CVE-2012-4215

Use-after-free vulnerability in the nsPlaintextEditor::FireClipboardEvent function in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird…

published November 21, 2012

CVSS
—
EPSS
6%
Percentile
93.3
In the wild
Unconfirmed
What it is

⚠️ A use-after-free vulnerability in Mozilla Firefox and related applications can let attackers execute arbitrary code with a crafty trick! 🚨 Think of it like an errant waiter who accidentally serves someone else’s meal after you’ve already finished eating — they can mess up the order and cause chaos in the kitchen! An attacker could exploit this flaw to corrupt memory and possibly take control of the affected application, leading to anything from system crashes to malicious code execution. While the severity isn’t rated as critical, the potential for unintended consequences certainly isn't to be ignored!

Put simply

Think of it like an errant waiter who accidentally serves someone else’s meal after you’ve already finished eating — they can mess up the order and cause chaos in the kitchen! This use-after-free vulnerability occurs in the nsPlaintextEditor::FireClipboardEvent function, allowing attackers to gain unauthorized access or disrupt service by exploiting improper memory management.

What to do

An attacker could exploit this flaw to corrupt memory and possibly take control of the affected application, leading to anything from system crashes to malicious code execution. While the severity isn’t rated as critical, the potential for unintended consequences certainly isn't to be ignored! Update Mozilla Firefox, Thunderbird, and SeaMonkey to the latest versions (17.0 and above for Firefox and Thunderbird; 2.14 for SeaMonkey) as soon as possible to eliminate this vulnerability. Regularly review and apply security patches to keep your applications safe! You've got this! By taking these steps, you'll be a security hero in no time! 🦸‍♂️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.06074 · 93.3th percentile
Published
2012-11-21T11:00Z
EPSS history
Timeline
  • 21 NOV 11:00Z
    Use-after-free vulnerability in the nsPlaintextEditor::FireClipboardEvent function in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird…
    cvelistv5