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Improper Resource Shutdown or Release in Apache Tomcat

High severity GitHub Reviewed Published May 13, 2022 to the GitHub Advisory Database • Updated Feb 22, 2024

Package

maven org.apache.tomcat:tomcat (Maven)

Affected versions

>= 9.0.0.M1, <= 9.0.0.M18
>= 8.5.0, <= 8.5.12

Patched versions

9.0.0.M19
8.5.13

Description

In Apache Tomcat 9.0.0.M1 to 9.0.0.M18 and 8.5.0 to 8.5.12, the handling of an HTTP/2 GOAWAY frame for a connection did not close streams associated with that connection that were currently waiting for a WINDOW_UPDATE before allowing the application to write more data. These waiting streams each consumed a thread. A malicious client could therefore construct a series of HTTP/2 requests that would consume all available processing threads.

References

Published by the National Vulnerability Database Apr 17, 2017
Published to the GitHub Advisory Database May 13, 2022
Reviewed Jul 1, 2022
Last updated Feb 22, 2024

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS score

63.560%
(98th percentile)

Weaknesses

CVE ID

CVE-2017-5650

GHSA ID

GHSA-9785-w233-x6hv

Source code

Credits

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