RealVNC Viewer 6.21.406 RFB Protocol Data denial of service ⚔ [Disputed]

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.6$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in RealVNC Viewer 6.21.406. This issue affects some unknown processing of the component RFB Protocol Data Handler. The manipulation leads to denial of service. This vulnerability is traded as CVE-2021-41380. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. There are still doubts about whether this vulnerability truly exists.

Detailsinfo

A vulnerability was found in RealVNC Viewer 6.21.406. It has been rated as problematic. This issue affects an unknown code of the component RFB Protocol Data Handler. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability.

The weakness was shared 09/18/2021. It is possible to read the advisory at gist.github.com. The identification of this vulnerability is CVE-2021-41380 since 09/17/2021. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The exploit is available at gist.github.com. It is declared as proof-of-concept. The real existence of this vulnerability is still doubted at the moment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.6

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

09/17/2021 🔍
09/18/2021 +1 days 🔍
09/18/2021 +0 days 🔍
08/04/2024 +1051 days 🔍

Sourcesinfo

Advisory: gist.github.com
Status: Not defined
Disputed: 🔍

CVE: CVE-2021-41380 (🔍)
GCVE (CVE): GCVE-0-2021-41380
GCVE (VulDB): GCVE-100-182879
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/18/2021 06:56
Updated: 08/04/2024 07:03
Changes: 09/18/2021 06:56 (40), 09/22/2021 15:48 (1), 08/04/2024 07:03 (35)
Complete: 🔍
Cache ID: 216::103

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