Denial of Service (DoS) Affecting pillow package, versions [,9.0.0)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications

Snyk Learn

Learn about Denial of Service (DoS) vulnerabilities in an interactive lesson.

Start learning
  • Snyk IDSNYK-PYTHON-PILLOW-2329135
  • published3 Jan 2022
  • disclosed3 Jan 2022
  • creditdoublex

Introduced: 3 Jan 2022

CVE NOT AVAILABLE CWE-400  (opens in a new tab)

How to fix?

Upgrade Pillow to version 9.0.0 or higher.

Overview

Pillow is a PIL (Python Imaging Library) fork.

Affected versions of this package are vulnerable to Denial of Service (DoS). The JpegImagePlugin may append an EOF marker to the end of a truncated file, so that the last segment of the data will still be processed by the decoder. If the EOF marker is not detected as such, this can lead to an infinite loop where JpegImagePlugin keeps trying to end the file.

Details

Denial of Service (DoS) describes a family of attacks, all aimed at making a system inaccessible to its intended and legitimate users.

Unlike other vulnerabilities, DoS attacks usually do not aim at breaching security. Rather, they are focused on making websites and services unavailable to genuine users resulting in downtime.

One popular Denial of Service vulnerability is DDoS (a Distributed Denial of Service), an attack that attempts to clog network pipes to the system by generating a large volume of traffic from many machines.

When it comes to open source libraries, DoS vulnerabilities allow attackers to trigger such a crash or crippling of the service by using a flaw either in the application code or from the use of open source libraries.

Two common types of DoS vulnerabilities:

  • High CPU/Memory Consumption- An attacker sending crafted requests that could cause the system to take a disproportionate amount of time to process. For example, commons-fileupload:commons-fileupload.

  • Crash - An attacker sending crafted requests that could cause the system to crash. For Example, npm ws package

CVSS Scores

version 3.1