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MEDIUM severity

Timing side channel vulnerability in UIDL request handler in Vaadin 10, 11-14, and 15-18GHSA-c6c4-7x48-4cqp

MEDIUM

GHSA-c6c4-7x48-4cqp is a medium-severity (CVSS 4) vulnerability in com.vaadin:vaadin-bom. A fix is available for com.vaadin:vaadin-bom — see the affected versions and patch details below.

Published
Updated
Affected
3 pkgs
Patched
3 / 3
Exploits
None indexed
Exploitation data as of Dec 2, 2024 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

3 pkgs affected
☕com.vaadin:vaadin-bom☕com.vaadin:vaadin-bom☕com.vaadin:vaadin-bom

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Non-constant-time comparison of CSRF tokens in UIDL request handler in com.vaadin:flow-server versions 1.0.0 through 1.0.13 (Vaadin 10.0.0 through 10.0.16), 1.1.0 prior to 2.0.0 (Vaadin 11 prior to 14), 2.0.0 through 2.4.6 (Vaadin 14.0.0 through 14.4.6), 3.0.0 prior to 5.0.0 (Vaadin 15 prior to 18), and 5.0.0 through 5.0.2 (Vaadin 18.0.0 through 18.0.5) allows attacker to guess a security token via timing attack.

Affected Packages

3 total 3 fixed
EcosystemPackageVulnerable rangeFix
☕Mavencom.vaadin:vaadin-bom≥ 10.0.0&&< 10.0.1710.0.17com.vaadin:vaadin-bom:10.0.17
☕Mavencom.vaadin:vaadin-bom≥ 11.0.0&&< 14.4.714.4.7com.vaadin:vaadin-bom:14.4.7
☕Mavencom.vaadin:vaadin-bom≥ 15.0.0&&< 18.0.618.0.6com.vaadin:vaadin-bom:18.0.6

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.vaadin:vaadin-bom, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update com.vaadin:vaadin-bom to 10.0.17 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-c6c4-7x48-4cqp is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

Non-constant-time comparison of CSRF tokens in UIDL request handler in `com.vaadin:flow-server` versions 1.0.0 through 1.0.13 (Vaadin 10.0.0 through 10.0.16), 1.1.0 prior to 2.0.0 (Vaadin 11 prior to 14), 2.0.0 through 2.4.6 (Vaadin 14.0.0 through 14.4.6), 3.0.0 prior to 5.0.0 (Vaadin 15 prior to 18), and 5.0.0 through 5.0.2 (Vaadin 18.0.0 through 18.0.5) allows attacker to guess a security token via timing attack. - https://vaadin.com/security/cve-2021-31404
O3 Security · Impact-Aware SCA

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Timing side channel vulnerability in UIDL request handler…