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Potential XXE Exploitation Attempt In JVM Based Application

Status
test
Severity
high
Log source
product jvm, category application
Author
Moti Harmats
Source
github.com/SigmaHQ/sigma

Detects XML parsing issues, if the application expects to work with XML make sure that the parser is initialized safely.

MITRE ATT&CK coverage

TacticTechniques
Initial AccessT1190 Exploit Public-Facing Application

Rule body yaml

title: Potential XXE Exploitation Attempt In JVM Based Application
id: c4e06896-e27c-4583-95ac-91ce2279345d
status: test
description: Detects XML parsing issues, if the application expects to work with XML make sure that the parser is initialized safely.
references:
    - https://rules.sonarsource.com/java/RSPEC-2755
    - https://owasp.org/www-community/vulnerabilities/XML_External_Entity_(XXE)_Processing
    - https://www.wix.engineering/post/threat-and-vulnerability-hunting-with-application-server-error-logs
author: Moti Harmats
date: 2023-02-11
tags:
    - attack.initial-access
    - attack.t1190
logsource:
    category: application
    product: jvm
    definition: 'Requirements: application error logs must be collected (with LOG_LEVEL=ERROR and above)'
detection:
    keywords:
        - 'SAXParseException'
        - 'DOMException'
    condition: keywords
falsepositives:
    - If the application expects to work with XML there may be parsing issues that don't necessarily mean XXE.
level: high

Stages and Predicates

Stage 0: condition

keywords

Stage 1: keywords

keywords:
    - 'SAXParseException'
    - 'DOMException'