VulnerabilityModified
CVE-2021-36798
A Denial-of-Service (DoS) vulnerability was discovered in Team Server in HelpSystems Cobalt Strike 4.2 and 4.3.
HIGH 7.5EPSS 4.29%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.29%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a 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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 4.29% probability · 91th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-770
- Affected
- helpsystems/cobalt strike
- Source
- cve@mitre.org
References
- https://labs.sentinelone.com/hotcobalt-new-cobalt-strike-dos-vulnerability-that-lets-you-halt-operations/Exploit, Third Party Advisory
- https://www.cobaltstrike.com/releasenotes.txtRelease Notes, Vendor Advisory
- https://labs.sentinelone.com/hotcobalt-new-cobalt-strike-dos-vulnerability-that-lets-you-halt-operations/Exploit, Third Party Advisory
- https://www.cobaltstrike.com/releasenotes.txtRelease Notes, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.