CVE-2017-17821

WTF/wtf/FastBitVector.h in WebKit, as distributed in Safari Technology Preview Release 46, allows remote attackers to cause a denial of service (buffer…

published December 21, 2017

CVSS
—
EPSS
1%
Percentile
71.9
In the wild
Unconfirmed
What it is

⚠️ A little oversight in Safari's FastBitVector can lead to a denial of service—think of it as a buffet that keeps serving up food even when there's no more room on the table! Imagine a restaurant trying to serve more plates at the same time, but the kitchen doubles the orders without checking how many diners are seated. This leads to chaos—food everywhere, and no one can eat! In this case, an attacker could trigger a buffer overflow, causing the application to crash, resulting in a denial of service. This can render the browser unresponsive, frustrating users and potentially exposing them to other risks.

Put simply

Imagine a restaurant trying to serve more plates at the same time, but the kitchen doubles the orders without checking how many diners are seated. This leads to chaos—food everywhere, and no one can eat! This vulnerability in WebKit allows a remote attacker to exploit the FastBitVector by calling the resizeSlow function improperly, mishandling array lengths, which can lead to a buffer overflow.

What to do

In this case, an attacker could trigger a buffer overflow, causing the application to crash, resulting in a denial of service. This can render the browser unresponsive, frustrating users and potentially exposing them to other risks. Update Safari Technology Preview to the latest version to ensure you have the fixed code. Always keep your software up to date to avoid vulnerabilities like this. If you're a developer using WebKit in your projects, monitor for any patches or updates related to this component. You've got this! With a quick update, you can keep your browsing experience safe and smooth. 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01379 · 71.9th percentile
Published
2017-12-21T03:00Z
EPSS history
Timeline
  • 21 DEC 03:00Z
    WTF/wtf/FastBitVector.h in WebKit, as distributed in Safari Technology Preview Release 46, allows remote attackers to cause a denial of service (buffer…
    cvelistv5