Quantum Secular Labs / Blog / Advisories

CVE-2018-10731: All Phoenix Contact managed FL SWITCH 3xxx, 4xxx, 48xx products running firmware version 1.0 to 1.33 are…

CVE-2018-10731 is rated critical with a CVSS v3.0 base score of 9.0 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

All Phoenix Contact managed FL SWITCH 3xxx, 4xxx, 48xx products running firmware version 1.0 to 1.33 are prone to buffer overflows when handling very large cookies (a different vulnerability than CVE-2018-10728).

Severity breakdown

CVSS v3.0 9.0: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

  • Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
  • Attack complexity: High. Success depends on conditions outside the attacker’s control.
  • Privileges required: None. No account or prior access is needed.
  • User interaction: None. No action from any user is needed.
  • Scope: Changed. Impact reaches beyond the vulnerable component to other resources.
  • 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-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary.

Affected products

  • Phoenixcontact Fl Switch 3005 Firmware: after 1.0 up to and including 1.33
  • Phoenixcontact Fl Switch 3005t Firmware: from 1.0 up to and including 1.33
  • Phoenixcontact Fl Switch 3004t Fx Firmware: from 1.0 up to and including 1.33
  • Phoenixcontact Fl Switch 3004t Fx St Firmware: from 1.0 up to and including 1.33
  • Phoenixcontact Fl Switch 3008 Firmware: from 1.0 up to and including 1.33
  • Phoenixcontact Fl Switch 3008t Firmware: from 1.0 up to and including 1.33
  • Phoenixcontact Fl Switch 3006t 2fx Firmware: from 1.0 up to and including 1.33
  • Phoenixcontact Fl Switch 3006t 2fx St Firmware: from 1.0 up to and including 1.33
  • Phoenixcontact Fl Switch 3012e 2sfx Firmware: from 1.0 up to and including 1.33
  • Phoenixcontact Fl Switch 3016e Firmware: from 1.0 up to and including 1.33
  • Phoenixcontact Fl Switch 3016 Firmware: from 1.0 up to and including 1.33
  • Phoenixcontact Fl Switch 3016t Firmware: from 1.0 up to and including 1.33
  • Phoenixcontact Fl Switch 3006t 2fx Sm Firmware: from 1.0 up to and including 1.33
  • Phoenixcontact Fl Switch 4008t 2sfp Firmware: from 1.0 up to and including 1.33
  • Phoenixcontact Fl Switch 4008t 2gt 4fx Sm Firmware: from 1.0 up to and including 1.33

References