CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:P/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
EPSS
Percentile
40.3%
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.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 20.04 | noarch | clickhouse | < any | UNKNOWN |
ubuntu | 24.04 | noarch | clickhouse | < any | UNKNOWN |
github.com/ClickHouse/ClickHouse/commit/2aea1c8d4a5be320365472052d8a48bf69fd9fe9 (v21.9.1.7685)
github.com/ClickHouse/ClickHouse/commit/6d83eacec42c7c403c99804a713a9d38caa4a45d (v21.9.1.7685)
github.com/ClickHouse/ClickHouse/pull/27136
jfrog.com/blog/7-rce-and-dos-vulnerabilities-found-in-clickhouse-dbms/
launchpad.net/bugs/cve/CVE-2021-42388
nvd.nist.gov/vuln/detail/CVE-2021-42388
security-tracker.debian.org/tracker/CVE-2021-42388
www.cve.org/CVERecord?id=CVE-2021-42388
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:P/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
EPSS
Percentile
40.3%