Denial of Service (DoS)

Affecting superagent package, versions <3.7.0

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Overview

superagent is a Small progressive client-side HTTP request library, and Node.js module with the same API, supporting many high-level HTTP client features.

Affected versions of this package are vulnerable to Denial of Service (DoS). It uncompresses responses in memory, and a malicious user may send a specially crafted zip file which will then unzip in the server and cause excessive CPU consumption. This is also known as a Zip Bomb.

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

Remediation

Upgrade superagent to version 3.7.0 or higher.

References

CVSS Score

3.7
low severity
  • Attack Vector
    Network
  • Attack Complexity
    High
  • Privileges Required
    None
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    None
  • Integrity
    None
  • Availability
    Low
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Credit
Dennis Appelt
CVE
CVE-2017-16129
CWE
CWE-400
Snyk ID
npm:superagent:20170807
Disclosed
06 Aug, 2017
Published
27 Sep, 2017