CVE-2012-3960

Use-after-free vulnerability in the mozSpellChecker::SetCurrentDictionary function in Mozilla Firefox before 15.0, Firefox ESR 10.x before 10.0.7, Thunderbird…

published August 29, 2012

CVSS
—
EPSS
5%
Percentile
92.6
In the wild
Unconfirmed
What it is

🛡️ A pesky use-after-free bug in Firefox and Thunderbird lets attackers craft a devious plan to execute arbitrary code! 😱 Think of this like a restaurant that forgets to clear a table after a diner leaves. If the next guest sits at that table without knowing it was just vacated, they might find leftover food that could make them sick – or worse, something dangerous hidden underneath! An attacker could exploit this vulnerability to run malicious code on your machine, potentially leading to full access or causing the application to crash. This could result in loss of data or even a denial of service, leaving users in a lurch when they need their browser or email client the most. Talk about a recipe for disaster!

Put simply

Think of this like a restaurant that forgets to clear a table after a diner leaves. If the next guest sits at that table without knowing it was just vacated, they might find leftover food that could make them sick – or worse, something dangerous hidden underneath! This use-after-free vulnerability occurs in the mozSpellChecker::SetCurrentDictionary function, opening the door to memory corruption. Effectively, it allows remote attackers to manipulate the application's memory, leading to arbitrary code execution or crashes.

What to do

An attacker could exploit this vulnerability to run malicious code on your machine, potentially leading to full access or causing the application to crash. This could result in loss of data or even a denial of service, leaving users in a lurch when they need their browser or email client the most. Talk about a recipe for disaster! To protect yourself, update Firefox and Thunderbird to versions 15.0 or newer, and ensure you're running SeaMonkey 2.12 or later. Regularly check for updates to keep your software secure. 🔄 You've got this! By staying updated, you can fortify your defenses and keep the internet safe. Keep up the good work! 💪

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.05408 · 92.6th percentile
Published
2012-08-29T10:00Z
EPSS history
Timeline
  • 29 AUG 10:00Z
    Use-after-free vulnerability in the mozSpellChecker::SetCurrentDictionary function in Mozilla Firefox before 15.0, Firefox ESR 10.x before 10.0.7, Thunderbird…
    cvelistv5