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CVE-2016-10307: Trango ApexLynx: Hard-coded credentials or backdoor

CVE-2016-10307 is rated critical with a CVSS v3.1 base score of 9.8 and NVD lists 5 affected products, including Gotrango Apex Lynx Firmware. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability description

Trango ApexLynx 2.0, ApexOrion 2.0, GigaLynx 2.0, GigaOrion 2.0, and StrataLink 3.0 devices have a built-in, hidden root account, with a default password for which the MD5 hash value is public (but the cleartext value is perhaps not yet public). This account is accessible via SSH and/or TELNET, and grants access to the underlying embedded UNIX OS on the device, allowing full control over it.

Severity breakdown

CVSS v3.1 9.8: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
Attack complexity: Low. No special conditions; the attack can be repeated reliably.
Privileges required: None. No account or prior access is needed.
User interaction: None. No action from any user is needed.
Scope: Unchanged. Impact stays within the vulnerable component.
Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
Availability impact: High. Total loss of availability; the component can be shut down.

Underlying weakness

CWE-798: Use of Hard-coded Credentials

The product contains hard-coded credentials, such as a password or cryptographic key.

Affected products

Gotrango Apex Lynx Firmware: 2.0
Gotrango Apex Orion Firmware: 2.0
Gotrango Giga Lynx Firmware: 2.0
Gotrango Giga Orion Firmware: 2.0
Gotrango Stratalink Firmware: up to and including 3.0