Denial of Service (DoS) Affecting wireshark package, versions [,3.2.8)


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.49% (77th percentile)

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  • Snyk IDSNYK-UNMANAGED-WIRESHARK-2318087
  • published14 Dec 2021
  • disclosed6 Oct 2020
  • creditChaoyuan Peng

Introduced: 6 Oct 2020

CVE-2020-26575  (opens in a new tab)
CWE-835  (opens in a new tab)

How to fix?

Upgrade wireshark to version 3.2.8 or higher.

Overview

Affected versions of this package are vulnerable to Denial of Service (DoS). In Wireshark through 3.2.7, the Facebook Zero Protocol (aka FBZERO) dissector could enter an infinite loop. This was addressed in epan/dissectors/packet-fbzero.c by correcting the implementation of offset advancement.

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

CVSS Scores

version 3.1