{"id":"CVE-2020-6077","aliases":["ALPINE-CVE-2020-6077","DEBIAN-CVE-2020-6077","DSA-4671-1","EUVD-2020-27231","GHSA-pmrj-hfp3-5wh4","MGASA-2020-0203","UBUNTU-CVE-2020-6077","USN-7239-1"],"status":"published","title":"An exploitable denial-of-service vulnerability exists in the message-parsing functionality of...","description":"An exploitable denial-of-service vulnerability exists in the message-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing mDNS messages, the implementation does not properly keep track of the available data in the message, possibly leading to an out-of-bounds read that would result in a denial of service. An attacker can send an mDNS message to trigger this vulnerability.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.02504,"percentile":0.84843,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-125"],"published":"2020-03-24T20:39:22Z","modified":"2026-11-03T06:32:26Z","fixes":[{"ecosystem":"Alpine:v3.11","package":"vlc","fixed_in":["3.0.9.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.12","package":"vlc","fixed_in":["3.0.9.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.13","package":"vlc","fixed_in":["3.0.9.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.14","package":"vlc","fixed_in":["3.0.9.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"vlc","fixed_in":["3.0.9.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"vlc","fixed_in":["3.0.9.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"vlc","fixed_in":["3.0.9.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"vlc","fixed_in":["3.0.9.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"vlc","fixed_in":["3.0.9.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"vlc","fixed_in":["3.0.9.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"vlc","fixed_in":["3.0.9.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"vlc","fixed_in":["3.0.9.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"vlc","fixed_in":["3.0.9.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"vlc","fixed_in":["3.0.9.2-r0"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"libmicrodns","fixed_in":["0.2.0-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"libmicrodns","fixed_in":["0.2.0-1"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"vlc","fixed_in":["3.0.8-4"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"vlc","fixed_in":["3.0.8-4"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"vlc","fixed_in":["3.0.8-4"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:18.04:LTS","package":"libmicrodns","fixed_in":["0.0.8-1ubuntu0.1~esm1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.11","package":"vlc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.9.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.12","package":"vlc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.9.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.13","package":"vlc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.9.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.14","package":"vlc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.9.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.15","package":"vlc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.9.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.16","package":"vlc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.9.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.17","package":"vlc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.9.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.18","package":"vlc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.9.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.19","package":"vlc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.9.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.20","package":"vlc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.9.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.21","package":"vlc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.9.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.22","package":"vlc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.9.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"vlc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.9.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.24","package":"vlc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.9.2-r0"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"libmicrodns","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.2.0-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"libmicrodns","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.2.0-1"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"vlc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.8-4"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"vlc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.8-4"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"vlc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.8-4"}]}]},{"source":"osv","ecosystem":"Debian:9","package":"vlc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.10-0+deb9u1"}]}],"versions":["2.2.6-1","2.2.6-1~deb9u1","2.2.6-2","2.2.6-3","2.2.6-4","2.2.6-5","2.2.6-6","2.2.7-1","2.2.7-1~deb8u1","2.2.7-1~deb9