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CVE-2018-13990: The WebUI of PHOENIX CONTACT FL SWITCH 3xxx, 4xxx, 48xx versions prior to 1.35 is vulnerable to brute-force…

CVE-2018-13990 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

The WebUI of PHOENIX CONTACT FL SWITCH 3xxx, 4xxx, 48xx versions prior to 1.35 is vulnerable to brute-force attacks, because of Improper Restriction of Excessive Authentication Attempts.

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-287: Improper Authentication

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

Affected products

  • Phoenixcontact Fl Switch 3005 Firmware: before 1.35
  • Phoenixcontact Fl Switch 3005t Firmware: before 1.35
  • Phoenixcontact Fl Switch 3004t Fx Firmware: before 1.35
  • Phoenixcontact Fl Switch 3004t Fx St Firmware: before 1.35
  • Phoenixcontact Fl Switch 3008 Firmware: before 1.35
  • Phoenixcontact Fl Switch 3008t Firmware: before 1.35
  • Phoenixcontact Fl Switch 3006t 2fx Firmware: before 1.35
  • Phoenixcontact Fl Switch 3006t 2fx St Firmware: before 1.35
  • Phoenixcontact Fl Switch 3012e 2sfx Firmware: before 1.35
  • Phoenixcontact Fl Switch 3016e Firmware: before 1.35
  • Phoenixcontact Fl Switch 3016 Firmware: before 1.35
  • Phoenixcontact Fl Switch 3016t Firmware: before 1.35
  • Phoenixcontact Fl Switch 3006t 2fx Sm Firmware: before 1.35
  • Phoenixcontact Fl Switch 4008t 2sfp Firmware: before 1.35
  • Phoenixcontact Fl Switch 4008t 2gt 4fx Sm Firmware: before 1.35

References