{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2023-40581", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2023-08-16T18:24:02.391Z", "datePublished": "2023-09-25T18:54:00.204Z", "dateUpdated": "2024-08-02T18:38:50.806Z"}, "containers": {"cna": {"title": "yt-dlp command injection when using `%q` in `--exec` on Windows", "problemTypes": [{"descriptions": [{"cweId": "CWE-78", "lang": "en", "description": "CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-42h4-v29r-42qg", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-42h4-v29r-42qg"}, {"name": "https://github.com/yt-dlp/yt-dlp/commit/de015e930747165dbb8fcd360f8775fd973b7d6e", "tags": ["x_refsource_MISC"], "url": "https://github.com/yt-dlp/yt-dlp/commit/de015e930747165dbb8fcd360f8775fd973b7d6e"}, {"name": "https://github.com/yt-dlp/yt-dlp-nightly-builds/releases/tag/2023.09.24.003044", "tags": ["x_refsource_MISC"], "url": "https://github.com/yt-dlp/yt-dlp-nightly-builds/releases/tag/2023.09.24.003044"}, {"name": "https://github.com/yt-dlp/yt-dlp/releases/tag/2021.04.11", "tags": ["x_refsource_MISC"], "url": "https://github.com/yt-dlp/yt-dlp/releases/tag/2021.04.11"}, {"name": "https://github.com/yt-dlp/yt-dlp/releases/tag/2023.09.24", "tags": ["x_refsource_MISC"], "url": "https://github.com/yt-dlp/yt-dlp/releases/tag/2023.09.24"}], "affected": [{"vendor": "yt-dlp", "product": "yt-dlp", "versions": [{"version": ">= 2021.04.11, < 2023.09.24", "status": "affected"}, {"version": "< nightly 2023.09.24.003044", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2023-09-25T18:54:00.204Z"}, "descriptions": [{"lang": "en", "value": "yt-dlp is a youtube-dl fork with additional features and fixes. yt-dlp allows the user to provide shell command lines to be executed at various stages in its download steps through the `--exec` flag. This flag allows output template expansion in its argument, so that metadata values may be used in the shell commands. The metadata fields can be combined with the `%q` conversion, which is intended to quote/escape these values so they can be safely passed to the shell. However, the escaping used for `cmd` (the shell used by Python's `subprocess` on Windows) does not properly escape special characters, which can allow for remote code execution if `--exec` is used directly with maliciously crafted remote data. This vulnerability only impacts `yt-dlp` on Windows, and the vulnerability is present regardless of whether `yt-dlp` is run from `cmd` or from `PowerShell`. Support for output template expansion in `--exec`, along with this vulnerable behavior, was added to `yt-dlp` in version 2021.04.11. yt-dlp version 2023.09.24 fixes this issue by properly escaping each special character. `\\n` will be replaced by `\\r` as no way of escaping it has been found. It is recommended to upgrade yt-dlp to version 2023.09.24 as soon as possible. Also, always be careful when using --exec, because while this specific vulnerability has been patched, using unvalidated input in shell commands is inherently dangerous. For Windows users who are not able to upgrade: 1. Avoid using any output template expansion in --exec other than {} (filepath). 2. If expansion in --exec is needed, verify the fields you are using do not contain \", | or &. 3. Instead of using --exec, write the info json and load the fields from it instead.\n"}], "source": {"advisory": "GHSA-42h4-v29r-42qg", "discovery": "UNKNOWN"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T18:38:50.806Z"}, "title": "CVE Program Container", "references": [{"name": "https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-42h4-v29r-42qg", "tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-42h4-v29r-42qg"}, {"name": "https://github.com/yt-dlp/yt-dlp/commit/de015e930747165dbb8fcd360f8775fd973b7d6e", "tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/yt-dlp/yt-dlp/commit/de015e930747165dbb8fcd360f8775fd973b7d6e"}, {"name": "https://github.com/yt-dlp/yt-dlp-nightly-builds/releases/tag/2023.09.24.003044", "tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/yt-dlp/yt-dlp-nightly-builds/releases/tag/2023.09.24.003044"}, {"name": "https://github.com/yt-dlp/yt-dlp/releases/tag/2021.04.11", "tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/yt-dlp/yt-dlp/releases/tag/2021.04.11"}, {"name": "https://github.com/yt-dlp/yt-dlp/releases/tag/2023.09.24", "tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/yt-dlp/yt-dlp/releases/tag/2023.09.24"}]}]}}

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