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Regular expression Denial of Service (ReDoS) in EmailValidator class in V7 compatibility module in Vaadin 8

High severity GitHub Reviewed Published Apr 30, 2021 in vaadin/framework • Updated Feb 1, 2023

Package

maven com.vaadin:vaadin-compatibility-server (Maven)

Affected versions

>= 8.0.0, < 8.13.0

Patched versions

8.13.0

Description

Unsafe validation RegEx in EmailValidator component in com.vaadin:vaadin-compatibility-server versions 8.0.0 through 8.12.4 (Vaadin versions 8.0.0 through 8.12.4) allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.

References

@fluorumlabs fluorumlabs published to vaadin/framework Apr 30, 2021
Reviewed Apr 30, 2021
Published to the GitHub Advisory Database May 4, 2021
Published by the National Vulnerability Database May 6, 2021
Last updated Feb 1, 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

0.176%
(56th percentile)

Weaknesses

CVE ID

CVE-2021-31409

GHSA ID

GHSA-c332-w4jm-55wv

Source code

No known source code

Credits

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