CVE-2016-5274

Use-after-free vulnerability in the nsFrameManager::CaptureFrameState function in Mozilla Firefox before 49.0, Firefox ESR 45.x before 45.4, and Thunderbird <…

published September 22, 2016

CVSS
—
EPSS
4%
Percentile
90.6
In the wild
Unconfirmed
What it is

⚠️ A crafty interaction in Firefox’s rendering could lead to a nasty surprise. A use-after-free vulnerability lurking in nsFrameManager::CaptureFrameState allows attackers to execute arbitrary code just by triggering certain animations! 🎭 Think of it like a magician who pulls a rabbit out of a hat but forgets to secure the hat properly. The moment someone distracts the magician, they might just let a whimsical creature escape — in this case, malicious code escaping into your system. If exploited, an attacker could run arbitrary code on the victim's machine, which could lead to unauthorized access, data theft, or even total control over the system. The potential for damage is mind-blowingly simple and absolutely devastating if you’re not on guard!

Put simply

Think of it like a magician who pulls a rabbit out of a hat but forgets to secure the hat properly. The moment someone distracts the magician, they might just let a whimsical creature escape — in this case, malicious code escaping into your system. This use-after-free vulnerability occurs due to improper interaction between the restyling process and the Web Animations model, allowing an attacker to manipulate memory in a way that leads to executing malicious code.

What to do

If exploited, an attacker could run arbitrary code on the victim's machine, which could lead to unauthorized access, data theft, or even total control over the system. The potential for damage is mind-blowingly simple and absolutely devastating if you’re not on guard! Ensure you’re using Firefox version 49.0 or higher and Thunderbird version 45.4 or higher, as these versions contain the necessary patches. Regularly update your browsers to stay protected against such vulnerabilities! You've got this! Just follow these steps to secure your browser and keep those sneaky vulnerabilities at bay! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.04091 · 90.6th percentile
Published
2016-09-22T22:00Z
EPSS history
Timeline
  • 22 SEP 22:00Z
    Use-after-free vulnerability in the nsFrameManager::CaptureFrameState function in Mozilla Firefox before 49.0, Firefox ESR 45.x before 45.4, and Thunderbird <…
    cvelistv5