{"id":"CVE-2018-14403","aliases":["EUVD-2018-6321","GHSA-cq9c-6m4q-fv48","MGASA-2020-0062","UBUNTU-CVE-2018-14403"],"status":"published","title":"MP4NameFirstMatches in mp4util.cpp in MP4v2 2.0.0 mishandles substrings of atom names, leading to...","description":"MP4NameFirstMatches in mp4util.cpp in MP4v2 2.0.0 mishandles substrings of atom names, leading to use of an inappropriate data type for associated atoms. The resulting type confusion can cause out-of-bounds memory access.","severity":{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.02907,"percentile":0.87055,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-704"],"published":"2018-07-19T00:00:00Z","modified":"2026-10-24T10:47:37Z","affected":[{"source":"osv","ecosystem":"Mageia:7","package":"libmp4v2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.0-0.4.mga7"}]}],"bundled":5},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"mp4v2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.0~dfsg0-3","2.0.0~dfsg0-4"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"mp4v2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.0~dfsg0-6"]}],"products":[{"vendor":"techsmith","product":"mp4v2"}],"references":[{"url":"http://www.openwall.com/lists/oss-security/2018/07/18/3","tags":["x_transferred","Exploit","Mailing List","Third Party Advisory","evidence","report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6YCHVOYPIBGM5HYUMQ77KZH2IHSITKVE/","tags":["vendor-advisory","x_transferred","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FRSO2IMK6P7MOIZWGWKONPIEHKBA7WL3/","tags":["vendor-advisory","x_transferred","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GISUIWPKBWPXORUFNWBGFTKQS7UUVUC4/","tags":["vendor-advisory","x_transferred","web"]},{"url":"https://github.com/enzo1982/mp4v2/releases/tag/v2.1.0","tags":["x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-14403"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6YCHVOYPIBGM5HYUMQ77KZH2IHSITKVE/"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FRSO2IMK6P7MOIZWGWKONPIEHKBA7WL3/"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GISUIWPKBWPXORUFNWBGFTKQS7UUVUC4/"},{"url":"https://github.com/advisories/GHSA-cq9c-6m4q-fv48"},{"url":"https://advisories.mageia.org/MGASA-2020-0062.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=25962","tags":["report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/6YCHVOYPIBGM5HYUMQ77KZH2IHSITKVE/","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2018-14403","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-14403","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2018-14403","description":"MP4NameFirstMatches in mp4util.cpp in MP4v2 2.0.0 mishandles substrings of atom names, leading to use of an inappropriate data type for associated atoms. The resulting type confusion can cause out-of-bounds memory access.","status":"published","published":"2018-07-19T00:00:00Z","modified":"2024-08-05T09:29:50.984Z","updated_at":"2026-11-02T14:35:00.589142Z"}],"euvd":[{"id":"EUVD-2018-6321","description":"MP4NameFirstMatches in mp4util.cpp in MP4v2 2.0.0 mishandles substrings of atom names, leading to use of an inappropriate data type for associated atoms. The resulting type confusion can cause out-of-bounds memory access.","status":"published","published":"2018-07-19T00:00:00Z","modified":"2024-08-05T09:29:50Z","updated_at":"2026-11-03T02:39:47.244192Z"}],"ghsa":[{"id":"GHSA-cq9c-6m4q-fv48","title":"MP4NameFirstMatches in mp4util.cpp in MP4v2 2.0.0 mishandles substrings of atom names, leading to...","description":"MP4NameFirstMatches in mp4util.cpp in MP4v2 2.0.0 mishandles substrings of atom names, leading to use of an inappropriate data type for associated atoms. The resulting type confusion can cause out-of-bounds memory access.","status":"published","published":"2022-05-13T01:30:32Z","modified":"2023-04-11T15:30:31Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-704"],"updated_at":"2026-11-02T14:54:28.289847Z"}],"nvd":[{"id":"CVE-2018-14403","description":"MP4NameFirstMatches in mp4util.cpp in MP4v2 2.0.0 mishandles substrings of atom names, leading to use of an inappropriate data type for associated atoms. The resulting type confusion can cause out-of-bounds memory access.","status":"published","published":"2018-07-19T05:29:00.477Z","modified":"2026-06-17T01:40:56.907Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-704"],"updated_at":"2026-11-02T14:04:33.865124Z"}],"osv":[{"id":"CVE-2018-14403","description":"MP4NameFirstMatches in mp4util.cpp in MP4v2 2.0.0 mishandles substrings of atom names, leading to use of an inappropriate data type for associated atoms. The resulting type confusion can cause out-of-bounds memory access.","status":"published","published":"2018-07-19T05:29:00.477Z","modified":"2026-10-24T10:47:37.779524298Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:08.242347Z"},{"id":"UBUNTU-CVE-2018-14403","description":"MP4NameFirstMatches in mp4util.cpp in MP4v2 2.0.0 mishandles substrings of atom names, leading to use of an inappropriate data type for associated atoms. The resulting type confusion can cause out-of-bounds memory access.","status":"published","published":"2018-07-19T05:29:00Z","modified":"2026-04-22T11:44:49.743467Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:54:17.014176Z"},{"id":"MGASA-2020-0062","title":"Updated libmp4v2 packages fix security vulnerabilities","description":"Updated libmp4v2 packages fix security vulnerabilities:\n\nThe libmp4v2 library through version 2.1.0 is vulnerable to an integer\nunderflow when parsing an MP4Atom in mp4atom.cpp. An attacker could exploit\nthis to cause a denial of service via crafted MP4 file (CVE-2018-14325).\n\nThe libmp4v2 library through version 2.1.0 is vulnerable to an integer\noverflow and resultant heap-based buffer overflow when resizing an MP4Array\nfor the ftyp atom in mp4array.h. An attacker could exploit this to cause a\ndenial of service via crafted MP4 file (CVE-2018-14326).\n\nMP4Atom::factory in mp4atom.cpp in MP4v2 2.0.0 incorrectly uses the\nMP4ItemAtom data type in a certain case where MP4DataAtom is required, which\nallows remote attackers to cause a denial of service (memory corruption) or\npossibly have unspecified other impact via a crafted MP4 file, because access\nto the data structure has different expectations about layout as a result of\nthis type confusion (CVE-2018-14379).\n\nMP4NameFirstMatches in mp4util.cpp in MP4v2 2.0.0 mishandles substrings of\natom names, leading to use of an inappropriate data type for associated atoms.\nThe resulting type confusion can cause out-of-bounds memory access\n(CVE-2018-14403).\n\nMP4Integer32Property::Read in atom_avcC.cpp in MP4v2 2.1.0 allows remote\nattackers to cause a denial of service (heap-based buffer overflow and\napplication crash) or possibly have unspecified other impact via a crafted\nMP4 file (CVE-2018-14446).\n","status":"published","published":"2020-01-28T11:32:54Z","modified":"2026-04-16T04:44:26.91790843Z","updated_at":"2026-11-02T15:49:41.151324Z"}]}}