CVE-2021-27213

config.py in pystemon before 2021-02-13 allows code execution via YAML deserialization because SafeLoader and safe_load are not used

published February 14, 2021

CVSS
—
EPSS
3%
Percentile
85.3
In the wild
Unconfirmed
What it is

⚠️ YAML deserialization flaws are sneaky, especially when they come from config.py in pystemon before 2021-02-13! This oversight could let a crafty attacker execute code without raising alarms! 🔥 Think of it like a restaurant accepting food deliveries without checking the ingredients—if no one verifies what's in the box, you could end up serving something dangerous to the customers! An attacker could potentially run malicious code on your system, leading to unauthorized access or data manipulation. While currently not known to be exploited, the risk is still there, lurking in the shadows like a recipe gone wrong!

Put simply

Think of it like a restaurant accepting food deliveries without checking the ingredients—if no one verifies what's in the box, you could end up serving something dangerous to the customers! This vulnerability arises from pystemon using YAML deserialization without SafeLoader and safe_load, which means it could execute arbitrary code from untrusted YAML input.

What to do

An attacker could potentially run malicious code on your system, leading to unauthorized access or data manipulation. While currently not known to be exploited, the risk is still there, lurking in the shadows like a recipe gone wrong! To protect yourself, update pystemon to the latest version that addresses this vulnerability. Additionally, ensure that you always use SafeLoader and safe_load for YAML parsing in your projects, especially when handling user input. You've got this! With these steps, you can keep your systems safe and sound. 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.02614 · 85.3th percentile
Published
2021-02-14T03:05Z
EPSS history
Timeline
  • 14 FEB 03:05Z
    config.py in pystemon before 2021-02-13 allows code execution via YAML deserialization because SafeLoader and safe_load are not used
    cvelistv5