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OutOfMemory Exception by specifically crafted processing instruction in NekoHtml Parser

High severity GitHub Reviewed Published Apr 24, 2022 in HtmlUnit/htmlunit-neko • Updated Jan 27, 2023

Package

maven net.sourceforge.htmlunit:neko-htmlunit (Maven)

Affected versions

< 2.61.0

Patched versions

2.61.0

Description

Impact

NekoHtml Parser suffers from a denial of service vulnerability on versions 2.60.0 and below. A specifically crafted input regarding the parsing of processing instructions leads to heap memory consumption. Please update to version 2.61.0.

For more information

If you have any questions or comments about this advisory:

References

@rbri rbri published to HtmlUnit/htmlunit-neko Apr 24, 2022
Published by the National Vulnerability Database Apr 25, 2022
Published to the GitHub Advisory Database Apr 26, 2022
Reviewed Apr 26, 2022
Last updated Jan 27, 2023

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS score

0.086%
(38th percentile)

Weaknesses

CVE ID

CVE-2022-29546

GHSA ID

GHSA-6jmm-mp6w-4rrg

Source code

Credits

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