{"schemaVersion":3,"id":"CVE-2020-10772","aliases":["RHSA-2020:2642"],"status":"published","duplicateOf":null,"title":null,"description":"An incomplete fix for CVE-2020-12662 was shipped for Unbound in Red Hat Enterprise Linux 7, as part of erratum RHSA-2020:2414. Vulnerable versions of Unbound could still amplify an incoming query into a large number of queries directed to a target, even with a lower amplification ratio compared to versions of Unbound that shipped before the mentioned erratum. This issue is about the incomplete fix for CVE-2020-12662, and it does not affect upstream versions of Unbound.","dates":{"published":"2020-11-27T17:40:05.000Z","modified":"2024-08-04T11:14:15.485Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"NVD","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":"OSV · Red hat","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":0.01346,"percentile":0.71003,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.01346},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01346,"percentile":0.71003}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01346,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01346,"percentile":0.71003}]},"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":[],"exploitCount":0,"weaknesses":[{"id":"CWE-406","name":"Insufficient Control of Network Message Volume (Network Amplification)","description":"The product does not sufficiently monitor or control transmitted network traffic volume, so that an actor can cause the product to transmit more traffic than should be allowed for that actor.","type":"weakness","status":"Incomplete","abstraction":"Class","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/406.html"},{"id":"CWE-400","name":"Uncontrolled Resource Consumption","description":"The product does not properly control the allocation and maintenance of a limited resource.","type":"weakness","status":"Draft","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/400.html"}],"affected":[{"vendor":"nlnetlabs","product":"unbound","name":"unbound","label":"unbound","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"1.6.6-5","noFixRecorded":false,"fixedIn":null}],"versionsText":"1.6.6-5","eol":null,"hubHref":"/vendor/nlnetlabs/unbound"},{"vendor":"redhat","product":"unbound","name":"unbound","label":"unbound","ecosystem":"Red Hat","cpePart":null,"purl":"pkg:rpm/redhat/unbound","purlType":"rpm","versions":[{"text":"< 0:1.6.6-5.el7_8","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0:1.6.6-5.el7_8","eol":null,"hubHref":null},{"vendor":"redhat","product":"unbound-debuginfo","name":"unbound-debuginfo","label":"unbound-debuginfo","ecosystem":"Red Hat","cpePart":null,"purl":"pkg:rpm/redhat/unbound-debuginfo","purlType":"rpm","versions":[{"text":"< 0:1.6.6-5.el7_8","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0:1.6.6-5.el7_8","eol":null,"hubHref":null},{"vendor":"redhat","product":"unbound-devel","name":"unbound-devel","label":"unbound-devel","ecosystem":"Red Hat","cpePart":null,"purl":"pkg:rpm/redhat/unbound-devel","purlType":"rpm","versions":[{"text":"< 0:1.6.6-5.el7_8","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0:1.6.6-5.el7_8","eol":null,"hubHref":null},{"vendor":"redhat","product":"unbound-libs","name":"unbound-libs","label":"unbound-libs","ecosystem":"Red Hat","cpePart":null,"purl":"pkg:rpm/redhat/unbound-libs","purlType":"rpm","versions":[{"text":"< 0:1.6.6-5.el7_8","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0:1.6.6-5.el7_8","eol":null,"hubHref":null},{"vendor":"redhat","product":"unbound-python","name":"unbound-python","label":"unbound-python","ecosystem":"Red Hat","cpePart":null,"purl":"pkg:rpm/redhat/unbound-python","purlType":"rpm","versions":[{"text":"< 0:1.6.6-5.el7_8","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0:1.6.6-5.el7_8","eol":null,"hubHref":null}],"affectedCount":6,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1846026","label":"bugzilla.redhat.com/show_bug.cgi?id=1846026","hostname":"bugzilla.redhat.com","tags":["X Refsource MISC","REPORT","Issue Tracking","Third Party Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2020:2642","label":"access.redhat.com/errata/RHSA-2020:2642","hostname":"access.redhat.com","tags":["Advisory"]},{"url":"https://access.redhat.com/security/updates/classification/#important","label":"access.redhat.com/security/updates/classification/","hostname":"access.redhat.com","tags":["ARTICLE"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2020/rhsa-2020_2642.json","label":"security.access.redhat.com/data/csaf/v2/advisories/2020/rhsa-2020_2642.json","hostname":"security.access.redhat.com","tags":["Advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2020-10772","label":"access.redhat.com/security/cve/CVE-2020-10772","hostname":"access.redhat.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-10772","label":"www.cve.org/CVERecord?id=CVE-2020-10772","hostname":"www.cve.org","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-10772","label":"nvd.nist.gov/vuln/detail/CVE-2020-10772","hostname":"nvd.nist.gov","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2020-11-27T17:40:05.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-04T11:14:15.485Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":30,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T07:10:48.109Z","stale":false,"partial":false}}