Auth bypass in Apache Hadoop

CVE-2020-9492

In Apache Hadoop 3.2.0 to 3.2.1, 3.0.0-alpha1 to 3.1.3, and 2.0.0-alpha to 2.10.0, WebHDFS client might send SPNEGO authorization header to remote URL without proper verification.

Vulnerability class: Broken Access Control

EPSS: 0.044 (90.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2020-9492?
CVE-2020-9492 is a high-severity vulnerability in Apache Hadoop, classified under Incorrect Authorization. CVSS score: 8.8/10. Published 2021-01-26.
How severe is CVE-2020-9492?
High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2020-9492 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.