{"schemaVersion":3,"id":"CVE-2020-1888","aliases":["UBUNTU-CVE-2020-1888"],"status":"published","duplicateOf":null,"title":null,"description":"Insufficient boundary checks when decoding JSON in handleBackslash reads out of bounds memory, potentially leading to DOS. This issue affects HHVM 4.45.0, 4.44.0, 4.43.0, 4.42.0, 4.41.0, 4.40.0, 4.39.0, versions between 4.33.0 and 4.38.0 (inclusive), versions between 4.9.0 and 4.32.0 (inclusive), and versions prior to 4.8.7.","dates":{"published":"2020-03-03T15:00:25.000Z","modified":"2024-08-04T06:53:59.615Z","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 · 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":"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":0.01148,"percentile":0.6649,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-21T00:00:00.000Z","baselineScore":0.01148},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.01148,"percentile":0.6649}],"last30":[{"date":"2026-09-21T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01148,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.01148,"percentile":0.6649}]},"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-125","name":"Out-of-bounds Read","description":"The product reads data past the end, or before the beginning, of the intended buffer.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/125.html"}],"affected":[{"vendor":"ubuntu","product":"hhvm","name":"hhvm","label":"hhvm","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/hhvm","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"facebook","product":"hhvm","name":"hhvm","label":"hhvm","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"4.45.1","noFixRecorded":false,"fixedIn":null},{"text":"4.44.1","noFixRecorded":false,"fixedIn":null},{"text":"4.43.1","noFixRecorded":false,"fixedIn":null},{"text":"4.42.1","noFixRecorded":false,"fixedIn":null},{"text":"4.41.1","noFixRecorded":false,"fixedIn":null},{"text":"4.40.1","noFixRecorded":false,"fixedIn":null},{"text":"4.39.1","noFixRecorded":false,"fixedIn":null},{"text":"4.38.1","noFixRecorded":false,"fixedIn":null},{"text":"≥ 4.33.0, < unspecified","noFixRecorded":false,"fixedIn":null},{"text":"4.32.1","noFixRecorded":false,"fixedIn":null},{"text":"≥ 4.9.0, < unspecified","noFixRecorded":false,"fixedIn":null},{"text":"4.8.7","noFixRecorded":false,"fixedIn":null},{"text":"≥ unspecified, ≤ 4.8.6","noFixRecorded":false,"fixedIn":null},{"text":"< 4.8.7","noFixRecorded":false,"fixedIn":null},{"text":"≥ 4.9.0, ≤ 4.32.0","noFixRecorded":false,"fixedIn":null},{"text":"≥ 4.33.0, ≤ 4.38.0","noFixRecorded":false,"fixedIn":null},{"text":"4.39.0","noFixRecorded":false,"fixedIn":null},{"text":"4.40.0","noFixRecorded":false,"fixedIn":null},{"text":"4.41.0","noFixRecorded":false,"fixedIn":null},{"text":"4.42.0","noFixRecorded":false,"fixedIn":null},{"text":"4.43.0","noFixRecorded":false,"fixedIn":null},{"text":"4.44.0","noFixRecorded":false,"fixedIn":null},{"text":"4.45.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"4.45.1 | 4.44.1 | 4.43.1 | 4.42.1 | 4.41.1 | 4.40.1 | 4.39.1 | 4.38.1 | ≥ 4.33.0, < unspecified | 4.32.1 | ≥ 4.9.0, < unspecified | 4.8.7 | ≥ unspecified, ≤ 4.8.6 | < 4.8.7 | ≥ 4.9.0, ≤ 4.32.0 | ≥ 4.33.0, ≤ 4.38.0 | 4.39.0 | 4.40.0 | 4.41.0 | 4.42.0 | 4.43.0 | 4.44.0 | 4.45.0","eol":null,"hubHref":"/vendor/facebook/hhvm"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/facebook/hhvm/commit/b3679121bb3c7017ff04b4c08402ffff5cf59b13","label":"github.com/facebook/hhvm/commit/b3679121bb3c7017ff04b4c08402ffff5cf59b13","hostname":"github.com","tags":["X Refsource CONFIRM","REPORT","Patch"]},{"url":"https://hhvm.com/blog/2020/02/20/security-update.html","label":"hhvm.com/blog/2020/02/20/security-update.html","hostname":"hhvm.com","tags":["X Refsource CONFIRM","REPORT","Vendor Advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-1888","label":"ubuntu.com/security/CVE-2020-1888","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-1888","label":"www.cve.org/CVERecord?id=CVE-2020-1888","hostname":"www.cve.org","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2020-03-03T15:00:25.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-04T06:53:59.615Z","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":"2026-10-21T23:12:19.183Z","stale":false,"partial":false}}