eQ-3 Homematic CCU2/Homematic CCU3 JSON API default permission

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.5$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in eQ-3 Homematic CCU2 and Homematic CCU3. The affected element is an unknown function of the component JSON API. Executing a manipulation can lead to default permission. This vulnerability is handled as CVE-2020-12834. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in eQ-3 Homematic CCU2 and Homematic CCU3 (the affected version unknown) and classified as critical. This vulnerability affects an unknown part of the component JSON API. The manipulation with an unknown input leads to a default permission vulnerability. The CWE definition for the vulnerability is CWE-276. During installation, installed file permissions are set to allow anyone to modify those files. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

eQ-3 Homematic Central Control Unit (CCU)2 through 2.51.6 and CCU3 through 3.51.6 allow Remote Code Execution in the JSON API Method ReGa.runScript, by unauthenticated attackers with access to the web interface, due to the default auto-login feature being enabled during first-time setup (or factory reset).

The weakness was released 05/15/2020. This vulnerability was named CVE-2020-12834 since 05/13/2020. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1222 by the MITRE ATT&CK project.

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

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Productinfo

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.5

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
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: Default permission
CWE: CWE-276 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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

05/13/2020 🔍
05/15/2020 +2 days 🔍
05/16/2020 +1 days 🔍
05/16/2020 +0 days 🔍

Sourcesinfo

Status: Not defined

CVE: CVE-2020-12834 (🔍)
GCVE (CVE): GCVE-0-2020-12834
GCVE (VulDB): GCVE-100-155326

Entryinfo

Created: 05/16/2020 09:40
Updated: 05/16/2020 09:45
Changes: 05/16/2020 09:40 (34), 05/16/2020 09:45 (17)
Complete: 🔍
Cache ID: 216::103

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