it. This flaw allows attackers to execute arbitrary code like an underqualified chef trying to whip up a dangerous new recipe! An attacker can unleash a world of chaos with this exploit, potentially gaining full control over a system. They could steal sensitive data, install malicious software, or even establish a permanent foothold in vulnerable systems — absolutely devastating!

Put simply

Think of it like a restaurant serving a dish that uses an ingredient that was thrown out last week — it’s still on the menu, but it can lead to a nasty surprise for anyone who orders it. This flaw allows attackers to execute arbitrary code like an underqualified chef trying to whip up a dangerous new recipe! This use-after-free vulnerability in Internet Explorer occurs when the browser mishandles memory related to crafted JavaScript code, particularly through the onpropertychange attribute of a script element. Attackers can manipulate this flaw to execute their own code remotely.

What to do

An attacker can unleash a world of chaos with this exploit, potentially gaining full control over a system. They could steal sensitive data, install malicious software, or even establish a permanent foothold in vulnerable systems — absolutely devastating! Immediate action is crucial! Users should upgrade to the latest supported version of Internet Explorer and apply all security patches released by Microsoft. Regularly updating your browser is your best defense against these threats. You've got this! Follow these steps, and you'll be a security hero in no time! 🦸‍♂️

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.85122 · 99.7th percentile
Published
2014-02-14T16:00Z
KEV added
2022-05-04 · due 2022-05-25
EPSS history
Timeline
  • 04 MAY 00:00Z
    Added to CISA KEV — remediate by May 25
    kev
  • 14 FEB 16:00Z
    Use-after-free vulnerability in Microsoft Internet Explorer 9 and 10 allows remote attackers to execute arbitrary code via vectors involving crafted JavaScript…
    cvelistv5