{"schemaVersion":3,"id":"CVE-2020-18899","aliases":["PYSEC-2021-879","UBUNTU-CVE-2020-18899","DEBIAN-CVE-2020-18899"],"status":"published","duplicateOf":null,"title":null,"description":"An uncontrolled memory allocation in DataBufdata(subBox.length-sizeof(box)) function of Exiv2 0.27 allows attackers to cause a denial of service (DOS) via a crafted input.","dates":{"published":"2021-08-19T00:00:00.000Z","modified":"2024-10-15T15:11:22.443Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Pypi","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","exploitability":7.2,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","exploitability":7.2,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","exploitability":7.2,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":4.3,"severity":"medium","vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.01658,"percentile":0.76275,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.01658},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01658,"percentile":0.76275}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01658,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01658,"percentile":0.76275}]},"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":"GITHUB_EXIV2_EXIV2","name":"Exiv2","source":"github","url":"https://github.com/Exiv2/exiv2/issues/187","maturity":"poc","reliabilityScore":0.3,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling","description":"The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/770.html"}],"affected":[{"vendor":"debian","product":"exiv2","name":"exiv2","label":"exiv2","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/exiv2","purlType":"deb","versions":[{"text":"< 0.27.2-6","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.27.2-6","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"exiv2","name":"exiv2","label":"exiv2","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/exiv2","purlType":"deb","versions":[{"text":"< 0.25-2.1ubuntu16.04.7+esm5","noFixRecorded":false,"fixedIn":null},{"text":"< 0.25-3.1ubuntu0.18.04.11+esm1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.25-2.1ubuntu16.04.7+esm5 | < 0.25-3.1ubuntu0.18.04.11+esm1","eol":null,"hubHref":null},{"vendor":"exiv2","product":"exiv2","name":"exiv2","label":"exiv2","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"0.27","noFixRecorded":false,"fixedIn":null}],"versionsText":"0.27","eol":null,"hubHref":"/vendor/exiv2/exiv2"},{"vendor":"PyPI","product":"exiv2","name":"exiv2","label":"exiv2","ecosystem":"PyPI","cpePart":null,"purl":"pkg:pypi/exiv2","purlType":"pypi","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null}],"affectedCount":4,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/Exiv2/exiv2/issues/742","label":"github.com/Exiv2/exiv2/issues/742","hostname":"github.com","tags":["REPORT","Exploit","Issue Tracking","Third Party Advisory"]},{"url":"https://cwe.mitre.org/data/definitions/789.html","label":"cwe.mitre.org/data/definitions/789.html","hostname":"cwe.mitre.org","tags":["WEB","Technical Description"]},{"url":"https://security.gentoo.org/glsa/202312-06","label":"security.gentoo.org/glsa/202312-06","hostname":"security.gentoo.org","tags":["Vendor Advisory","Advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-18899","label":"ubuntu.com/security/CVE-2020-18899","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-18899","label":"www.cve.org/CVERecord?id=CVE-2020-18899","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-8103-1","label":"ubuntu.com/security/notices/USN-8103-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-18899","label":"security-tracker.debian.org/tracker/CVE-2020-18899","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":["SUSE-SU-2022:3598-1"],"duplicates":[],"related":["SUSE-SU-2022:3598-1","USN-8103-1"]},"timeline":[{"kind":"published","date":"2021-08-19T00:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-10-15T15:11:22.443Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":36,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T04:46:32.751Z","stale":false,"partial":false}}