{"schemaVersion":3,"id":"CVE-2020-6078","aliases":["UBUNTU-CVE-2020-6078","DEBIAN-CVE-2020-6078"],"status":"published","duplicateOf":null,"title":null,"description":"An exploitable denial-of-service vulnerability exists in the message-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing mDNS messages in mdns_recv, the return value of the mdns_read_header function is not checked, leading to an uninitialized variable usage that eventually results in a null pointer dereference, leading to service crash. An attacker can send a series of mDNS messages to trigger this vulnerability.","dates":{"published":"2020-03-24T20:39:31.000Z","modified":"2026-10-08T21:13:51.025Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":10,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":10,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":5,"severity":"medium","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.03146,"percentile":0.87758,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0.06000000000000033,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.03086},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.03146,"percentile":0.87758}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.03086,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.03146,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.03146,"percentile":0.87758}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"REF_0DCBDD53BF802D7B","name":"Exploit Reference (talosintelligence.com)","source":"reference","url":"https://talosintelligence.com/vulnerability_reports/TALOS-2020-1001","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-252","name":"Unchecked Return Value","description":"The product does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"Low","url":"https://cwe.mitre.org/data/definitions/252.html"}],"affected":[{"vendor":"debian","product":"libmicrodns","name":"libmicrodns","label":"libmicrodns","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/libmicrodns","purlType":"deb","versions":[{"text":"< 0.2.0-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.2.0-1","eol":null,"hubHref":null},{"vendor":"debian","product":"vlc","name":"vlc","label":"vlc","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/vlc","purlType":"deb","versions":[{"text":"< 3.0.8-4","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.0.8-4","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"libmicrodns","name":"libmicrodns","label":"libmicrodns","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/libmicrodns","purlType":"deb","versions":[{"text":"< 0.0.8-1ubuntu0.1~esm1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.0.8-1ubuntu0.1~esm1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"vlc","name":"vlc","label":"vlc","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/vlc","purlType":"deb","versions":[{"text":"< 3.0.8-0ubuntu18.04.1+esm3","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.0.8-0ubuntu18.04.1+esm3","eol":null,"hubHref":null},{"vendor":"debian","product":"debian_linux","name":"debian linux","label":"debian_linux","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"9.0","noFixRecorded":false,"fixedIn":null},{"text":"10.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"9.0 | 10.0","eol":{"isEol":true,"eolDate":"2022-07-01T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"9","label":"9 (Stretch)","eolFrom":"2022-07-01T00:00:00.000Z","isLts":false,"isMaintained":true,"latestVersion":"9.13"},"product":{"name":"debian","label":"Debian","category":"os"}},"hubHref":"/vendor/debian/debian_linux"},{"vendor":"videolabs","product":"libmicrodns","name":"libmicrodns","label":"libmicrodns","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"0.1.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"0.1.0","eol":null,"hubHref":"/vendor/videolabs/libmicrodns"}],"affectedCount":6,"eol":{"hasEol":true,"count":1},"references":[{"url":"https://www.debian.org/security/2020/dsa-4671","label":"www.debian.org/security/2020/dsa-4671","hostname":"www.debian.org","tags":["Vendor Advisory","X Refsource DEBIAN","Third Party Advisory"]},{"url":"https://security.gentoo.org/glsa/202005-10","label":"security.gentoo.org/glsa/202005-10","hostname":"security.gentoo.org","tags":["Vendor Advisory","X Refsource GENTOO","Third Party Advisory"]},{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2020-1001","label":"talosintelligence.com/vulnerability_reports/TALOS-2020-1001","hostname":"talosintelligence.com","tags":["X Refsource MISC","REPORT","Exploit","Technical Description","Third Party Advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-6078","label":"ubuntu.com/security/CVE-2020-6078","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-6078","label":"www.cve.org/CVERecord?id=CVE-2020-6078","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-7239-1","label":"ubuntu.com/security/notices/USN-7239-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-6078","label":"security-tracker.debian.org/tracker/CVE-2020-6078","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":["DSA-4671-1","MGASA-2020-0203","USN-7239-1"],"duplicates":[],"related":["USN-7239-1"]},"timeline":[{"kind":"published","date":"2020-03-24T20:39:31.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-08T21:13:51.025Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":41,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T22:37:26.170Z","stale":false,"partial":false}}