What is CVE-2021-40865?

CVE-2021-40865 is a critical-severity vulnerability in Apache Storm, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2021-10-25.

How severe is CVE-2021-40865?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-40865 known to be exploited?

8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Deserialization in Apache Storm

CVE-2021-40865

An Unsafe Deserialization vulnerability exists in the worker services of the Apache Storm supervisor server allowing pre-auth Remote Code Execution (RCE). Apache Storm 2.2.x users should upgrade to version 2.2.1 or 2.3.0. Apache Storm 2.1.x users should upgrade to version 2.1.1. Apache Storm 1.x users should upgrade to version 1.2.4

Vulnerability class: Insecure Deserialization

EPSS: 0.656 (99.2th percentile) — read the EPSS interpretation.

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.

Affected products

Apache Storm
Apache Software Foundation Storm — versions v1.0.0, Apache Storm

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

References

security@apache.org (Mailing List, x_refsource_MISC, Vendor Advisory)
security@apache.org (Mailing List, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-40865?: CVE-2021-40865 is a critical-severity vulnerability in Apache Storm, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2021-10-25.
How severe is CVE-2021-40865?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-40865 known to be exploited?: 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.