What is the severity of CVE-2023-28356?

CVE-2023-28356 is considered a critical vulnerability due to its ability to cause significant service disruption.

How do I fix CVE-2023-28356?

To fix CVE-2023-28356, update to a version of Rocket.Chat that is 6.0.0 or higher.

What systems are affected by CVE-2023-28356?

CVE-2023-28356 affects Rocket.Chat versions earlier than 6.0.0.

What kind of attack does CVE-2023-28356 represent?

CVE-2023-28356 represents a denial of service (DoS) attack through resource exhaustion.

What are the symptoms of CVE-2023-28356 exploitation?

Exploitation of CVE-2023-28356 can lead to high CPU usage, around 120%, causing the service to become unresponsive.

Vulnerability/
CVE-2023-28356

high

7.5

CWE

400 770

11/5/2023

27/1/2025

CVE-2023-28356

First published: Thu May 11 2023(Updated: )

A vulnerability has been identified where a maliciously crafted message containing a specific chain of characters can cause the chat to enter a hot loop on one of the processes, consuming ~120% CPU and rendering the service unresponsive.

Credit: support@hackerone.com support@hackerone.com

Affected Software	Affected Version	How to fix
Rocket.Chat Rocket.Chat	<6.0.0

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Reference Links

https://hackerone.com/reports/1461340

Frequently Asked Questions

What is the severity of CVE-2023-28356?
CVE-2023-28356 is considered a critical vulnerability due to its ability to cause significant service disruption.
How do I fix CVE-2023-28356?
To fix CVE-2023-28356, update to a version of Rocket.Chat that is 6.0.0 or higher.
What systems are affected by CVE-2023-28356?
CVE-2023-28356 affects Rocket.Chat versions earlier than 6.0.0.
What kind of attack does CVE-2023-28356 represent?
CVE-2023-28356 represents a denial of service (DoS) attack through resource exhaustion.
What are the symptoms of CVE-2023-28356 exploitation?
Exploitation of CVE-2023-28356 can lead to high CPU usage, around 120%, causing the service to become unresponsive.

agent/type
collector/nvd-index
agent/software-canonical-lookup-request
agent/author
agent/weakness
agent/references
agent/severity
agent/softwarecombine
agent/description
agent/first-publish-date
agent/event
agent/source
agent/tags
collector/mitre-cve
source/MITRE
agent/last-modified-date
collector/nvd-api
source/NVD
agent/software-canonical-lookup
vendor/rocket.chat
canonical/rocket.chat rocket.chat

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Frequently Asked Questions

What is the severity of CVE-2023-28356?
CVE-2023-28356 is considered a critical vulnerability due to its ability to cause significant service disruption.
How do I fix CVE-2023-28356?
To fix CVE-2023-28356, update to a version of Rocket.Chat that is 6.0.0 or higher.
What systems are affected by CVE-2023-28356?
CVE-2023-28356 affects Rocket.Chat versions earlier than 6.0.0.
What kind of attack does CVE-2023-28356 represent?
CVE-2023-28356 represents a denial of service (DoS) attack through resource exhaustion.
What are the symptoms of CVE-2023-28356 exploitation?
Exploitation of CVE-2023-28356 can lead to high CPU usage, around 120%, causing the service to become unresponsive.