Out-of-bounds Read in Clickhouse

CVE-2019-16535

In all versions of ClickHouse before 19.14, an OOB read, OOB write and integer underflow in decompression algorithms can be used to achieve RCE or DoS via native protocol.

Vulnerability class: Buffer Overflow

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.017 (76.2th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2019-16535: held from 0.017 to 0.017.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

  • Clickhouse
  • Clickhouse — versions All versions prior to version 19.14.

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2019-16535?
CVE-2019-16535 is a critical-severity vulnerability in Clickhouse, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 2019-12-30.
How severe is CVE-2019-16535?
Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2019-16535 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.