What is CVE-2023-28356?

CVE-2023-28356 is a high-severity vulnerability in Rocket.chat, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2023-05-11.

How severe is CVE-2023-28356?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Rocket.chat

CVE-2023-28356

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.

Vulnerability class: DoS (Denial of Service)

EPSS: 0.007 (50.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Rocket.chat
N/a Rocket.chat — versions This issue has been fixed in version 6.0> and is backported for the supported versions. Check this document for more info: https://docs.rocket.chat/resources/get-support/enterprise-support#rocket.chat-versions

Weakness classification (CWE)

References

support@hackerone.com (Third Party Advisory)

Frequently asked questions

What is CVE-2023-28356?: CVE-2023-28356 is a high-severity vulnerability in Rocket.chat, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2023-05-11.
How severe is CVE-2023-28356?: High severity. CVSS v3 base score is 7.5 out of 10.