CVE-2024-38519 Affecting yt-dlp package, versions <2024.07.01-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published6 Dec 2024
- disclosed2 Jul 2024
Introduced: 2 Jul 2024
CVE-2024-38519 (opens in a new tab)How to fix?
Upgrade Alpine:3.21 yt-dlp to version 2024.07.01-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream yt-dlp package and not the yt-dlp package as distributed by Alpine.
See How to fix? for Alpine:3.21 relevant fixed versions and status.
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.
References
- https://github.com/dirkf/youtube-dl/security/advisories/GHSA-22fp-mf44-f2mq
- https://github.com/yt-dlp/yt-dlp/commit/5ce582448ececb8d9c30c8c31f58330090ced03a
- https://github.com/yt-dlp/yt-dlp/releases/tag/2024.07.01
- https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-79w7-vh3h-8g4j
- https://github.com/ytdl-org/youtube-dl/commit/d42a222ed541b96649396ef00e19552aef0f09ec
- https://github.com/ytdl-org/youtube-dl/pull/32830
- https://securitylab.github.com/advisories/GHSL-2024-089_youtube-dl/
- https://securitylab.github.com/advisories/GHSL-2024-090_yt-dlp