Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
None
Attack Vector
Network
0

CVE-2021-42340

Disclosure Date: October 14, 2021 •
CVE-2021-42340 CVSS v3 Base Score: 7.5
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

The fix for bug 63362 present in Apache Tomcat 10.1.0-M1 to 10.1.0-M5, 10.0.0-M1 to 10.0.11, 9.0.40 to 9.0.53 and 8.5.60 to 8.5.71 introduced a memory leak. The object introduced to collect metrics for HTTP upgrade connections was not released for WebSocket connections once the connection was closed. This created a memory leak that, over time, could lead to a denial of service via an OutOfMemoryError.

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CVSS V3 Severity and Metrics
Base Score:
7.5 High
Impact Score:
3.6
Exploitability Score:
3.9
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
None
Availability (A):
High

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
Apache Tomcat 10.0.0-M10 to 10.0.11
Apache Tomcat 10.1.0-M1 to 10.1.0-M5
Apache Tomcat 9.0.40 to 9.0.53
Apache Tomcat 8.5.60 to 8.5.71
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • apache,
  • debian,
  • netapp,
  • oracle

Products

  • agile engineering data management 6.2.1.0,
  • big data spatial and graph,
  • communications diameter signaling router,
  • debian linux 11.0,
  • hci -,
  • hospitality cruise shipboard property management system 20.1.0,
  • managed file transfer 12.2.1.3.0,
  • managed file transfer 12.2.1.4.0,
  • management services for element software -,
  • middleware common libraries and tools 12.2.1.4.0,
  • payment interface 19.1,
  • payment interface 20.3,
  • retail customer insights 15.0.2,
  • retail customer insights 16.0.2,
  • retail data extractor for merchandising 15.0.2,
  • retail data extractor for merchandising 16.0.2,
  • retail eftlink 21.0.0,
  • retail financial integration 16.0.1,
  • retail financial integration 19.0.0,
  • retail store inventory management 14.0.4.13,
  • retail store inventory management 14.1.3.14,
  • retail store inventory management 14.1.3.5,
  • retail store inventory management 15.0.3.3,
  • retail store inventory management 15.0.3.8,
  • retail store inventory management 16.0.3.7,
  • sd-wan edge 9.0,
  • sd-wan edge 9.1,
  • taleo platform,
  • tomcat,
  • tomcat 10.0.0,
  • tomcat 10.1.0
Technical Analysis