CVE-2017-12185CWE-391

xorg-x11-server before 1.19.5 was missing length validation in MIT-SCREEN-SAVER extension allowing malicious X client to cause X server to crash or possibly…

published January 24, 2018

CVSS
—
EPSS
4%
Percentile
90.8
In the wild
Unconfirmed
What it is

⚠️ A missing length check in the MIT-SCREEN-SAVER extension could let a not-so-friendly X client crash your X server or worse! Think of it like a restaurant that doesn’t check the size of the food orders—an oversized dish could cause chaos in the kitchen, spilling everywhere and causing a big mess! If exploited, an attacker could trigger a crash of your X server, potentially leading to arbitrary code execution. That’s like giving a stranger the ability to reroute your dinner party's playlist to something completely embarrassing!

Put simply

Think of it like a restaurant that doesn’t check the size of the food orders—an oversized dish could cause chaos in the kitchen, spilling everywhere and causing a big mess! The flaw in xorg-x11-server prior to version 1.19.5 stems from the lack of length validation in the MIT-SCREEN-SAVER extension, allowing malicious inputs to disrupt normal operation.

What to do

If exploited, an attacker could trigger a crash of your X server, potentially leading to arbitrary code execution. That’s like giving a stranger the ability to reroute your dinner party's playlist to something completely embarrassing! Upgrade your xorg-x11-server to version 1.19.5 or later to patch this vulnerability. Conduct a thorough review of your system's configurations to ensure safe usage of X clients. Regularly check for updates to maintain a secure environment. You've got this! Stay vigilant and keep those systems safe! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.04167 · 90.8th percentile
Weakness
CWE-391 · Unchecked Error Condition
Published
2018-01-24T15:00Z
EPSS history
Timeline
  • 24 JAN 15:00Z
    xorg-x11-server before 1.19.5 was missing length validation in MIT-SCREEN-SAVER extension allowing malicious X client to cause X server to crash or possibly…
    cvelistv5