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XML injection (XXE) - Unmarshaller

Description​

The XML unmarshaller is not configured securely. It allows to read a source of XML data and bind its values to a new instance of an object.

Impact​

  • Escalate attack to compromise the underlying server or other back-end infrastructure.
  • Allow an attacker to view files on the application server filesystem.
  • Interact with any back-end or external systems that the application itself can access.
  • Disclosure of confidential data.

Recommendation​

The XML unmarshaller should be configured securely so that it does not allow external entities as part of an incoming XML attack.

Threat​

Anonymous attacker from the Internet.

Expected Remediation Time​

⌚ 120 minutes.

Score​

Default score using CVSS 3.1. It may change depending on the context of the src.

Base​

  • Attack vector: N
  • Attack complexity: L
  • Privileges required: N
  • User interaction: N
  • Scope: U
  • Confidentiality: L
  • Integrity: L
  • Availability: N

Temporal​

  • Exploit code maturity: P
  • Remediation level: O
  • Report confidence: X

Result​

  • Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:P/RL:O/RC:X
  • Score:
    • Base: 6.5
    • Temporal: 5.9
  • Severity:
    • Base: Medium
    • Temporal: Medium

Score 4.0​

Default score using CVSS 4.0 . It may change depending on the context of the src.

Base 4.0​

  • Attack vector: N
  • Attack complexity: L
  • Attack Requirements: N
  • Privileges required: N
  • User interaction: N
  • Confidentiality (VC): L
  • Integrity (VI): L
  • Availability (VA): N
  • Confidentiality (SC): N
  • Integrity (SI): N
  • Availability (SA): N

Threat 4.0​

  • Exploit maturity: P

Result 4.0​

  • Vector string: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
  • Score:
    • CVSS-BT: 5.5
  • Severity:
    • CVSS-BT: Medium

Requirements​

Fixes​

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