CVE-2012-3959

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

published August 29, 2012

CVSS
—
EPSS
5%
Percentile
91.7
In the wild
Unconfirmed
What it is

🚨 There's a sneaky use-after-free vulnerability lurking in older versions of Firefox, Thunderbird, and SeaMonkey! ⚠️ Just like a jigsaw puzzle with a missing piece, it could lead to some puzzling outcomes for your system. Think of it like a restaurant where a waiter mistakenly serves expired food because they forgot to check the date — this can lead to chaos in the kitchen when someone falls ill! In the same way, a use-after-free flaw can execute unexpected code or cause a denial of service due to memory corruption. An attacker could exploit this vulnerability to run arbitrary code on the victim's machine or cause the application to crash unexpectedly. This could result in system instability and expose sensitive data, creating a whole lot of trouble for unsuspecting users!

Put simply

Think of it like a restaurant where a waiter mistakenly serves expired food because they forgot to check the date — this can lead to chaos in the kitchen when someone falls ill! In the same way, a use-after-free flaw can execute unexpected code or cause a denial of service due to memory corruption. This use-after-free vulnerability in the nsRangeUpdater::SelAdjDeleteNode function allows remote code execution and heap memory corruption due to improper handling of memory — essentially, it's like trying to read a book with pages missing!

What to do

An attacker could exploit this vulnerability to run arbitrary code on the victim's machine or cause the application to crash unexpectedly. This could result in system instability and expose sensitive data, creating a whole lot of trouble for unsuspecting users! To protect yourself, upgrade to Firefox 15.0 or later, Thunderbird 15.0 or later, and SeaMonkey 2.12 or later. Ensure you stay updated with the latest versions to avoid such vulnerabilities! You've got this! Follow these steps, and you'll keep your browsing experience secure! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.04697 · 91.7th percentile
Published
2012-08-29T10:00Z
EPSS history
Timeline
  • 29 AUG 10:00Z
    Use-after-free vulnerability in the nsRangeUpdater::SelAdjDeleteNode function in Mozilla Firefox before 15.0, Firefox ESR 10.x before 10.0.7, Thunderbird…
    cvelistv5