u1","2.2.8-1","2.2.8-2","3.0.0-1","3.0.0~rc1-1","3.0.0~rc1~20171206-1","3.0.0~rc1~20171210-1","3.0.0~rc1~20171210-2","3.0.0~rc2-1","3.0.0~rc2-2","3.0.0~rc4-1","3.0.0~rc4-2","3.0.0~rc4-3","3.0.0~rc5-1","3.0.0~rc6-1","3.0.0~rc7-1","3.0.0~rc7-2","3.0.0~rc8-1","3.0.1-1","3.0.1-2","3.0.1-3","3.0.2-0+deb9u1","3.0.2-1","3.0.2-1+0.riscv64.1","3.0.2-1+0.riscv64.2","3.0.3-1","3.0.3-1+0.riscv64.1","3.0.3-1+b1+0.riscv64.1","3.0.3-1-0+deb9u1","3.0.3-1-1","3.0.3-1-2","3.0.3-1-3","3.0.3-1-4","3.0.3-2","3.0.4-1","3.0.4-2","3.0.4-3","3.0.4-4","3.0.5-1","3.0.5-2","3.0.6-0+deb9u1","3.0.6-1","3.0.7-0+deb9u1","3.0.7-1","3.0.7.1-1","3.0.7.1-2","3.0.7.1-3","3.0.8-0+deb9u1","3.0.8-1","3.0.8-2","3.0.8-3","3.0.8-4","3.0.9.2-1"],"bundled":8},{"source":"osv","ecosystem":"Debian:10","package":"vlc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.10-0+deb10u1"}]}],"versions":["3.0.7-1","3.0.7.1-1","3.0.7.1-2","3.0.7.1-3","3.0.8-0+deb10u1","3.0.8-1","3.0.8-2","3.0.8-3","3.0.8-4","3.0.9.2-1"],"bundled":8},{"source":"osv","ecosystem":"Mageia:7","package":"vlc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.10-1.mga7"}]}],"bundled":8},{"source":"osv","ecosystem":"Mageia:7","package":"vlc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.10-1.mga7.tainted"}]}],"bundled":8},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"libmicrodns","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.8-1ubuntu0.1~esm1"}]}],"versions":["0.0.7-2","0.0.8-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"libmicrodns","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.8-1ubuntu0.1~esm1"}]}],"versions":["0.0.7-2","0.0.8-1"],"bundled":7}],"products":[{"vendor":"debian","product":"debian_linux"},{"vendor":"videolabs","product":"libmicrodns"}],"references":[{"url":"https://www.debian.org/security/2020/dsa-4671","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://security.gentoo.org/glsa/202005-10","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred","Third Party Advisory","advisory"]},{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2020-1000","tags":["x_refsource_MISC","x_transferred","Exploit","Technical Description","Third Party Advisory","evidence","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-6077"},{"url":"https://github.com/advisories/GHSA-pmrj-hfp3-5wh4"},{"url":"https://security.alpinelinux.org/vuln/CVE-2020-6077","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-6077","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2020-0203.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=26467","tags":["report"]},{"url":"https://www.videolan.org/security/sb-vlc309.html","tags":["web"]},{"url":"https://www.videolan.org/developers/vlc-branch/NEWS","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2020-6077","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-6077","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-7239-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-6071","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-6072","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-6073","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-6078","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-6079","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-6080","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-6077","description":"An exploitable denial-of-service vulnerability exists in the message-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing mDNS messages, the implementation does not properly keep track of the available data in the message, possibly leading to an out-of-bounds read that would result in a denial of service. An attacker can send an mDNS message to trigger this vulnerability.","status":"published","published":"2020-03-24T20:39:22Z","modified":"2026-10-08T21:13:50.678Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:35:52.592504Z"}],"euvd":[{"id":"EUVD-2020-27231","description":"An exploitable denial-of-service vulnerability exists in the message-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing mDNS messages, the implementation does not properly keep track of the available data in the message, possibly leading to an out-of-bounds read that would result in a denial of service. An attacker can send an mDNS message to trigger this vulnerability.","status":"published","published":"2020-03-24T20:39:22Z","modified":"2026-10-08T21:13:50Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T17:27:26.452288Z"}],"ghsa":[{"id":"GHSA-pmrj-hfp3-5wh4","title":"An exploitable denial-of-service vulnerability exists in the message-parsing functionality of...","description":"An exploitable denial-of-service vulnerability exists in the message-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing mDNS messages, the implementation does not properly keep track of the available data in the message, possibly leading to an out-of-bounds read that would result in a denial of service. An attacker can send an mDNS message to trigger this vulnerability.","status":"published","published":"2022-05-24T17:12:34Z","modified":"2023-01-29T05:01:52Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:44:56.341286Z"}],"nvd":[{"id":"CVE-2020-6077","description":"An exploitable denial-of-service