Denial of Service (DoS) Affecting yaml-cpp package, versions >=0.0.0


0.0
medium

Snyk CVSS

    Attack Complexity Low
    User Interaction Required
    Availability High

    Threat Intelligence

    EPSS 0.14% (50th percentile)
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NVD
6.5 medium
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Red Hat
3.7 low
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SUSE
5.3 medium

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  • Snyk ID SNYK-COCOAPODS-YAMLCPP-472115
  • published 8 Oct 2019
  • disclosed 28 Dec 2018
  • credit Unknown

How to fix?

There is no fixed version for yaml-cpp.

Overview

yaml-cpp is a YAML parser and emitter in C++

Affected versions of this package are vulnerable to Denial of Service (DoS). The Scanner::EnsureTokensInQueue function in yaml-cpp (aka LibYaml-C++) 0.6.2 allows remote attackers to cause a denial of service (stack consumption and application crash) via a crafted YAML file.

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

References