Denial of Service (DoS) Affecting org.apache.mina:mina-http package, versions [2.1.0, 2.1.5) [0,2.0.22)



    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 0.74% (79th percentile)
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6.5 medium

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  • published 1 Nov 2021
  • disclosed 1 Nov 2021
  • credit Emmanuel Lécharny

How to fix?

Upgrade org.apache.mina:mina-http to version 2.1.5, 2.0.22 or higher.


org.apache.mina:mina-http is an a network application framework which helps users develop high performance and high scalability network applications easily.

Affected versions of this package are vulnerable to Denial of Service (DoS). Malformed HTTP requests may cause the HTTP Header decoder to loop indefinitely when there is more data than expected.


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