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CVE-2021-42340

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Date: October 14, 2021

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.

Language: Java

Severity Score

Related Resources (23)

https://kc.mcafee.com/corporate/index?page=content&id=SB10379
https://security.netapp.com/advisory/ntap-20211104-0001/
https://lists.apache.org/thread.html/r83a35be60f06aca2065f188ee542b9099695d57ced2e70e0885f905c%40%3Cannounce.tomcat.apache.org%3E
https://tomcat.apache.org/security-8.html
https://tomcat.apache.org/security-10.html
https://security.gentoo.org/glsa/202208-34
https://access.redhat.com/security/cve/CVE-2021-42340
https://security.netapp.com/advisory/ntap-20211104-0001
https://github.com/apache/tomcat/commit/31d62426645824bdfe076a0c0eafa904d90b4fb9
https://github.com/apache/tomcat/commit/d27535bdee95d252418201eb21e9d29476aa6b6a
https://lists.apache.org/thread.html/r8097a2d1550aa78e585fc77e602b9046e6d4099d8d132497c5387784%40%3Ccommits.myfaces.apache.org%3E
https://github.com/apache/tomcat
https://www.oracle.com/security-alerts/cpujan2022.html
https://tomcat.apache.org/security-9.html
https://github.com/apache/tomcat/commit/d5a6660cba7f51589468937bf3bbad4db7810371
https://github.com/apache/tomcat/commit/80f1438ec45e77a07b96419808971838d259eb47
https://lists.apache.org/thread.html/r8097a2d1550aa78e585fc77e602b9046e6d4099d8d132497c5387784@%3Ccommits.myfaces.apache.org%3E
https://www.oracle.com/security-alerts/cpuapr2022.html
https://nvd.nist.gov/vuln/detail/CVE-2021-42340
https://www.oracle.com/security-alerts/cpujul2022.html
https://security-tracker.debian.org/tracker/CVE-2021-42340
https://www.debian.org/security/2021/dsa-5009
https://www.mend.io/vulnerability-database/CVE-2021-42340

Severity Score

Weakness Type (CWE)

Missing Release of Resource after Effective Lifetime

CWE-772

Top Fix

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Upgrade Version

Upgrade to version org.apache.tomcat:tomcat:10.1.0-M6;org.apache.tomcat:tomcat:10.0.12;org.apache.tomcat:tomcat:9.0.54;org.apache.tomcat:tomcat:8.5.72

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CVSS v3.1

Base Score:
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

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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