GHSA-c6c4-7x48-4cqp Timing side channel vulnerability in UIDL request handler in Vaadin 10, 11-14, and 15-18
Attackers can bypass CSRF protection by guessing security tokens via timing side-channel attacks in the UIDL request handler.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is GHSA-c6c4-7x48-4cqp?
GHSA-c6c4-7x48-4cqp is a vulnerability in com.vaadin:vaadin-bom, published on 19 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by GHSA-c6c4-7x48-4cqp?
6 open source packages ship an affected version, including com.vaadin:vaadin-bom.
| Package | Affected | Fixed in |
|---|---|---|
com.vaadin:vaadin-bom Maven | From 10.0.0 | 10.0.17 |
com.vaadin:vaadin-bom Maven | From 10.0.0 | 10.0.17 |
com.vaadin:vaadin-bom Maven | From 11.0.0 | 14.4.7 |
com.vaadin:vaadin-bom Maven | From 11.0.0 | 14.4.7 |
com.vaadin:vaadin-bom Maven | From 15.0.0 | 18.0.6 |
com.vaadin:vaadin-bom Maven | From 15.0.0 | 18.0.6 |
How do I fix GHSA-c6c4-7x48-4cqp?
Upgrade com.vaadin:vaadin-bom to a fixed version for your release line: 10.0.17, 14.4.7 or 18.0.6.
Is GHSA-c6c4-7x48-4cqp being exploited?
There is no known exploitation of GHSA-c6c4-7x48-4cqp in the wild and no public exploit code.