#VU81287 Observable discrepancy in framework - CVE-2021-31403
Published: September 29, 2023
Vulnerability identifier: #VU81287
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-31403
CWE-ID: CWE-203
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
framework
framework
Software vendor:
vaadin
vaadin
Description
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to non-constant-time comparison of CSRF tokens in UIDL request handler. A local user can guess a security token for Fusion endpoints and then use this information to launch further attacks against the affected system.
Remediation
Install update from vendor's website.