CVE-2012-4218

Use-after-free vulnerability in the BuildTextRunsScanner::BreakSink::SetBreaks function in Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey…

published November 21, 2012

CVSS
—
EPSS
6%
Percentile
92.8
In the wild
Unconfirmed
What it is

🚨 A use-after-free vulnerability lurking in Mozilla Firefox and its cousins could let attackers execute arbitrary code with surprising ease! ⚡ Think of it like leaving a light switch on after you’ve unplugged the lamp — someone can come along and turn the light on when they shouldn’t be able to. This vulnerability allows attackers to manipulate memory in ways that can lead to chaos. With this vulnerability, an attacker could potentially cause a denial of service, crashing the application, or even execute malicious code, leading to total loss of control. Imagine your web browser suddenly turning rogue — absolutely devastating!

Put simply

Think of it like leaving a light switch on after you’ve unplugged the lamp — someone can come along and turn the light on when they shouldn’t be able to. This vulnerability allows attackers to manipulate memory in ways that can lead to chaos. The vulnerability occurs in the BuildTextRunsScanner::BreakSink::SetBreaks function, where the system fails to properly manage memory after freeing it, making it ripe for exploitation.

What to do

With this vulnerability, an attacker could potentially cause a denial of service, crashing the application, or even execute malicious code, leading to total loss of control. Imagine your web browser suddenly turning rogue — absolutely devastating! Upgrade to Mozilla Firefox version 17.0, Thunderbird version 17.0, or SeaMonkey version 2.14 or later to patch this vulnerability. Ensure you're regularly updating your applications to stay protected against similar threats. You've got this! Stay vigilant and keep those browsers updated! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.05613 · 92.8th percentile
Published
2012-11-21T11:00Z
EPSS history
Timeline
  • 21 NOV 11:00Z
    Use-after-free vulnerability in the BuildTextRunsScanner::BreakSink::SetBreaks function in Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey…
    cvelistv5