CVE-2021-31403

Timing side channel vulnerability in UIDL request handler in Vaadin 7 and 8

Description

Non-constant-time comparison of CSRF tokens in UIDL request handler in com.vaadin:vaadin-server versions 7.0.0 through 7.7.23 (Vaadin 7.0.0 through 7.7.23), and 8.0.0 through 8.12.2 (Vaadin 8.0.0 through 8.12.2) allows attacker to guess a security token via timing attack

Categories

4.0
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.12%
Vendor Advisory vaadin.com
Affected: Vaadin Vaadin
Affected: Vaadin vaadin-server
Published at:
Updated at:

References

Link Tags
https://vaadin.com/security/cve-2021-31403 vendor advisory
https://github.com/vaadin/framework/pull/12190 third party advisory patch
https://github.com/vaadin/framework/pull/12188 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-31403?
CVE-2021-31403 has been scored as a medium severity vulnerability.
How to fix CVE-2021-31403?
To fix CVE-2021-31403, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-31403 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-31403 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-31403?
CVE-2021-31403 affects Vaadin Vaadin, Vaadin vaadin-server.
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