vulnerability exists in the message-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing mDNS messages, the implementation does not properly keep track of the available data in the message, possibly leading to an out-of-bounds read that would result in a denial of service. An attacker can send an mDNS message to trigger this vulnerability.","status":"published","published":"2020-03-24T21:15:14.3Z","modified":"2026-10-08T22:17:01.833Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:05:56.580228Z"}],"osv":[{"id":"ALPINE-CVE-2020-6077","description":"An exploitable denial-of-service vulnerability exists in the message-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing mDNS messages, the implementation does not properly keep track of the available data in the message, possibly leading to an out-of-bounds read that would result in a denial of service. An attacker can send an mDNS message to trigger this vulnerability.","status":"published","published":"2020-03-24T21:15:14.3Z","modified":"2026-11-03T06:32:26.075077858Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-03T07:17:57.723967Z"},{"id":"CVE-2020-6077","description":"An exploitable denial-of-service vulnerability exists in the message-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing mDNS messages, the implementation does not properly keep track of the available data in the message, possibly leading to an out-of-bounds read that would result in a denial of service. An attacker can send an mDNS message to trigger this vulnerability.","status":"published","published":"2020-03-24T21:15:14.3Z","modified":"2026-10-24T10:30:28.267708068Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:16.936975Z"},{"id":"DEBIAN-CVE-2020-6077","description":"An exploitable denial-of-service vulnerability exists in the message-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing mDNS messages, the implementation does not properly keep track of the available data in the message, possibly leading to an out-of-bounds read that would result in a denial of service. An attacker can send an mDNS message to trigger this vulnerability.","status":"published","published":"2020-03-24T21:15:14.3Z","modified":"2026-10-26T12:02:06.174110258Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:34.019707Z"},{"id":"UBUNTU-CVE-2020-6077","description":"An exploitable denial-of-service vulnerability exists in the message-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing mDNS messages, the implementation does not properly keep track of the available data in the message, possibly leading to an out-of-bounds read that would result in a denial of service. An attacker can send an mDNS message to trigger this vulnerability.","status":"published","published":"2020-03-24T21:15:00Z","modified":"2026-04-22T12:42:02.031787Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:25.179924Z"},{"id":"DSA-4671-1","title":"vlc - security update","status":"published","published":"2020-04-30T00:00:00Z","modified":"2026-03-09T02:11:34.378586Z","updated_at":"2026-11-02T15:46:17.19998Z"},{"id":"MGASA-2020-0203","title":"Updated vlc packages fix security vulnerabilities","description":"Multiple security issues were discovered in the microdns plugin of the\nVLC media player, which could result in denial of service or potentially\nthe execution of arbitrary code via malicious mDNS packets (CVE-2020-6071,\nCVE-2020-6072, CVE-2020-6073, CVE-2020-6077, CVE-2020-6078, CVE-2020-6079,\nCVE-2020-6080).\n\nVLC has been updated to 3.0.10 to fix theese and other issues.\n","status":"published","published":"2020-05-08T10:57:54Z","modified":"2026-04-16T04:43:03.53543783Z","updated_at":"2026-11-02T15:49:41.151324Z"},{"id":"USN-7239-1","title":"libmicrodns vulnerabilities","description":"It was discovered that libmicrodns could recursively follow the same\ncompression pointer, leading to an infinite loop. An attacker could\npossibly use this issue to cause a denial of service. (CVE-2020-6071)\n\nIt was discovered that libmicrodns did not check the return value of the\nrr_decode function, which could lead to a double free. An attacker could\npossibly use this issue to execute arbitrary code. (CVE-2020-6072)\n\nIt was discovered that libmicrodns incorrectly handled certain inputs,\nwhich could lead to an integer overflow. An attacker could possibly use\nthis issue to cause a denial of service. (CVE-2020-6073)\n\nIt was discovered that libmicrodns incorrectly handled certain inputs,\nwhich could lead to a out-of-bounds read. An attacker could possibly use\nthis issue to cause a denial of service. (CVE-2020-6077)\n\nIt was discovered that libmicrodns incorrectly handled memory when parsing\nmDNS messages in mdns_recv, which could lead to a NULL pointer dereference.\nAn attacker could possibly use this issue to cause a denial of service.\n(CVE-2020-6078)\n\nIt was discovered that libmicrodns incorrectly handled memory, which could\nlead to excessive memory consumption due to memory leaks. An attacker\ncould possibly use this issue to cause a denial of service.\n(CVE-2020-6079, CVE-2020-6080)\n","status":"published","published":"2025-01-28T23:36:20Z","modified":"2026-04-22T10:54:16.199918Z","updated_at":"2026-11-02T16:58:18.876384Z"}]}}