Denial of Service (DoS)

Affecting org.jboss.xnio:xnio-api artifact, versions [3.8.0.Final, 3.8.1.Final) || [3.7.0.Final, 3.7.8.Final)

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Overview

org.jboss.xnio:xnio-api is a simplified low-level I/O layer which can be used anywhere you are using NIO.

Affected versions of this package are vulnerable to Denial of Service (DoS). A vulnerability was discovered in XNIO where file descriptor leak caused by growing amounts of NIO Selector file handles between garbage collection cycles. It may allow the attacker to cause a denial of service.

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 org.jboss.xnio:xnio-api to version 3.8.1.Final, 3.7.8.Final or higher.

References

CVSS Score

5.9
medium severity
  • Attack Vector
    Network
  • Attack Complexity
    High
  • Privileges Required
    None
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    None
  • Integrity
    None
  • Availability
    High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/RL:O
Credit
Masafumi Miura (Red Hat)
CVE
CVE-2020-14340
CWE
CWE-400
Snyk ID
SNYK-JAVA-ORGJBOSSXNIO-590100
Disclosed
24 Jul, 2020
Published
09 Oct, 2020