CVE-2021-36798

Public Exploit

Description

A Denial-of-Service (DoS) vulnerability was discovered in Team Server in HelpSystems Cobalt Strike 4.2 and 4.3. It allows remote attackers to crash the C2 server thread and block beacons' communication with it.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 27.68% Top 5%
Vendor Advisory cobaltstrike.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.cobaltstrike.com/releasenotes.txt release notes vendor advisory
https://labs.sentinelone.com/hotcobalt-new-cobalt-strike-dos-vulnerability-that-lets-you-halt-operations/ third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2021-36798?
CVE-2021-36798 has been scored as a high severity vulnerability.
How to fix CVE-2021-36798?
To fix CVE-2021-36798, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-36798 being actively exploited in the wild?
It is possible that CVE-2021-36798 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~28% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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