HelpSystems Cobalt Strike Server 4.2/4.3 Screenshot readCountedBytes Hotcobalt denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.2$0-$5k0.00

Summaryinfo

A vulnerability was found in HelpSystems Cobalt Strike Server 4.2/4.3. It has been classified as problematic. This vulnerability affects the function readCountedBytes of the component Screenshot Handler. This manipulation causes denial of service. This vulnerability appears as CVE-2021-36798. In addition, an exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic was found in HelpSystems Cobalt Strike Server 4.2/4.3. Affected by this vulnerability is the function readCountedBytes of the component Screenshot Handler. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability.

The weakness was presented 08/04/2021. The advisory is shared at labs.sentinelone.com. This vulnerability is known as CVE-2021-36798. Technical details and also a public exploit are known.

It is possible to download the exploit at github.com. It is declared as proof-of-concept.

Upgrading to version 4.4 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.2

VulDB Base Score: 3.5
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Cobalt Strike Server 4.4

Timelineinfo

07/19/2021 🔍
08/04/2021 +16 days 🔍
08/04/2021 +0 days 🔍
08/04/2021 +0 days 🔍
08/08/2021 +4 days 🔍

Sourcesinfo

Advisory: labs.sentinelone.com
Status: Confirmed

CVE: CVE-2021-36798 (🔍)
GCVE (CVE): GCVE-0-2021-36798
GCVE (VulDB): GCVE-100-180073
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/04/2021 20:02
Updated: 08/08/2021 07:51
Changes: 08/04/2021 20:02 (44), 08/08/2021 07:51 (1)
Complete: 🔍
Submitter: misc
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #17584: Versions 4.2 and 4.3 of Cobalt Strike’s server contain multiple Denial of Service vulnerabilities (CVE-2021-36798) (by misc)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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