CVE-2020-27637

The R programming language’s default package manager CRAN is affected by a path traversal vulnerability that can lead to server compromise

published January 12, 2021

CVSS
—
EPSS
2%
Percentile
82.9
In the wild
Unconfirmed
What it is

⚠️ A sneaky path traversal vulnerability lurks in R’s default package manager, CRAN! Just a misdirected install command could turn a harmless session into a potential server breach. 🔥 Think of it like a pizza delivery that goes to the wrong address. If the delivery driver isn’t careful, they might just drop off your pizza at a competitor’s restaurant instead of your front door, leaving you hungry and exposed! An attacker could exploit this vulnerability to access sensitive files on the server, potentially leading to a complete compromise. Imagine losing all your data or having your system manipulated—absolutely devastating!

Put simply

Think of it like a pizza delivery that goes to the wrong address. If the delivery driver isn’t careful, they might just drop off your pizza at a competitor’s restaurant instead of your front door, leaving you hungry and exposed! This vulnerability allows attackers to manipulate path names when installing packages via R CMD install or install.packages(), leading to unauthorized file access on the server.

What to do

An attacker could exploit this vulnerability to access sensitive files on the server, potentially leading to a complete compromise. Imagine losing all your data or having your system manipulated—absolutely devastating! To keep your environment safe, update R to version 4.0.3 immediately. Also, review your package installation methods to ensure you're not falling prey to path traversal risks! You’ve got this! With these steps, you’ll be back on track in no time! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.02268 · 82.9th percentile
Published
2021-01-12T00:00Z
EPSS history
Timeline
  • 12 JAN 00:00Z
    The R programming language’s default package manager CRAN is affected by a path traversal vulnerability that can lead to server compromise
    cvelistv5