CVE-2019-0211KEV · OVERDUE

Apache HTTP Server Privilege Escalation Vulnerability

High · published April 8, 2019

Patch now

Confirmed exploited, and the score agrees

CVSS calls it high at 7.8. It is confirmed in active exploitation. It sits in the 99.3th percentile for exploit probability.

1635
days past CISA
deadline
CVSS v3.1
7.8
EPSS
65%
Percentile
99.3
In the wild
Confirmed
What it is

🔥 A crafty scoreboard manipulation is all it takes to let child processes run amok in your Apache HTTP Server! ⚡ Think of it like a restaurant where the kitchen staff (child processes) can sneak into the office (parent process) to steal the secret family recipe (privileges). If they can get in, they could whip up anything they want! An attacker could exploit this vulnerability to execute arbitrary code with the same privileges as the parent process, typically root. This means they could potentially take complete control of the server, accessing sensitive data or even shutting down critical services. Talk about a recipe for disaster!

Put simply

Think of it like a restaurant where the kitchen staff (child processes) can sneak into the office (parent process) to steal the secret family recipe (privileges). If they can get in, they could whip up anything they want! This vulnerability affects Apache HTTP Server versions 2.4.17 to 2.4.38 running on MPM event, worker, or prefork configurations, allowing code in less-privileged child processes to escalate privileges through scoreboard manipulation.

What to do

An attacker could exploit this vulnerability to execute arbitrary code with the same privileges as the parent process, typically root. This means they could potentially take complete control of the server, accessing sensitive data or even shutting down critical services. Talk about a recipe for disaster! Upgrade your Apache HTTP Server to version 2.4.39 or later immediately to close this loophole. Additionally, review your server configurations to ensure only necessary privileges are granted to processes. Don't forget to monitor your systems for any suspicious activity! You've got this! By following these steps, you'll secure your server and gain those superhero vibes! 🦸

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.65005 · 99.3th percentile
Published
2019-04-08T21:31Z
KEV added
2021-11-03 · due 2022-05-03
EPSS history
Timeline
  • 03 NOV 00:00Z
    Added to CISA KEV — remediate by May 3
    kev
  • 08 APR 21:31Z
    In Apache HTTP Server 2.4 releases 2.4.17 to 2.4.38, with MPM event, worker or prefork, code executing in less-privileged child processes or threads (including…
    cvelistv5