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CVE-2016-9362: Wago Pfc200 Firmware: Improper Authentication

CVE-2016-9362 is rated critical with a CVSS v3.0 base score of 9.1 and NVD lists 3 affected products, including Wago Pfc200 Firmware. Per its scoring, it can be exploited over the network, without authentication, without any user interaction.

Vulnerability description

An issue was discovered in WAGO 750-8202/PFC200 prior to FW04 (released August 2015), WAGO 750-881 prior to FW09 (released August 2016), and WAGO 0758-0874-0000-0111. By accessing a specific uniform resource locator (URL) on the web server, a malicious user is able to edit and to view settings without authenticating.

Severity breakdown

CVSS v3.0 9.1: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

  • 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: None. No effect on availability.

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

  • Wago Pfc200 Firmware: all versions listed by NVD
  • Wago 750 Xxxx Series Firmware: all versions listed by NVD
  • Wago 758 Xxxx Series Firmware: all versions listed by NVD

References