{"schemaVersion":3,"id":"CVE-2020-16844","aliases":["RHSA-2020:3425","GHSA-82mm-ffjr-h86c"],"status":"published","duplicateOf":null,"title":null,"description":"In Istio 1.5.0 though 1.5.8 and Istio 1.6.0 through 1.6.7, when users specify an AuthorizationPolicy resource with DENY actions using wildcard suffixes (e.g. *-some-suffix) for source principals or namespace fields, callers will never be denied access, bypassing the intended policy.","dates":{"published":"2020-10-01T16:32:38.000Z","modified":"2024-08-04T13:45:34.406Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.8,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"OSV · Red hat","score":6.8,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","exploitability":4.1,"impact":8.7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Go","score":6.8,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","exploitability":4.1,"impact":8.7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.8,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":4.9,"severity":"medium","vector":"AV:N/AC:M/Au:S/C:P/I:P/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.01095,"percentile":0.65051,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.01095},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01095,"percentile":0.65051}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01095,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01095,"percentile":0.65051}]},"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_172440F2F48E286F","name":"Exploit Reference (istio.io)","source":"reference","url":"https://istio.io/latest/news/security/istio-security-2020-009/","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[],"affected":[{"vendor":"istio.io","product":"istio","name":"istio.io/istio","label":"istio","ecosystem":"Go","cpePart":null,"purl":"pkg:golang/istio.io/istio","purlType":"golang","versions":[{"text":"≥ 1.5.0, < 1.5.9","noFixRecorded":false,"fixedIn":null},{"text":"≥ 1.6.0, < 1.6.8","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 1.5.0, < 1.5.9 | ≥ 1.6.0, < 1.6.8","eol":null,"hubHref":null},{"vendor":"istio","product":"istio","name":"istio","label":"istio","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 1.5.0, ≤ 1.5.8","noFixRecorded":false,"fixedIn":null},{"text":"≥ 1.6.0, ≤ 1.6.7","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 1.5.0, ≤ 1.5.8 | ≥ 1.6.0, ≤ 1.6.7","eol":{"isEol":null,"eolDate":null,"matchMethod":"cpe","cycle":null,"product":{"name":"istio","label":"Istio","category":"server-app"}},"hubHref":"/vendor/istio/istio"},{"vendor":"redhat","product":"servicemesh","name":"servicemesh","label":"servicemesh","ecosystem":"Red Hat","cpePart":null,"purl":"pkg:rpm/redhat/servicemesh","purlType":"rpm","versions":[{"text":"< 0:1.1.7-1.el8","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0:1.1.7-1.el8","eol":null,"hubHref":null},{"vendor":"redhat","product":"servicemesh-citadel","name":"servicemesh-citadel","label":"servicemesh-citadel","ecosystem":"Red Hat","cpePart":null,"purl":"pkg:rpm/redhat/servicemesh-citadel","purlType":"rpm","versions":[{"text":"< 0:1.1.7-1.el8","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0:1.1.7-1.el8","eol":null,"hubHref":null},{"vendor":"redhat","product":"servicemesh-galley","name":"servicemesh-galley","label":"servicemesh-galley","ecosystem":"Red Hat","cpePart":null,"purl":"pkg:rpm/redhat/servicemesh-galley","purlType":"rpm","versions":[{"text":"< 0:1.1.7-1.el8","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0:1.1.7-1.el8","eol":null,"hubHref":null},{"vendor":"redhat","product":"servicemesh-istioctl","name":"servicemesh-istioctl","label":"servicemesh-istioctl","ecosystem":"Red Hat","cpePart":null,"purl":"pkg:rpm/redhat/servicemesh-istioctl","purlType":"rpm","versions":[{"text":"< 0:1.1.7-1.el8","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0:1.1.7-1.el8","eol":null,"hubHref":null},{"vendor":"redhat","product":"servicemesh-mixc","name":"servicemesh-mixc","label":"servicemesh-mixc","ecosystem":"Red Hat","cpePart":null,"purl":"pkg:rpm/redhat/servicemesh-mixc","purlType":"rpm","versions":[{"text":"< 0:1.1.7-1.el8","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0:1.1.7-1.el8","eol":null,"hubHref":null},{"vendor":"redhat","product":"servicemesh-mixs","name":"servicemesh-mixs","label":"servicemesh-mixs","ecosystem":"Red