PT-2019-14693 · Yandex+1 · Clickhouse+1

Eldar Zaitov · CVE-2019-16535 · Published 2019-11-12 · Updated 2025-06-25

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions ClickHouse versions prior to 19.14

Description The issue concerns an out-of-bounds (OOB) read, OOB write, and integer underflow in decompression algorithms. This can be exploited to achieve remote code execution (RCE) or cause a denial of service (DoS) via the native protocol.

Recommendations For versions prior to 19.14, update to version 19.14 or later to resolve the issue. As a temporary workaround, consider restricting access to the native protocol to minimize the risk of exploitation.

Fix

RCE

DoS

Integer Underflow

Memory Corruption

Out of bounds Read

Weakness Enumeration

CWE-191

CWE-787

CWE-125

Related Identifiers

ALT-PU-2019-3124

CVE-2019-16535

Affected Products

Alt Linux

Clickhouse

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2019-16535 · Security Note
• https://clickhouse.yandex/docs/en/security_changelog · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-16535 · Vendor Advisory
• https://t.me/cvenotify/126693 · Telegram Post
• https://t.me/webpwn/260 · Telegram Post