{"id":"CVE-2021-3404","aliases":["ALPINE-CVE-2021-3404","DEBIAN-CVE-2021-3404","EUVD-2021-26732","GHSA-5f69-j422-38p4","MGASA-2022-0316","UBUNTU-CVE-2021-3404"],"status":"published","title":"In ytnef 1.9.3, the SwapWord function in lib/ytnef.c allows remote attackers to cause a denial-of...","description":"In ytnef 1.9.3, the SwapWord function in lib/ytnef.c allows remote attackers to cause a denial-of-service (and potentially code execution) due to a heap buffer overflow which can be triggered via a crafted 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Tracking","Third Party Advisory","report"]},{"url":"https://github.com/Yeraze/ytnef/issues/86","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Third Party Advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3404"},{"url":"https://github.com/advisories/GHSA-5f69-j422-38p4"},{"url":"https://security.alpinelinux.org/vuln/CVE-2021-3404","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-3404","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2022-0316.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=30735","tags":["report"]},{"url":"https://github.com/Yeraze/ytnef/releases","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2021-3404","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-3404","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-3404","description":"In ytnef 1.9.3, the SwapWord function in lib/ytnef.c allows remote attackers to cause a 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potentially code\nexecution) due to a double free which can be triggered via a crafted file.\n(CVE-2021-3403)\nIn ytnef 1.9.3, the SwapWord function in lib/ytnef.c allows remote\nattackers to cause a denial-of-service (and potentially code execution)\ndue to a heap buffer overflow which can be triggered via a crafted file.\n(CVE-2021-3404)\n","status":"published","published":"2022-09-02T19:59:37Z","modified":"2026-04-16T04:43:42.305719678Z","updated_at":"2026-11-02T15:49:42.263076Z"}]}}