Hat","cpePart":null,"purl":"pkg:rpm/redhat/servicemesh-mixs","purlType":"rpm","versions":[{"text":"< 0:1.1.7-1.el8","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0:1.1.7-1.el8","eol":null,"hubHref":null},{"vendor":"redhat","product":"servicemesh-pilot-agent","name":"servicemesh-pilot-agent","label":"servicemesh-pilot-agent","ecosystem":"Red Hat","cpePart":null,"purl":"pkg:rpm/redhat/servicemesh-pilot-agent","purlType":"rpm","versions":[{"text":"< 0:1.1.7-1.el8","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0:1.1.7-1.el8","eol":null,"hubHref":null},{"vendor":"redhat","product":"servicemesh-pilot-discovery","name":"servicemesh-pilot-discovery","label":"servicemesh-pilot-discovery","ecosystem":"Red Hat","cpePart":null,"purl":"pkg:rpm/redhat/servicemesh-pilot-discovery","purlType":"rpm","versions":[{"text":"< 0:1.1.7-1.el8","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0:1.1.7-1.el8","eol":null,"hubHref":null},{"vendor":"redhat","product":"servicemesh-sidecar-injector","name":"servicemesh-sidecar-injector","label":"servicemesh-sidecar-injector","ecosystem":"Red Hat","cpePart":null,"purl":"pkg:rpm/redhat/servicemesh-sidecar-injector","purlType":"rpm","versions":[{"text":"< 0:1.1.7-1.el8","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0:1.1.7-1.el8","eol":null,"hubHref":null}],"affectedCount":11,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/istio/istio/releases","label":"github.com/istio/istio/releases","hostname":"github.com","tags":["X Refsource MISC","WEB","Vendor Advisory"]},{"url":"https://istio.io/latest/news/security/istio-security-2020-009/","label":"istio.io/latest/news/security/istio-security-2020-009/","hostname":"istio.io","tags":["X Refsource CONFIRM","ARTICLE","Exploit","Mitigation","Vendor Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2020:3425","label":"access.redhat.com/errata/RHSA-2020:3425","hostname":"access.redhat.com","tags":["Advisory"]},{"url":"https://access.redhat.com/security/updates/classification/#moderate","label":"access.redhat.com/security/updates/classification/","hostname":"access.redhat.com","tags":["ARTICLE"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1861625","label":"bugzilla.redhat.com/show_bug.cgi?id=1861625","hostname":"bugzilla.redhat.com","tags":["REPORT"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2020/rhsa-2020_3425.json","label":"security.access.redhat.com/data/csaf/v2/advisories/2020/rhsa-2020_3425.json","hostname":"security.access.redhat.com","tags":["Advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2020-16844","label":"access.redhat.com/security/cve/CVE-2020-16844","hostname":"access.redhat.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-16844","label":"www.cve.org/CVERecord?id=CVE-2020-16844","hostname":"www.cve.org","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-16844","label":"nvd.nist.gov/vuln/detail/CVE-2020-16844","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/istio/istio/commit/4c73414556b83f0e75c1b3a0a89a23103a71573c","label":"github.com/istio/istio/commit/4c73414556b83f0e75c1b3a0a89a23103a71573c","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/istio/istio/commit/72d2e135374f421b656d6f1a21f474db46134ace","label":"github.com/istio/istio/commit/72d2e135374f421b656d6f1a21f474db46134ace","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/istio/istio/releases/tag/1.5.9","label":"github.com/istio/istio/releases/tag/1.5.9","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/istio/istio/releases/tag/1.6.8","label":"github.com/istio/istio/releases/tag/1.6.8","hostname":"github.com","tags":["WEB"]},{"url":"https://istio.io/latest/news/releases/1.5.x/announcing-1.5.9","label":"istio.io/latest/news/releases/1.5.x/announcing-1.5.9","hostname":"istio.io","tags":["WEB"]},{"url":"https://istio.io/latest/news/releases/1.6.x/announcing-1.6.8","label":"istio.io/latest/news/releases/1.6.x/announcing-1.6.8","hostname":"istio.io","tags":["WEB"]},{"url":"https://istio.io/latest/news/security/istio-security-2020-009","label":"istio.io/latest/news/security/istio-security-2020-009","hostname":"istio.io","tags":["WEB"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2020-10-01T16:32:38.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-04T13:45:34.406Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":37,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T19:11:58.745Z","stale":false,"partial":false}}