Denial of Service (DoS)

Affecting hermes-engine package, versions <0.7.0

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Overview

hermes-engine is an A JavaScript engine optimized for running React Native on Android

Affected versions of this package are vulnerable to Denial of Service (DoS). An Integer signedness error in the JavaScript Interpreter allows attackers to cause a denial of service attack or a potential RCE via crafted JavaScript. Note that this is only exploitable if the application using Hermes permits evaluation of untrusted JavaScript. Hence, most React Native applications are not affected.

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 hermes-engine to version 0.7.0 or higher.

References

CVSS Score

6.6
medium severity
  • Attack Vector
    Network
  • Attack Complexity
    High
  • Privileges Required
    High
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    High
  • Integrity
    High
  • Availability
    High
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Credit
Unknown
CVE
CVE-2020-1913
CWE
CWE-400
Snyk ID
SNYK-JS-HERMESENGINE-629766
Disclosed
10 Sep, 2020
Published
10 Sep, 2020