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CVE-2017-16743: An Improper Authorization issue was discovered in PHOENIX CONTACT FL SWITCH 3xxx, 4xxx, and 48xxx Series…

CVE-2017-16743 is rated critical with a CVSS v3.0 base score of 9.8 and NVD lists 29 affected products, including Phoenixcontact Fl Switch 3005 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

An Improper Authorization issue was discovered in PHOENIX CONTACT FL SWITCH 3xxx, 4xxx, and 48xxx Series products running firmware Version 1.0 to 1.32. A remote unauthenticated attacker may be able to craft special HTTP requests allowing an attacker to bypass web-service authentication allowing the attacker to obtain administrative privileges on the device.

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-285: Improper Authorization

The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.

CWE-863: Incorrect Authorization

The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

Affected products

  • Phoenixcontact Fl Switch 3005 Firmware: from 1.0 up to and including 1.32
  • Phoenixcontact Fl Switch 3005t Firmware: from 1.0 up to and including 1.32
  • Phoenixcontact Fl Switch 3004t Fx Firmware: from 1.0 up to and including 1.32
  • Phoenixcontact Fl Switch 3004t Fx St Firmware: from 1.0 up to and including 1.32
  • Phoenixcontact Fl Switch 3008 Firmware: from 1.0 up to and including 1.32
  • Phoenixcontact Fl Switch 3008t Firmware: from 1.0 up to and including 1.32
  • Phoenixcontact Fl Switch 3006t 2fx Firmware: from 1.0 up to and including 1.32
  • Phoenixcontact Fl Switch 3006t 2fx St Firmware: from 1.0 up to and including 1.32
  • Phoenixcontact Fl Switch 3012e 2sfx Firmware: from 1.0 up to and including 1.32
  • Phoenixcontact Fl Switch 3016e Firmware: from 1.0 up to and including 1.32
  • Phoenixcontact Fl Switch 3016 Firmware: from 1.0 up to and including 1.32
  • Phoenixcontact Fl Switch 3016t Firmware: from 1.0 up to and including 1.32
  • Phoenixcontact Fl Switch 3006t 2fx Sm Firmware: from 1.0 up to and including 1.32
  • Phoenixcontact Fl Switch 4008t 2sfp Firmware: from 1.0 up to and including 1.32
  • Phoenixcontact Fl Switch 4008t 2gt 4fx Sm Firmware: from 1.0 up to and including 1.32

References