Denial of Service (DoS) Affecting org.eclipse.californium:scandium package, versions [2.0.0, 2.7.3)[3.0.0, 3.6.0)


Severity

Recommended
0.0
high
0
10

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

Threat Intelligence

Exploit Maturity
Proof of concept
EPSS
0.1% (42nd percentile)

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 IDSNYK-JAVA-ORGECLIPSECALIFORNIUM-2964176
  • published31 Jul 2022
  • disclosed31 Jul 2022
  • creditNurullah Erinola

Introduced: 31 Jul 2022

CVE-2022-2576  (opens in a new tab)
CWE-408  (opens in a new tab)

How to fix?

Upgrade org.eclipse.californium:scandium to version 2.7.3, 3.6.0 or higher.

Overview

org.eclipse.californium:scandium is a library for exchanging data using DTLS over UDP.

Affected versions of this package are vulnerable to Denial of Service (DoS) in DTLS connection handling performed by DTLSConnector.java and ResumingServerHandshaker.java. An attacker can cause traffic to be sent to a forged address without properly verifying with a HelloVerifyRequest first, allowing resource consumption (ServerHello message amplification and CPU load) to a degree that can deny service to the affected system.

NOTE: Exploiting this vulnerability is only possible when DTLS_VERIFY_PEERS_ON_RESUMPTION_THRESHOLD is set to a value larger than 0.

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