tmp: Type-confusion bypass of _assertPath in tmp@0.2.6 allows path traversal via non-string prefix/postfix/template
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| raszi | node-tmp | affected |
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| Source | ID | Title |
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Github GHSA |
GHSA-7c78-jf6q-g5cm | tmp: Type-confusion bypass of _assertPath allows path traversal via non-string prefix/postfix/template |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.496% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Raszi tmp
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| CPEs | cpe:2.3:a:raszi:tmp:0.2.6:*:*:*:*:node.js:*:* | |
| Vendors & Products |
Raszi tmp
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| Type | Values Removed | Values Added |
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| First Time appeared |
Raszi
Raszi node-tmp |
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| Vendors & Products |
Raszi
Raszi node-tmp |
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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| Type | Values Removed | Values Added |
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| Description | tmp is a temporary file and directory creator for node.js. In version 0.2.6, the _assertPath guard added to tmp rejects only string values that contain the substring ... It is bypassed when prefix, postfix, or template is supplied as a non-string value (Array, Buffer, or any object) whose includes('..') returns falsy but whose stringification still contains ../. The value flows through Array.prototype.join/String coercion inside _generateTmpName and path.join(tmpDir, opts.dir, name), producing a final path that escapes tmpdir and creates a file or directory at an attacker-controlled location with the host process's privileges. This affects any application that forwards untrusted request data (a common pattern is JSON body fields or qs-parsed bracket-array query strings such as ?prefix[]=...) into tmp.file, tmp.fileSync, tmp.dir, tmp.dirSync, tmp.tmpName, or tmp.tmpNameSync without explicit type coercion. This vulnerability is fixed in 0.2.7. | |
| Title | tmp: Type-confusion bypass of _assertPath in tmp@0.2.6 allows path traversal via non-string prefix/postfix/template | |
| Weaknesses | CWE-20 CWE-22 |
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| References |
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| Metrics |
cvssV3_1
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