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.

The version of ClickHouse installed on the remote host is prior to 21.10.2.15. It is, therefore, affected by multiple vulnerabilities.

  - Heap out-of-bounds read vulnerability 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. (CVE-2021-42387, CVE-2021-42388)   
  - Divide-by-zero in multiple Clickhouse's compression codecs when parsing a malicious query. The first byte of the     compressed buffer is used in a modulo operation without being checked for 0. (CVE-2021-42389, CVE-2021-42390, CVE-2021-42391)

  - 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<copy_amount>(op, ip, copy_end), don’t exceed the destination buffer’s limits. (CVE-2021-43304, CVE-2021-43305)


Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Ubuntu 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6933-1 advisory.

    It was discovered that ClickHouse incorrectly handled memory, leading to a heap out-of-bounds data read.
    An attacker could possibly use this issue to cause a denial of service, or leak sensitive information.
    (CVE-2021-42387, CVE-2021-41388)

    It was discovered that ClickHouse incorrectly handled memory, leading to a heap-based buffer overflow. An     attacker could possibly use this issue to cause a denial of service, or execute arbitrary code.
    (CVE-2021-43305)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3176 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-3176-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                         Tobias Frost     November 03, 2022                             https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : clickhouse     Version        : 18.16.1+ds-4+deb10u1     CVE ID         : CVE-2021-42387 CVE-2021-42388 CVE-2021-43304 CVE-2021-43305     Debian Bug     : 1008216

    Several security vulnerabilities were discovered in clickhouse, a     column-oriented database system.

    The vulnerabilities require authentication, but can be triggered by any user     with read permissions. This means the attacker must perform reconnaissance on     the specific ClickHouse server target to obtain valid credentials. Any set of     credentials would do, since even a user with the lowest privileges can trigger     all of the vulnerabilities. By triggering the vulnerabilities, an attacker can     crash the ClickHouse server, leak memory contents or even cause remote code     execution.

    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.


    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.


    CVE-2021-43304:
      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<copy_amount>(op, ip,       copy_end), don&#8217;t exceed the destination buffer&#8217;s       limits.

    CVE-2021-43305:
      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<copy_amount>(op, ip,       copy_end), don&#8217;t exceed the destination buffer&#8217;s       limits. This issue is very similar to CVE-2021-43304, but the       vulnerable copy operation is in a different wildCopy call.

    For Debian 10 buster, these problems have been fixed in version     18.16.1+ds-4+deb10u1.

    We recommend that you upgrade your clickhouse packages.

    For the detailed security status of clickhouse please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/clickhouse

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS     Attachment:
    signature.asc     Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
216691	ClickHouse < 21.10.2.15 Multiple Vulnerabilities	Nessus	Misc.	high
204921	Ubuntu 20.04 LTS : ClickHouse vulnerabilities (USN-6933-1)	Nessus	Ubuntu Local Security Checks	high
167202	Debian dla-3176 : clickhouse-client - security update	Nessus	Debian Local Security Checks	high

Detections

Analytics

CVE-2021-42388

high

Tenable Plugins

high

high

high