VDB-134280 · CVE-2019-3932 · Qualys 13484

Crestron AM-100/AM-101 return.tgi hard-coded credentials

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CVSS Meta Temp Score
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8.3$0-$5k0.00

A vulnerability classified as critical has been found in Crestron AM-100 and AM-101. Affected is some unknown processing of the file return.tgi. The manipulation with an unknown input leads to a weak authentication vulnerability. CWE is classifying the issue as CWE-798. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Crestron AM-100 with firmware 1.6.0.2 and AM-101 with firmware 2.7.0.2 are vulnerable to authentication bypass due to a hard-coded password in return.tgi. A remote, unauthenticated attacker can use this vulnerability to control external devices via the uart_bridge.

The bug was discovered 05/01/2019. The weakness was published 04/30/2019. This vulnerability is traded as CVE-2019-3932 since 01/03/2019. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1110.001.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 13484 (Crestron AM-100 and AM-101 Multiple Vulnerabilities).

It is possible to mitigate the weakness by firewalling .

Similar entries are available at 134273, 134274, 134275 and 134276.

Affectededit

  • Crestron AM-100 1.6.0.2
  • Crestron AM-101 2.7.0.2

Productinfoedit

Vendor

Name

CPE 2.3infoedit

CPE 2.2infoedit

CVSSv3infoedit

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.3

VulDB Base Score: 7.3
VulDB Temp Score: 7.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2infoedit

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

NVD Base Score: 🔍

Exploitinginfoedit

Class: Weak authentication
CWE: CWE-798
ATT&CK: T1110.001

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfoedit

Threat: 🔍
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Countermeasuresinfoedit

Recommended: Firewall
Status: 🔍

0-Day Time: 🔍

Timelineinfoedit

01/03/2019 🔍
04/30/2019 +117 days 🔍
05/01/2019 +1 days 🔍
05/01/2019 +0 days 🔍
06/05/2020 +401 days 🔍

Sourcesinfoedit

Status: Confirmed

CVE: CVE-2019-3932 (🔍)
See also: 🔍

Entryinfoedit

Created: 05/01/2019 02:07 PM
Updated: 06/05/2020 11:37 AM
Changes: (1) vulnerability_discoverydate
Complete: 🔍

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