Denial of Service (DoS) Affecting opcua package, versions <0.11.0


0.0
high

Snyk CVSS

    Exploit Maturity Proof of concept
    Attack Complexity Low
    Availability High
Expand this section
NVD
7.5 high

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  • Snyk ID SNYK-RUST-OPCUA-2988750
  • published 22 Aug 2022
  • disclosed 22 Aug 2022
  • credit Vera Mens, Uri Katz, Sharon Brizinov of Team82 (Claroty Research)

How to fix?

Upgrade opcua to version 0.11.0 or higher.

Overview

opcua is an OPC UA server / client API implementation for Rust.

Affected versions of this package are vulnerable to Denial of Service (DoS) via the ExtensionObjects and Variants objects, when it allows unlimited nesting levels, which could result in a stack overflow even if the message size is less than the maximum allowed.

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