Authenticated code execution via unchecked LZ4 copy
Published Mar 14, 2022 · Updated Aug 4, 2024
Heap-based buffer overflow in ClickHouse before 21.10.2.15-stable allows remote authenticated users to corrupt server memory via a malicious query. LZ4::decompressImpl passes an attacker-controlled copy endpoint to wildCopy without limiting it to the destination buffer. A low-privileged database account and network access to a query interface are sufficient; exploitation can crash the server or execute code in its process.
Summary
What happened
Heap-based buffer overflow in ClickHouse before 21.10.2.15-stable allows remote authenticated users to corrupt server memory via a malicious query. LZ4::decompressImpl passes an attacker-controlled copy endpoint to wildCopy without limiting it to the destination buffer. A low-privileged database account and network access to a query interface are sufficient; exploitation can crash the server or execute code in its process.
The record
- CVE
- CVE-2021-43305
- Published
- Mar 14, 2022
- Updated
- Aug 4, 2024
- Vendor
- ClickHouse
- Product
- ClickHouse
- Classifications
- CWE-122, CWE-787, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 14, 2022CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <21.10.2.15-stable
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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