Telus Actiontec T2200H T2200H-31.128L.08 UART access control

CVSS Meta Temp Score
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CTI Interest Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Telus Actiontec T2200H T2200H-31.128L.08. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component UART Handler. Executing a manipulation can lead to access control. This vulnerability is handled as CVE-2019-12789. The physical device can be targeted for the attack. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical was found in Telus Actiontec T2200H T2200H-31.128L.08. This vulnerability affects some unknown processing of the component UART Handler. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered on Actiontec T2200H T2200H-31.128L.08 devices, as distributed by Telus. By attaching a UART adapter to the UART pins on the system board, an attacker can use a special key sequence (Ctrl-\) to obtain a shell with root privileges. After gaining root access, the attacker can mount the filesystem read-write and make permanent modifications to the device including bricking of the device, disabling vendor management of the device, preventing automatic upgrades, and permanently installing malicious code on the device.

The weakness was released 06/17/2019. This vulnerability was named CVE-2019-12789 since 06/10/2019. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

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

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.8

VulDB Base Score: 6.8
VulDB Temp Score: 6.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.8
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: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Yes
Local: Yes
Remote: No

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

06/10/2019 🔍
06/17/2019 +7 days 🔍
06/18/2019 +1 days 🔍
10/05/2023 +1570 days 🔍

Sourcesinfo

Advisory: seclists.org
Status: Not defined

CVE: CVE-2019-12789 (🔍)
GCVE (CVE): GCVE-0-2019-12789
GCVE (VulDB): GCVE-100-136576

Entryinfo

Created: 06/18/2019 09:20
Updated: 10/05/2023 18:32
Changes: 06/18/2019 09:20 (35), 06/25/2020 07:50 (17), 10/05/2023 18:32 (3)
Complete: 🔍
Cache ID: 216::103

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