{"id":"CVE-2018-11504","aliases":["DEBIAN-CVE-2018-11504","DLA-1499-1","DSA-4293-1","EUVD-2018-3533","GHSA-33rp-g78f-jw6r","MGASA-2019-0020","UBUNTU-CVE-2018-11504"],"status":"published","title":"The islist function in markdown.c in libmarkdown.a in DISCOUNT 2.2.3a allows remote attackers to...","description":"The islist function in markdown.c in libmarkdown.a in DISCOUNT 2.2.3a allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted file, as demonstrated by mkd2html.","severity":{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01459,"percentile":0.73727,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-125"],"published":"2018-05-26T21:00:00Z","modified":"2026-10-23T18:03:36Z","fixes":[{"ecosystem":"Debian:12","package":"discount","fixed_in":["2.2.4-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"discount","fixed_in":["2.2.4-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"discount","fixed_in":["2.2.4-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:14.04:LTS","package":"discount","fixed_in":["2.1.7-1+deb8u1build0.14.04.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"discount","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.4-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"discount","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.4-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"discount","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.4-1"}]}]},{"source":"osv","ecosystem":"Debian:8","package":"discount","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.7-1+deb8u1"}]}],"versions":["2.1.7-1"],"bundled":4},{"source":"osv","ecosystem":"Debian:9","package":"discount","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.2-1+deb9u1"}]}],"versions":["2.2.2-1"],"bundled":4},{"source":"osv","ecosystem":"Mageia:6","package":"discount","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.4-1.mga6"}]}],"bundled":4},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"discount","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.7-1+deb8u1build0.14.04.1"}]}],"versions":["2.1.6-2","2.1.7-1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"discount","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.8-2"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"discount","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.8-2","2.2.3b8-2"]}],"products":[{"vendor":"debian","product":"debian_linux"},{"vendor":"discount_project","product":"discount"}],"references":[{"url":"https://github.com/Orc/discount/issues/189#issuecomment-392247798","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory","report"]},{"url":"https://lists.debian.org/debian-lts-announce/2018/09/msg00009.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory"]},{"url":"https://www.debian.org/security/2018/dsa-4293","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-11504"},{"url":"https://github.com/advisories/GHSA-33rp-g78f-jw6r"},{"url":"https://security-tracker.debian.org/tracker/CVE-2018-11504","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2019-0020.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=23540","tags":["report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/7RPEBFDVJJU7ZJ2OQIKR35QQENJC2EI3/","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2018-11504","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-11504","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2018-11504","description":"The islist function in markdown.c in libmarkdown.a in DISCOUNT 2.2.3a allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted file, as demonstrated by mkd2html.","status":"published","published":"2018-05-26T21:00:00Z","modified":"2024-08-05T08:10:14.646Z","updated_at":"2026-11-02T14:35:09.139955Z"}],"euvd":[{"id":"EUVD-2018-3533","description":"The islist function in markdown.c in libmarkdown.a in DISCOUNT 2.2.3a allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted file, as demonstrated by mkd2html.","status":"published","published":"2018-05-26T21:00:00Z","modified":"2024-08-05T08:10:14Z","updated_at":"2026-11-03T02:39:54.984528Z"}],"ghsa":[{"id":"GHSA-33rp-g78f-jw6r","title":"The islist function in markdown.c in libmarkdown.a in DISCOUNT 2.2.3a allows remote attackers to...","description":"The islist function in markdown.c in libmarkdown.a in DISCOUNT 2.2.3a allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted file, as demonstrated by mkd2html.","status":"published","published":"2022-05-13T01:49:15Z","modified":"2023-02-02T05:01:51Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:51:16.795251Z"}],"nvd":[{"id":"CVE-2018-11504","description":"The islist function in markdown.c in libmarkdown.a in DISCOUNT 2.2.3a allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted file, as demonstrated by mkd2html.","status":"published","published":"2018-05-26T21:29:00.347Z","modified":"2026-06-17T01:36:04.163Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:04:28.483469Z"}],"osv":[{"id":"CVE-2018-11504","description":"The islist function in markdown.c in libmarkdown.a in DISCOUNT 2.2.3a allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted file, as demonstrated by mkd2html.","status":"published","published":"2018-05-26T21:29:00.347Z","modified":"2026-10-20T10:50:17.334924603Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:07.934182Z"},{"id":"DEBIAN-CVE-2018-11504","description":"The islist function in markdown.c in libmarkdown.a in DISCOUNT 2.2.3a allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted file, as demonstrated by mkd2html.","status":"published","published":"2018-05-26T21:29:00.347Z","modified":"2026-10-23T18:03:36.439496244Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:29.988046Z"},{"id":"UBUNTU-CVE-2018-11504","description":"The islist function in markdown.c in libmarkdown.a in DISCOUNT 2.2.3a allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted file, as demonstrated by mkd2html.","status":"published","published":"2018-05-26T21:29:00Z","modified":"2026-04-22T11:42:32.1172Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:54:16.544091Z"},{"id":"DLA-1499-1","title":"discount - security update","status":"published","published":"2018-09-08T00:00:00Z","modified":"2026-03-09T01:00:50.884727Z","updated_at":"2026-11-02T15:46:09.777694Z"},{"id":"DSA-4293-1","title":"discount - security update","status":"published","published":"2018-09-14T00:00:00Z","modified":"2026-03-09T02:08:33.776059Z","updated_at":"2026-11-02T15:46:16.862196Z"},{"id":"MGASA-2019-0020","title":"Updated discount packages fix security vulnerabilities","description":"The __mkd_trim_line function in mkdio.c in libmarkdown.a in DISCOUNT\n2.2.3a allows remote attackers to cause a denial of service (heap-based\nbuffer over-read) via a crafted file (CVE-2018-11468).\n\nDISCOUNT through version 2.2.3a is vulnerable to a Heap-based\nbuffer-overflow in the markdown.c:isfootnote() function. An attacker\ncould exploit this to cause a denial of service (CVE-2018-11503).\n\nDISCOUNT through version 2.2.3a is vulnerable to a Heap-based\nbuffer-overflow in the markdown.c:islist() function. An attacker\ncould exploit this to cause a denial of service (CVE-2018-11504).\n\nThe quoteblock function in markdown.c in libmarkdown.a in DISCOUNT\n2.2.3a allows remote attackers to cause a denial of service\n(heap-based buffer over-read) via a crafted file (CVE-2018-12495).\n","status":"published","published":"2019-01-08T21:50:23Z","modified":"2026-04-16T06:26:01.940220698Z","updated_at":"2026-11-02T15:49:40.793816Z"}]}}