CVE-2019-20478

In ruamel.yaml through 0.16.7, the load method allows remote code execution if the application calls this method with an untrusted argument

published February 19, 2020

CVSS
—
EPSS
7%
Percentile
94.0
In the wild
Unconfirmed
What it is

⚡ A simple call to the load method in ruamel.yaml can turn into a security catastrophe if misused — it’s like letting a stranger into your workshop while you’re away! 🔥 Think of ruamel.yaml's load method as an open invitation to your home. If you casually allow anyone in without checking who they are, you might end up with a party crasher who redecorates your living room with chaos instead of furniture! This vulnerability allows attackers to run arbitrary code on the server, which could mean full control over the application. Imagine an intruder using your own tools against you, leading to data theft or even service disruption!

Put simply

Think of ruamel.yaml's load method as an open invitation to your home. If you casually allow anyone in without checking who they are, you might end up with a party crasher who redecorates your living room with chaos instead of furniture! This vulnerability exists because the load method in ruamel.yaml does not properly restrict execution when given untrusted input, allowing for remote code execution.

What to do

This vulnerability allows attackers to run arbitrary code on the server, which could mean full control over the application. Imagine an intruder using your own tools against you, leading to data theft or even service disruption! To protect yourself, use the safe_load method instead of load when handling untrusted data. Also, audit your code to ensure you're not inadvertently exposing this risk across your application. Keep your dependencies updated to the latest version as well. You've got this! By following these steps, you can secure your application and keep those intruders out. 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.06834 · 94.0th percentile
Published
2020-02-19T03:09Z
EPSS history
Timeline
  • 19 FEB 03:09Z
    In ruamel.yaml through 0.16.7, the load method allows remote code execution if the application calls this method with an untrusted argument
    cvelistv5