Cyber Resilience

CVE-2021-30640

Medium

Published: 12 July 2021

Published
12 July 2021
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
EPSS Score 0.0012 31.0th percentile
Risk Priority 13 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-30640 is a medium-severity Improper Encoding or Escaping of Output (CWE-116) vulnerability in Apache Tomcat. Its CVSS base score is 6.5 (Medium).

Operationally, ranked at the 31.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

A vulnerability in the JNDI Realm of Apache Tomcat allows an attacker to authenticate using variations of a valid user name and/or to bypass some of the protection provided by the LockOut Realm. This issue affects Apache Tomcat 10.0.0-M1 to…

more

10.0.5; 9.0.0.M1 to 9.0.45; 8.5.0 to 8.5.65.

CWE(s)
CWE-116

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

apache
tomcat
7.0.0 — 7.0.109 · 8.5.0 — 8.5.66 · 9.0.0 — 9.0.46
oracle
communications cloud native core policy
1.14.0
oracle
communications diameter signaling router
8.0.0 — 8.5.0
oracle
communications pricing design center
12.0.0.3.0
oracle
hospitality cruise shipboard property management system
20.1.0
oracle
tekelec platform distribution
7.4.0 — 7.7.1
debian
debian linux
10.0, 11.0, 9.0

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-15 Information Output Filtering
addresses: CWE-116

Validating that output matches expected content directly mitigates failures to properly encode or escape data for its destination context.

References