title_wip

Credits: JFrog Security Research Team

### CVE-2021-42387[​](#cve-2021-42387 "Direct link to CVE-2021-42387")

Heap out-of-bounds read in ClickHouse's LZ4 compression codec when parsing a malicious query. As part of the LZ4::decompressImpl() loop, a 16-bit unsigned user-supplied value ('offset') is read from the compressed data. The offset is later used in the length of a copy operation, without checking the upper bounds of the source of the copy operation.

Credits: JFrog Security Research Team

### CVE-2021-42388[​](#cve-2021-42388 "Direct link to CVE-2021-42388")

Heap out-of-bounds read in ClickHouse's LZ4 compression codec when parsing a malicious query. As part of the LZ4::decompressImpl() loop, a 16-bit unsigned user-supplied value ('offset') is read from the compressed data. The offset is later used in the length of a copy operation, without checking the lower bounds of the source of the copy operation.

Credits: JFrog Security Research Team

### CVE-2021-42389[​](#cve-2021-42389 "Direct link to CVE-2021-42389")

Divide-by-zero in ClickHouse's Delta 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.

Credits: JFrog Security Research Team

### CVE-2021-42390[​](#cve-2021-42390 "Direct link to CVE-2021-42390")

Divide-by-zero in ClickHouse's DeltaDouble 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.

Credits: JFrog Security Research Team

### CVE-2021-42391[​](#cve-2021-42391 "Direct link to CVE-2021-42391")

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.

Credits: JFrog Security Research Team

## Fixed in ClickHouse 21.4.3.21, 2021-04-12[​](#fixed-in-clickhouse-release-21-4-3-21-2021-04-12 "Direct link to Fixed in ClickHouse 21.4.3.21, 2021-04-12")

### CVE-2021-25263[​](#cve-2021-25263 "Direct link to CVE-2021-25263")

An attacker that has CREATE DICTIONARY privilege, can read arbitary file outside permitted directory.

Fix has been pushed to versions 20.8.18.32-lts, 21.1.9.41-stable, 21.2.9.41-stable, 21.3.6.55-lts, 21.4.3.21-stable and later.

Credits: [Vyacheslav Egoshin](https://twitter.com/vegoshin)

## Fixed in ClickHouse Release 19.14.3.3, 2019-09-10[​](#fixed-in-clickhouse-release-19-14-3-3-2019-09-10 "Direct link to Fixed in ClickHouse Release 19.14.3.3, 2019-09-10")

### CVE-2019-15024[​](#cve-2019-15024 "Direct link to CVE-2019-15024")

Аn attacker that has write access to ZooKeeper and who can run a custom server available from the network where ClickHouse runs, can create a custom-built malicious server that will act as a ClickHouse replica and register it in ZooKeeper. When another replica will fetch data part from the malicious replica, it can force clickhouse-server to write to arbitrary path on filesystem.

Credits: Eldar Zaitov of Yandex Information Security Team

### CVE-2019-16535[​](#cve-2019-16535 "Direct link to CVE-2019-16535")

Аn OOB read, OOB write and integer underflow in decompression algorithms can be used to achieve RCE or DoS via native protocol.

Credits: Eldar Zaitov of Yandex Information Security Team

### CVE-2019-16536[​](#cve-2019-16536 "Direct link to CVE-2019-16536")

Stack overflow leading to DoS can be triggered by a malicious authenticated client.

Credits: Eldar Zaitov of Yandex Information Security Team

## Fixed in ClickHouse Release 19.13.6.1, 2019-09-20[​](#fixed-in-clickhouse-release-19-13-6-1-2019-09-20 "Direct link to Fixed in ClickHouse Release 19.13.6.1, 2019-09-20")

### CVE-2019-18657[​](#cve-2019-18657 "Direct link to CVE-2019-18657")

Table function `url` had the vulnerability allowed the attacker to inject arbitrary HTTP headers in the request.

Credits: [Nikita Tikhomirov](https://github.com/NSTikhomirov)

## Fixed in ClickHouse Release 18.12.13, 2018-09-10[​](#fixed-in-clickhouse-release-18-12-13-2018-09-10 "Direct link to Fixed in ClickHouse Release 18.12.13, 2018-09-10")

### CVE-2018-14672[​](#cve-2018-14672 "Direct link to CVE-2018-14672")

Functions for loading CatBoost models allowed path traversal and reading arbitrary files through error messages.

Credits: Andrey Krasichkov of Yandex Information Security Team

## Fixed in ClickHouse Release 18.10.3, 2018-08-13[​](#fixed-in-clickhouse-release-18-10-3-2018-08-13 "Direct link to Fixed in ClickHouse Release 18.10.3, 2018-08-13")

### CVE-2018-14671[​](#cve-2018-14671 "Direct link to CVE-2018-14671")

unixODBC allowed loading arbitrary shared objects from the file system which led to a Remote Code Execution vulnerability.

Credits: Andrey Krasichkov and Evgeny Sidorov of Yandex Information Security Team

## Fixed in ClickHouse Release 1.1.54388, 2018-06-28[​](#fixed-in-clickhouse-release-1-1-54388-2018-06-28 "Direct link to Fixed in ClickHouse Release 1.1.54388, 2018-06-28")

### CVE-2018-14668[​](#cve-2018-14668 "Direct link to CVE-2018-14668")

"remote" table function allowed arbitrary symbols in "user", "password" and "default\_database" fields which led to Cross Protocol Request Forgery Attacks.

Credits: Andrey Krasichkov of Yandex Information Security Team

## Fixed in ClickHouse Release 1.1.54390, 2018-07-06[​](#fixed-in-clickhouse-release-1-1-54390-2018-07-06 "Direct link to Fixed in ClickHouse Release 1.1.54390, 2018-07-06")

### CVE-2018-14669[​](#cve-2018-14669 "Direct link to CVE-2018-14669")

ClickHouse MySQL client had "LOAD DATA LOCAL INFILE" functionality enabled that allowed a malicious MySQL database read arbitrary files from the connected ClickHouse server.

Credits: Andrey Krasichkov and Evgeny Sidorov of Yandex Information Security Team

## Fixed in ClickHouse Release 1.1.54131, 2017-01-10[​](#fixed-in-clickhouse-release-1-1-54131-2017-01-10 "Direct link to Fixed in ClickHouse Release 1.1.54131, 2017-01-10")

### CVE-2018-14670[​](#cve-2018-14670 "Direct link to CVE-2018-14670")

Incorrect configuration in deb package could lead to the unauthorized use of the database.

Credits: the UK's National Cyber Security Centre (NCSC)