CVE-2021-42340
DoS via memory leak with WebSocket connections
At a glance Severity Not available EPSS EPSS 11.80 % · percentile 96 (2026-10-27) State PUBLISHED Published 2021-10-14 Updated 2024-08-04 Assigner apache NVD status Modified 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.
Scores Version Score Vector Scored by CVSS 3.1 HIGH 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H NVD · nvd@nist.gov (Primary) CVSS 2.0 MEDIUM 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P NVD · nvd@nist.gov (Primary)
Weaknesses (CWE)
Advisories
European references
CERT-FR advisories
Affected configurations (NVD CPE) cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* ≥ 8.5.60 < 8.5.72cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* ≥ 9.0.40 < 9.0.54cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* ≥ 10.0.1 < 10.0.12cpe:2.3:a:apache:tomcat:10.0.0:milestone10:*:*:*:*:*:*cpe:2.3:a:apache:tomcat:10.1.0:milestone1:*:*:*:*:*:*cpe:2.3:a:apache:tomcat:10.1.0:milestone2:*:*:*:*:*:*cpe:2.3:a:apache:tomcat:10.1.0:milestone3:*:*:*:*:*:*cpe:2.3:a:apache:tomcat:10.1.0:milestone4:*:*:*:*:*:*cpe:2.3:a:apache:tomcat:10.1.0:milestone5:*:*:*:*:*:*cpe:2.3:a:netapp:hci:-:*:*:*:*:*:*:*cpe:2.3:a:netapp:management_services_for_element_software:-:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:agile_engineering_data_management:6.2.1.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:big_data_spatial_and_graph:*:*:*:*:*:*:*:* < 23.1cpe:2.3:a:oracle:communications_diameter_signaling_router:*:*:*:*:*:*:*:* ≥ 8.0.0.0 ≤ 8.5.0.2cpe:2.3:a:oracle:hospitality_cruise_shipboard_property_management_system:20.1.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:managed_file_transfer:12.2.1.3.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:managed_file_transfer:12.2.1.4.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:middleware_common_libraries_and_tools:12.2.1.4.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:payment_interface:19.1:*:*:*:*:*:*:*cpe:2.3:a:oracle:payment_interface:20.3:*:*:*:*:*:*:*cpe:2.3:a:oracle:retail_customer_insights:15.0.2:*:*:*:*:*:*:*cpe:2.3:a:oracle:retail_customer_insights:16.0.2:*:*:*:*:*:*:*cpe:2.3:a:oracle:retail_data_extractor_for_merchandising:15.0.2:*:*:*:*:*:*:*cpe:2.3:a:oracle:retail_data_extractor_for_merchandising:16.0.2:*:*:*:*:*:*:*cpe:2.3:a:oracle:retail_eftlink:21.0.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:retail_financial_integration:16.0.1:*:*:*:*:*:*:*cpe:2.3:a:oracle:retail_financial_integration:19.0.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:retail_store_inventory_management:14.0.4.13:*:*:*:*:*:*:*cpe:2.3:a:oracle:retail_store_inventory_management:14.1.3.5:*:*:*:*:*:*:*cpe:2.3:a:oracle:retail_store_inventory_management:14.1.3.14:*:*:*:*:*:*:*cpe:2.3:a:oracle:retail_store_inventory_management:15.0.3.3:*:*:*:*:*:*:*cpe:2.3:a:oracle:retail_store_inventory_management:15.0.3.8:*:*:*:*:*:*:*cpe:2.3:a:oracle:retail_store_inventory_management:16.0.3.7:*:*:*:*:*:*:*cpe:2.3:a:oracle:sd-wan_edge:9.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:sd-wan_edge:9.1:*:*:*:*:*:*:*cpe:2.3:a:oracle:taleo_platform:*:*:*:*:*:*:*:*Affected products Product Versions Apache Software Foundation · Apache Tomcat affected Apache Tomcat 10 10.0.0-M10 to 10.0.11 ; affected Apache Tomcat 10 10.1.0-M1 to 10.1.0-M5 ; affected Apache Tomcat 9 9.0.40 to 9.0.53 ; affected Apache Tomcat 8 8.5.60 to 8.5.71
References
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