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CVE-2020-13934

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Date: July 14, 2020

An h2c direct connection to Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M5 to 9.0.36 and 8.5.1 to 8.5.56 did not release the HTTP/1.1 processor after the upgrade to HTTP/2. If a sufficient number of such requests were made, an OutOfMemoryException could occur leading to a denial of service.

Language: Java

Severity Score

Severity Score

Weakness Type (CWE)

Buffer Errors

CWE-119

NULL Pointer Dereference

CWE-476

Missing Release of Memory after Effective Lifetime

CWE-401

Top Fix

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Upgrade Version

Upgrade to version org.apache.tomcat:tomcat-coyote:8.5.57,9.0.37,10.0.0-M7

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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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