PT-2021-12004 · Vaadin · Vaadin-Server

Published 2021-04-19 · Updated 2021-05-05 · CVE-2020-36320

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: com.vaadin:vaadin-server versions 7.0.0 through 7.7.21

Description: The issue is related to an unsafe validation RegEx in the EmailValidator class, which allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.

Recommendations: For versions 7.0.0 through 7.7.21, consider disabling the EmailValidator class until a patch is available to prevent uncontrolled resource consumption. Restrict access to the EmailValidator functionality to minimize the risk of exploitation.

Exploit

Fix

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

CVE-2020-36320

GHSA-42J4-733X-5VCF

Affected Products

Vaadin-Server

References · 7

• 🔥 https://github.com/vaadin/framework/issues/7757 · Exploit
• https://github.com/vaadin/framework/pull/12104 · Patch
• https://osv.dev/vulnerability/GHSA-42j4-733x-5vcf · Vendor Advisory
• https://vaadin.com/security/cve-2020-36320 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-36320 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-36320 · Security Note
• https://github.com/vaadin/framework/security/advisories/GHSA-42j4-733x-5vcf · Note