{"id":"CVE-2021-42391","aliases":["EUVD-2021-29362","GHSA-rfqp-qc69-jhvm"],"status":"published","title":"Divide-by-zero in Clickhouse's Gorilla compression codec when parsing a malicious query. The...","description":"Divide-by-zero in Clickhouse's Gorilla compression codec when parsing a malicious query. The first byte of the compressed buffer is used in a modulo operation without being checked for 0.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01373,"percentile":0.72183,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-369"],"published":"2022-03-14T22:20:33Z","modified":"2026-10-24T10:30:54Z","products":[{"vendor":"clickhouse","product":"clickhouse"},{"vendor":"yandex","product":"clickhouse"}],"references":[{"url":"https://jfrog.com/blog/7-rce-and-dos-vulnerabilities-found-in-clickhouse-dbms","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-42391"},{"url":"https://github.com/advisories/GHSA-rfqp-qc69-jhvm"}],"sources":{"cve":[{"id":"CVE-2021-42391","description":"Divide-by-zero in Clickhouse's Gorilla compression codec when parsing a malicious query. The first byte of the compressed buffer is used in a modulo operation without being checked for 0.","status":"published","published":"2022-03-14T22:20:33Z","modified":"2024-08-04T03:30:38.353Z","cwes":["CWE-369"],"updated_at":"2026-11-02T14:32:58.739039Z"}],"euvd":[{"id":"EUVD-2021-29362","description":"Divide-by-zero in Clickhouse's Gorilla compression codec when parsing a malicious query. The first byte of the compressed buffer is used in a modulo operation without being checked for 0.","status":"published","published":"2022-03-14T22:20:33Z","modified":"2024-08-04T03:30:38Z","updated_at":"2026-11-03T03:24:15.755984Z"}],"ghsa":[{"id":"GHSA-rfqp-qc69-jhvm","title":"Divide-by-zero in Clickhouse's Gorilla compression codec when parsing a malicious query. The...","description":"Divide-by-zero in Clickhouse's Gorilla compression codec when parsing a malicious query. The first byte of the compressed buffer is used in a modulo operation without being checked for 0.","status":"published","published":"2022-03-16T00:00:49Z","modified":"2023-01-27T05:00:43Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-369"],"updated_at":"2026-11-02T14:41:44.25061Z"}],"nvd":[{"id":"CVE-2021-42391","description":"Divide-by-zero in Clickhouse's Gorilla compression codec when parsing a malicious query. The first byte of the compressed buffer is used in a modulo operation without being checked for 0.","status":"published","published":"2022-03-14T23:15:08.113Z","modified":"2026-06-17T04:09:45.29Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-369"],"updated_at":"2026-11-02T14:07:05.198719Z"}],"osv":[{"id":"CVE-2021-42391","description":"Divide-by-zero in Clickhouse's Gorilla compression codec when parsing a malicious query. The first byte of the compressed buffer is used in a modulo operation without being checked for 0.","status":"published","published":"2022-03-14T23:15:08.113Z","modified":"2026-10-24T10:30:54.996886879Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:21.557945Z"}]}}