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CVE-2018-18406: Tufin Securetrack: XML external entity injection

CVE-2018-18406 is rated critical with a CVSS v3.0 base score of 9.9 and affects Tufin Securetrack. Per its scoring, it can be exploited over the network, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability description

An issue was discovered in Tufin SecureTrack 18.1 with TufinOS 2.16 build 1179(Final). The Audit Report module is affected by a blind XXE vulnerability when a new Best Practices Report is saved using a special payload inside the xml input field. The XXE vulnerability is blind since the response doesn't directly display a requested file, but rather returns it inside the name data field when the report is saved. An attacker is able to view restricted operating system files. This issue affects all types of users: administrators or normal users.

Severity breakdown

CVSS v3.0 9.9: CVSS:3.0/AV:N/AC:L/PR:L/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: Low. No special conditions; the attack can be repeated reliably.
  • Privileges required: Low. A basic user account is enough.
  • 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-611: Improper Restriction of XML External Entity Reference

The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.

Affected products

  • Tufin Securetrack: 18.1

References