CVE-2011-2991

The browser engine in Mozilla Firefox 4.x through 5, SeaMonkey 2.x before 2.3, Thunderbird before 6, and possibly other products does not properly implement…

published August 18, 2011

CVSS
—
EPSS
5%
Percentile
91.4
In the wild
Unconfirmed
What it is

⚠️ A crafty flaw in the browser engine could crash your app at any moment! This vulnerability, lurking in versions of Firefox and other products, allows attackers to exploit JavaScript mishaps—like a bad recipe that ruins dinner. 🍽️ Think of it like a restaurant that doesn’t check its ingredients properly. One wrong item can spoil the whole dish, causing a chaotic kitchen and a stream of unhappy customers. In this case, the browser doesn't handle JavaScript correctly, leading to potential crashes and missed orders. An attacker could send a specially crafted input that wreaks havoc, causing your application to crash or even lead to arbitrary code execution! Just imagine your favorite app going down right when you need it most—absolutely devastating for anyone relying on it.

Put simply

Think of it like a restaurant that doesn’t check its ingredients properly. One wrong item can spoil the whole dish, causing a chaotic kitchen and a stream of unhappy customers. In this case, the browser doesn't handle JavaScript correctly, leading to potential crashes and missed orders. This vulnerability stems from improper implementation of JavaScript in the browser engine, leading to memory corruption and potential denial of service. When the browser processes malicious JavaScript, it can crash or allow code execution in the worst-case scenario.

What to do

An attacker could send a specially crafted input that wreaks havoc, causing your application to crash or even lead to arbitrary code execution! Just imagine your favorite app going down right when you need it most—absolutely devastating for anyone relying on it. To protect your applications, it's crucial to upgrade to the latest versions of Firefox, SeaMonkey, and Thunderbird. Stay vigilant and keep your software updated to avoid falling victim to this sneaky vulnerability! You've got this! Keep your applications safe and secure with these updates. 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.04520 · 91.4th percentile
Published
2011-08-18T18:00Z
EPSS history
Timeline
  • 18 AUG 18:00Z
    The browser engine in Mozilla Firefox 4.x through 5, SeaMonkey 2.x before 2.3, Thunderbird before 6, and possibly other products does not properly implement…
    cvelistv5