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CVE-2017-20021: The manipulation leads to privilege escalation.

CVE-2017-20021 is rated critical with a CVSS v3.1 base score of 9.8 and NVD lists 8 affected products, including Solar Log 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

A vulnerability, which was classified as critical, was found in Solare Solar-Log 2.8.4-56/3.5.2-85. This affects an unknown part of the component File Upload. The manipulation leads to privilege escalation. It is possible to initiate the attack remotely. Upgrading to version 3.5.3-86 is able to address this issue. It is recommended to upgrade the affected component.

Severity breakdown

CVSS v3.1 9.8: CVSS:3.1/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-269: Improper Privilege Management

The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

CWE-434: Unrestricted Upload of File with Dangerous Type

The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.

Affected products

  • Solar Log 250 Firmware: 2.8.4-56; 3.5.2-85
  • Solar Log 300 Firmware: 2.8.4-56; 3.5.2-85
  • Solar Log 500 Firmware: 2.8.4-56; 3.5.2-85
  • Solar Log 800e Firmware: 2.8.4-56; 3.5.2-85
  • Solar Log 1000 Firmware: 2.8.4-56; 3.5.2-85
  • Solar Log 1000 Pm+ Firmware: 2.8.4-56; 3.5.2-85
  • Solar Log 1200 Firmware: 2.8.4-56; 3.5.2-85
  • Solar Log 2000 Firmware: 2.8.4-56; 3.5.2-85

References