UBUNTU-CVE-2021-43305 (CVE-2021-43305)

Vulnerability from osv_ubuntu – Published: 2022-03-14 23:15 – Updated: 2025-09-08 16:47 – Source website
VLAI
Details

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(op, ip, copy_end), don’t exceed the destination buffer’s limits. This issue is very similar to CVE-2021-43304, but the vulnerable copy operation is in a different wildCopy call.

Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "clickhouse-client",
            "binary_version": "18.16.1+ds-7ubuntu0.1"
          },
          {
            "binary_name": "clickhouse-common",
            "binary_version": "18.16.1+ds-7ubuntu0.1"
          },
          {
            "binary_name": "clickhouse-server",
            "binary_version": "18.16.1+ds-7ubuntu0.1"
          },
          {
            "binary_name": "clickhouse-tools",
            "binary_version": "18.16.1+ds-7ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "clickhouse",
        "purl": "pkg:deb/ubuntu/clickhouse@18.16.1+ds-7ubuntu0.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "18.16.1+ds-7ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "18.16.1+ds-5",
        "18.16.1+ds-5ubuntu1",
        "18.16.1+ds-5ubuntu2",
        "18.16.1+ds-6ubuntu1",
        "18.16.1+ds-7"
      ]
    }
  ],
  "aliases": [],
  "details": "Heap buffer overflow in Clickhouse\u0027s 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\u003ccopy_amount\u003e(op, ip, copy_end), don\u2019t exceed the destination buffer\u2019s limits. This issue is very similar to CVE-2021-43304, but the vulnerable copy operation is in a different wildCopy call.",
  "id": "UBUNTU-CVE-2021-43305",
  "modified": "2025-09-08T16:47:24Z",
  "published": "2022-03-14T23:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-43305"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/ClickHouse/ClickHouse/commit/2aea1c8d4a5be320365472052d8a48bf69fd9fe9"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/ClickHouse/ClickHouse/commit/6d83eacec42c7c403c99804a713a9d38caa4a45d"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/ClickHouse/ClickHouse/pull/27136"
    },
    {
      "type": "REPORT",
      "url": "https://jfrog.com/blog/7-rce-and-dos-vulnerabilities-found-in-clickhouse-dbms/"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-43305"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6933-1"
    }
  ],
  "related": [
    "USN-6933-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-43305"
  ]
}



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