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CVE-2018-16705: Furuno Felcom 250 Firmware: Authentication bypass

CVE-2018-16705 is rated critical with a CVSS v3.0 base score of 9.8 and NVD lists 2 affected products, including Furuno Felcom 250 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

FURUNO FELCOM 250 and 500 devices allow unauthenticated access to the xml/permission.xml file containing all of the system's usernames and passwords. This includes the Admin and Service user accounts and their unsalted MD5 hashes, as well as the SMS server password in cleartext.

Severity breakdown

CVSS v3.0 9.8: CVSS:3.0/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-200: Exposure of Sensitive Information to an Unauthorized Actor

The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Affected products

  • Furuno Felcom 250 Firmware: all versions listed by NVD
  • Furuno Felcom 500 Firmware: all versions listed by NVD

References