T3MP3ST public launch build
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cve: CVE-2021-44228
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alias: Log4Shell
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cwe_primary: CWE-917
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cwe_acceptable: [CWE-917, CWE-94, CWE-20, CWE-502, CWE-74]
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target_file: source.java
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vuln_lines: [34, 35, 36]
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severity: critical
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vuln_class: expression_injection
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exploit_pattern_regex: '\$\{jndi:(ldap|rmi|dns)://'
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must_mention_any:
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- jndi
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- lookup
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- substitut
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- ${
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- attacker controlled
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- remote class
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- expression injection
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- code execution
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points: 30
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notes: |
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Vulnerability: format() invokes substitutor.replace(event, formatted) on the
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message body itself when it contains `${`. The substitutor resolves nested
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lookups including `${jndi:...}` which fetches and deserialises a remote class.
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Any logged user-controlled string becomes an RCE primitive.
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Hunter MUST identify:
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1. Recursive substitution of message body contents
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2. JNDI lookup is reachable through the substitutor
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3. Lack of lookups-disabled guard (`noLookups` is dead-code)
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