`yt-dlp` and `youtube-dl` are command-line audio/video downloaders. Prior to the fixed versions, `yt-dlp` and `youtube-dl` do not limit the extensions of downloaded files, which could lead to arbitrary filenames being created in the download folder (and path traversal on Windows). Since `yt-dlp` and `youtube-dl` also read config from the working directory (and on Windows executables will be executed from the `yt-dlp` or `youtube-dl` directory), this could lead to arbitrary code being executed.
`yt-dlp` version 2024.07.01 fixes this issue by whitelisting the allowed extensions. `youtube-dl` fixes this issue in commit `d42a222` on the `master` branch and in nightly builds tagged 2024-07-03 or later. This might mean some very uncommon extensions might not get downloaded, however it will also limit the possible exploitation surface. In addition to upgrading, have `.%(ext)s` at the end of the output template and make sure the user trusts the websites that they are downloading from. Also, make sure to never download to a directory within PATH or other sensitive locations like one's user directory, `system32`, or other binaries locations. For users who are not able to upgrade, keep the default output template (`-o \"%(title)s [%(id)s].%(ext)s`); make sure the extension of the media to download is a common video/audio/sub/... one; try to avoid the generic extractor; and/or use `--ignore-config --config-location ...` to not load config from common locations.
" } ], "value": "`yt-dlp` and `youtube-dl` are command-line audio/video downloaders. Prior to the fixed versions, `yt-dlp` and `youtube-dl` do not limit the extensions of downloaded files, which could lead to arbitrary filenames being created in the download folder (and path traversal on Windows). Since `yt-dlp` and `youtube-dl` also read config from the working directory (and on Windows executables will be executed from the `yt-dlp` or `youtube-dl` directory), this could lead to arbitrary code being executed.\n\n\n\n\n`yt-dlp` version 2024.07.01 fixes this issue by whitelisting the allowed extensions. `youtube-dl` fixes this issue in commit `d42a222` on the `master` branch and in nightly builds tagged 2024-07-03 or later. This might mean some very uncommon extensions might not get downloaded, however it will also limit the possible exploitation surface. In addition to upgrading, have `.%(ext)s` at the end of the output template and make sure the user trusts the websites that they are downloading from. Also, make sure to never download to a directory within PATH or other sensitive locations like one's user directory, `system32`, or other binaries locations. For users who are not able to upgrade, keep the default output template (`-o \"%(title)s [%(id)s].%(ext)s`); make sure the extension of the media to download is a common video/audio/sub/... one; try to avoid the generic extractor; and/or use `--ignore-config --config-location ...` to not load config from common locations." } ], "metrics": [ { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1" }, "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ] } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-669", "description": "CWE-669 Incorrect Resource Transfer Between Spheres", "lang": "en", "type": "CWE" } ] } ], "providerMetadata": { "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2024-07-03T23:32:13.285Z" }, "references": [ { "name": "https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-79w7-vh3h-8g4j", "tags": [ "x_refsource_CONFIRM" ], "url": "https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-79w7-vh3h-8g4j" }, { "name": "https://github.com/yt-dlp/yt-dlp/commit/5ce582448ececb8d9c30c8c31f58330090ced03a", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/yt-dlp/yt-dlp/commit/5ce582448ececb8d9c30c8c31f58330090ced03a" }, { "name": "https://github.com/yt-dlp/yt-dlp/releases/tag/2024.07.01", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/yt-dlp/yt-dlp/releases/tag/2024.07.01" }, { "name": "https://securitylab.github.com/advisories/GHSL-2024-090_yt-dlp", "tags": [ "x_refsource_MISC" ], "url": "https://securitylab.github.com/advisories/GHSL-2024-090_yt-dlp" }, { "tags": [ "x_refsource_MISC" ], "url": "https://github.com/dirkf/youtube-dl/security/advisories/GHSA-22fp-mf44-f2mq" }, { "tags": [ "x_refsource_MISC" ], "url": "https://securitylab.github.com/advisories/GHSL-2024-089_youtube-dl/" }, { "tags": [ "x_refsource_MISC" ], "url": "https://github.com/ytdl-org/youtube-dl/pull/32830" }, { "tags": [ "x_refsource_MISC" ], "url": "https://github.com/ytdl-org/youtube-dl/commit/d42a222ed541b96649396ef00e19552aef0f09ec" } ], "source": { "advisory": "GHSA-79w7-vh3h-8g4j", "discovery": "UNKNOWN" }, "title": "yt-dlp and youtube-dl vulnerable to file system modification and RCE through improper file-extension sanitization" }, "adp": [ { "affected": [ { "vendor": "yt-dlp_project", "product": "yt-dlp", "cpes": [ "cpe:2.3:a:yt-dlp_project:yt-dlp:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "0", "status": "affected", "lessThan": "2024.07.01", "versionType": "custom" } ] } ], "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-07-02T15:17:37.665466Z", "id": "CVE-2024-38519", "options": [ { "Exploitation": "poc" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-07-24T18:21:58.650Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T04:12:25.618Z" }, "title": "CVE Program Container", "references": [ { "name": "https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-79w7-vh3h-8g4j", "tags": [ "x_refsource_CONFIRM", "x_transferred" ], "url": "https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-79w7-vh3h-8g4j" }, { "name": "https://github.com/yt-dlp/yt-dlp/commit/5ce582448ececb8d9c30c8c31f58330090ced03a", "tags": [ "x_refsource_MISC", "x_transferred" ], "url": "https://github.com/yt-dlp/yt-dlp/commit/5ce582448ececb8d9c30c8c31f58330090ced03a" }, { "name": "https://github.com/yt-dlp/yt-dlp/releases/tag/2024.07.01", "tags": [ "x_refsource_MISC", "x_transferred" ], "url": "https://github.com/yt-dlp/yt-dlp/releases/tag/2024.07.01" }, { "name": "https://securitylab.github.com/advisories/GHSL-2024-090_yt-dlp", "tags": [ "x_refsource_MISC", "x_transferred" ], "url": "https://securitylab.github.com/advisories/GHSL-2024-090_yt-dlp" }, { "tags": [ "x_refsource_MISC", "x_transferred" ], "url": "https://github.com/dirkf/youtube-dl/security/advisories/GHSA-22fp-mf44-f2mq" }, { "tags": [ "x_refsource_MISC", "x_transferred" ], "url": "https://securitylab.github.com/advisories/GHSL-2024-089_youtube-dl/" }, { "tags": [ "x_refsource_MISC", "x_transferred" ], "url": "https://github.com/ytdl-org/youtube-dl/pull/32830" }, { "tags": [ "x_refsource_MISC", "x_transferred" ], "url": "https://github.com/ytdl-org/youtube-dl/commit/d42a222ed541b96649396ef00e19552aef0f09ec" } ] } ] } }