https://bugzilla.suse.com/show_bug.cgi?id=1226223 Bug ID: 1226223 Summary: VUL-0: CVE-2024-22423: yt-dlp: `--exec` command injection when using `%q` in yt-dlp on Windows Classification: openSUSE Product: openSUSE Distribution Version: Leap 15.6 Hardware: Other URL: https://smash.suse.de/issue/401050/ OS: Other Status: NEW Severity: Normal Priority: P5 - None Component: Security Assignee: jengelh@inai.de Reporter: smash_bz@suse.de QA Contact: security-team@suse.de CC: camila.matos@suse.com Target Milestone: --- Found By: Security Response Team Blocker: --- yt-dlp is a youtube-dl fork with additional features and fixes. The patch that addressed CVE-2023-40581 attempted to prevent RCE when using `--exec` with `%q` by replacing double quotes with two double quotes. However, this escaping is not sufficient, and still allows expansion of environment variables. 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 2024.04.09 fixes this issue by properly escaping `%`. It replaces them with `%%cd:~,%`, a variable that expands to nothing, leaving only the leading percent. It is recommended to upgrade yt-dlp to version 2024.04.09 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, avoid using any output template expansion in `--exec` other than `{}` (filepath); if expansion in `--exec` is needed, verify the fields you are using do not contain `"`, `|` or `&`; and/or instead of using `--exec`, write the info json and load the fields from it instead. References: https://github.com/yt-dlp/yt-dlp/commit/de015e930747165dbb8fcd360f8775fd973b... https://github.com/yt-dlp/yt-dlp/releases/tag/2021.04.11 https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-42h4-v29r-42qg http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-22423 https://www.cve.org/CVERecord?id=CVE-2024-22423 https://github.com/yt-dlp/yt-dlp/commit/ff07792676f404ffff6ee61b5638c9dc1a33... https://github.com/yt-dlp/yt-dlp/releases/tag/2024.04.09 https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-hjq6-52gw-2g7p https://bugzilla.redhat.com/show_bug.cgi?id=2270691 https://www.kb.cert.org/vuls/id/123335 https://flatt.tech/research/posts/batbadbut-you-cant-securely-execute-comman... https://learn.microsoft.com/en-us/archive/blogs/twistylittlepassagesallalike... -- You are receiving this mail because: You are on the CC list for the bug.