{"id":"DEBIAN-CVE-2021-43304","details":"Heap buffer overflow in Clickhouse's LZ4 compression codec when parsing a malicious query. There is no verification that the copy operations in the LZ4::decompressImpl loop and especially the arbitrary copy operation wildCopy\u003ccopy_amount\u003e(op, ip, copy_end), don’t exceed the destination buffer’s limits.","modified":"2026-09-15T09:02:30.192333311Z","published":"2022-03-14T23:15:08.157Z","upstream":["CVE-2021-43304"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2021-43304"}],"affected":[{"package":{"name":"clickhouse","ecosystem":"Debian:12","purl":"pkg:deb/debian/clickhouse?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"18.16.1+ds-7.3"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-43304.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}