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Improper Restriction of Operations within the Bounds of a Memory Buffer in Apache Tomcat

High severity GitHub Reviewed Published May 14, 2022 to the GitHub Advisory Database • Updated Oct 15, 2024

Package

maven org.apache.tomcat:tomcat (Maven)

Affected versions

>= 9.0.0.M1, <= 9.0.0.M11
>= 8.5.0, < 8.5.8

Patched versions

9.0.0.M12
8.5.8

Description

The HTTP/2 header parser in Apache Tomcat 9.0.0.M1 to 9.0.0.M11 and 8.5.0 to 8.5.6 entered an infinite loop if a header was received that was larger than the available buffer. This made a denial of service attack possible.

References

Published by the National Vulnerability Database Aug 10, 2017
Published to the GitHub Advisory Database May 14, 2022
Reviewed Jul 6, 2022
Last updated Oct 15, 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

2.222%
(90th percentile)

Weaknesses

CVE ID

CVE-2016-6817

GHSA ID

GHSA-698c-2x4j-g9gq

Source code

Credits

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