Denial of Service (DoS) Affecting com.typesafe.akka:akka-http-core_2.11 package, versions [,10.0.6)



    Attack Complexity Low
    Availability High
Expand this section
7.5 high

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  • published 24 Oct 2017
  • disclosed 2 May 2017
  • credit Martins Rumkovskis

How to fix?

Upgrade akka-http-core_2.11 to version 10.0.6 or higher.


com.typesafe.akka:akka-http-core_2.11 modules implement a full server and client-side HTTP stack on top of akka-actor and akka-stream.

Affected versions of the package are vulnerable to Denial of Service (DoS). An attacker may sent a request that contains an Accept header with an unsupported media range beginning with a wildcard. This will cause a stack overflow during negotiation of the content type. Normally, stack overflows are treated as fatal errors, so that the JVM process will shut itself down immediately.


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