| 1 | rules: |
| 2 | |
| 3 | - id: cyc-py-zipslip |
| 4 | languages: [python] |
| 5 | severity: ERROR |
| 6 | message: > |
| 7 | ZipFile.extractall / TarFile.extractall trusts archive entry names; a `../` entry escapes the |
| 8 | target dir (zip-slip) -> arbitrary file WRITE, chainable to RCE (drop into a startup/.pth/cron |
| 9 | path). IMPACT GATE: Family 7 -> Family 1. |
| 10 | metadata: |
| 11 | cwe: ["CWE-22: Path Traversal", "CWE-29: Path Traversal ZipSlip"] |
| 12 | confidence: HIGH |
| 13 | archetype: [ml-model-loaders, devops-infra] |
| 14 | impact: arbitrary-file-write |
| 15 | patterns: |
| 16 | - pattern-either: |
| 17 | - pattern: $Z.extractall(...) |
| 18 | - pattern: $Z.extract(...) |
| 19 | - pattern: zipfile.ZipFile(...).extractall(...) |
| 20 | - pattern: tarfile.open(...).extractall(...) |
| 21 | |
| 22 | - id: cyc-py-file-open-tainted |
| 23 | languages: [python] |
| 24 | severity: WARNING |
| 25 | message: > |
| 26 | open() / send_file() with a non-literal path is a path-traversal CANDIDATE if the path is |
| 27 | attacker-controlled and not normalized+allowlisted. IMPACT GATE: Family 7 (arbitrary file read). |
| 28 | Confirm taint in Joern; literal paths are not matched. |
| 29 | metadata: |
| 30 | cwe: ["CWE-22: Path Traversal"] |
| 31 | confidence: MEDIUM |
| 32 | archetype: [devops-infra, ai-agent-mcp] |
| 33 | impact: arbitrary-file-read |
| 34 | patterns: |
| 35 | - pattern-either: |
| 36 | - pattern: open($P, ...) |
| 37 | - pattern: open($P) |
| 38 | - pattern: send_file($P, ...) |
| 39 | - pattern: send_from_directory(..., $P, ...) |
| 40 | - pattern: flask.send_file($P, ...) |
| 41 | - metavariable-pattern: |
| 42 | metavariable: $P |
| 43 | patterns: |
| 44 | - pattern-not: "\"...\"" |
| 45 | - pattern-not: "'...'" |
| 46 | |
| 47 | - id: cyc-js-fs-tainted |
| 48 | languages: [javascript, typescript] |
| 49 | severity: WARNING |
| 50 | message: > |
| 51 | fs read/write with a non-literal path is a path-traversal CANDIDATE. res.sendFile / res.download |
| 52 | with a tainted path serves arbitrary files. IMPACT GATE: Family 7. Confirm taint in Joern. |
| 53 | metadata: |
| 54 | cwe: ["CWE-22: Path Traversal"] |
| 55 | confidence: MEDIUM |
| 56 | archetype: [electron-desktop, devops-infra] |
| 57 | impact: arbitrary-file-read |
| 58 | patterns: |
| 59 | - pattern-either: |
| 60 | - pattern: fs.readFile($P, ...) |
| 61 | - pattern: fs.readFileSync($P, ...) |
| 62 | - pattern: fs.createReadStream($P, ...) |
| 63 | - pattern: fs.writeFile($P, ...) |
| 64 | - pattern: fs.writeFileSync($P, ...) |
| 65 | - pattern: $RES.sendFile($P, ...) |
| 66 | - pattern: $RES.download($P, ...) |
| 67 | - metavariable-pattern: |
| 68 | metavariable: $P |
| 69 | patterns: |
| 70 | - pattern-not: "\"...\"" |
| 71 | - pattern-not: "'...'" |
| 72 | |
| 73 | - id: cyc-java-zipslip-file |
| 74 | languages: [java] |
| 75 | severity: ERROR |
| 76 | message: > |
| 77 | new File(dir, zipEntry.getName()) / Files.copy with an archive-controlled name is zip-slip -> |
| 78 | arbitrary file write. Also flags File/FileInputStream built from request input. IMPACT GATE: |
| 79 | Family 7 -> Family 1. |
| 80 | metadata: |
| 81 | cwe: ["CWE-22: Path Traversal", "CWE-29: Path Traversal ZipSlip"] |
| 82 | confidence: MEDIUM |
| 83 | archetype: [devops-infra] |
| 84 | impact: arbitrary-file-write |
| 85 | patterns: |
| 86 | - pattern-either: |
| 87 | - pattern: new File($DIR, $E.getName()) |
| 88 | - pattern: Files.copy($IN, $DEST, ...) |
| 89 | - pattern: new FileOutputStream(new File($DIR, $E.getName())) |
| 90 | |
| 91 | - id: cyc-c-fopen-tainted |
| 92 | languages: [c, cpp] |
| 93 | severity: WARNING |
| 94 | message: > |
| 95 | fopen/open with a non-literal path is a path-traversal CANDIDATE in native parsers/servers. |
| 96 | IMPACT GATE: Family 7. Confirm taint in Joern. |
| 97 | metadata: |
| 98 | cwe: ["CWE-22: Path Traversal"] |
| 99 | confidence: MEDIUM |
| 100 | archetype: [memory-unsafe-parsers, devops-infra] |
| 101 | impact: arbitrary-file-read |
| 102 | patterns: |
| 103 | - pattern-either: |
| 104 | - pattern: fopen($P, ...) |
| 105 | - pattern: open($P, ...) |
| 106 | - pattern: openat($D, $P, ...) |
| 107 | - metavariable-pattern: |
| 108 | metavariable: $P |
| 109 | patterns: |
| 110 | - pattern-not: "\"...\"" |