ClickHouse LZ4 Compression Codec LZ4::decompressImpl heap-based overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.1$0-$5k0.00

Summaryinfo

A vulnerability was found in ClickHouse. It has been classified as critical. This issue affects the function LZ4::decompressImpl of the component LZ4 Compression Codec. Performing a manipulation results in heap-based overflow. This vulnerability was named CVE-2021-43305. There is no available exploit.

Detailsinfo

A vulnerability classified as critical has been found in ClickHouse (unknown version). This affects the function LZ4::decompressImpl of the component LZ4 Compression Codec. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability.

The weakness was presented 03/15/2022. The advisory is shared at jfrog.com. This vulnerability is uniquely identified as CVE-2021-43305 since 11/03/2021. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 216691 (ClickHouse < 21.10.2.15 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (216691). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 7.1

VulDB Base Score: 5.5
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 216691
Nessus Name: ClickHouse < 21.10.2.15 Multiple Vulnerabilities

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/03/2021 🔍
03/15/2022 +132 days 🔍
03/15/2022 +0 days 🔍
06/25/2025 +1198 days 🔍

Sourcesinfo

Advisory: jfrog.com
Status: Not defined

CVE: CVE-2021-43305 (🔍)
GCVE (CVE): GCVE-0-2021-43305
GCVE (VulDB): GCVE-100-194913

Entryinfo

Created: 03/15/2022 08:06
Updated: 06/25/2025 23:29
Changes: 03/15/2022 08:06 (36), 03/16/2022 15:54 (1), 03/16/2022 16:00 (1), 02/24/2025 21:56 (16), 06/25/2025 23:29 (19)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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