Crestron AM-100 up to 1.6.0.1 Web Interface return.cgi improper authentication

EntryHistoryDiffjsonxmlCTI

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.8	$0-$5k	0.00

A vulnerability was found in Crestron AM-100 up to 1.6.0.1 and classified as critical. This issue affects some unknown processing of the file return.cgi of the component Web Interface. The manipulation with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Crestron AM-100 before firmware version 1.6.0.2 contains an authentication bypass in the web interface's return.cgi script. Unauthenticated remote users can use the bypass to access some administrator functionality such as configuring update sources and rebooting the device.

The bug was discovered 01/10/2018. The weakness was disclosed 01/18/2019 (Website). It is possible to read the advisory at tenable.com. The identification of this vulnerability is CVE-2019-3910 since 01/03/2019. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 373 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 1.6.0.2 eliminates this vulnerability.

Productinfo

Vendor

Crestron

Name

AM-100

Version

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.2
VulDB Meta Temp Score: 8.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: AM-100 1.6.0.2

Timelineinfo

01/10/2018 🔍
01/03/2019 +358 days 🔍
01/18/2019 +15 days 🔍
01/18/2019 +0 days 🔍
01/20/2019 +2 days 🔍
05/03/2020 +469 days 🔍

Sourcesinfo

Advisory: tenable.com
Status: Not defined

CVE: CVE-2019-3910 (🔍)

Entryinfo

Created: 01/20/2019 12:42
Updated: 05/03/2020 09:30
Changes: 01/20/2019 12:42 (59), 05/03/2020 09:30 (1)
Complete: 🔍