CVE-2021-43304

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<copy_amount>(op, ip, copy_end), don’t exceed the destination buffer’s limits.

CVSS v3.1

8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0

6.5 MEDIUMAV:N/AC:L/Au:S/C:P/I:P/A:P

EPSS

1.67% chance of exploitation in the next 30 days, 75th percentile

Published

2022-03-14

Updated

2024-08-04

Proof-of-concept exploits (1)

• https://jfrog.com/blog/7-rce-and-dos-vulnerabilities-found-in-clickhouse-dbms

References

• CVE Record
• NVD entry

Related

• CVE-2021-43297
• CVE-2021-43305
• CVE-2021-43290
• CVE-2021-43306
• CVE-2021-43289
• CVE-2021-43307