CVE-2021-33564

An argument injection vulnerability in the Dragonfly gem before 1.4.0 for Ruby allows remote attackers to read and write to arbitrary files via a crafted URL…

published May 29, 2021

Patch now

High probability of exploitation

NVD has not assigned a CVSS score to this record. It sits in the 99.4th percentile for exploit probability.

CVSS
—
EPSS
72%
Percentile
99.4
In the wild
Unconfirmed
What it is

⚠️ A crafty URL can sneak past security in earlier versions of the Dragonfly gem! This argument injection vulnerability lets remote attackers read and write arbitrary files. 🔥 Think of it like a misprinted restaurant menu that allows diners to order anything, including the chef's secret recipes — if no one checks the orders, you could end up with a feast of unexpected consequences! An attacker could exploit this vulnerability to manipulate files on your server, potentially leading to devastating code execution. Imagine giving a stranger the keys to your digital kitchen — they could cook up something very harmful!

Put simply

Think of it like a misprinted restaurant menu that allows diners to order anything, including the chef's secret recipes — if no one checks the orders, you could end up with a feast of unexpected consequences! This argument injection flaw in the Dragonfly gem affects versions before 1.4.0, allowing attackers to misuse the ImageMagick convert utility through a crafted URL when the verify_url option is disabled.

What to do

An attacker could exploit this vulnerability to manipulate files on your server, potentially leading to devastating code execution. Imagine giving a stranger the keys to your digital kitchen — they could cook up something very harmful! Upgrade the Dragonfly gem to version 1.4.0 or later to close this vulnerability. Additionally, ensure that the verify_url option is enabled to maintain a strong security posture against such attacks. You've got this! Just follow these steps to protect your application and keep those digital kitchens secure! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.72143 · 99.4th percentile
Published
2021-05-29T13:19Z
EPSS history
Timeline
  • 29 MAY 13:19Z
    An argument injection vulnerability in the Dragonfly gem before 1.4.0 for Ruby allows remote attackers to read and write to arbitrary files via a crafted URL…
    cvelistv5