CVE-2021-3629 Undertow Uncontrolled Resource Consumption
Attackers can cause server overhead or denial of service via HTTP/2 flow control handling in Undertow.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-3629?
CVE-2021-3629 is a medium-severity denial of service vulnerability in Netapp Active Iq Unified Manager, published on 24 May 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw was found in Undertow. A potential security issue in flow control handling by the browser over http/2 may potentially cause overhead or a denial of service in the server. The highest threat from this vulnerability is availability. This flaw affects Undertow versions prior to 2.0.40.Final and prior to 2.2.11.Final.
Weakness: CWE-400
Which versions are affected by CVE-2021-3629?
4 open source packages ship an affected version, including io.undertow:undertow-core. It affects 8 products.
| Package | Affected | Fixed in |
|---|---|---|
io.undertow:undertow-core Maven | All versions | 2.0.40.Final |
io.undertow:undertow-core Maven | All versions | 2.0.40.Final |
io.undertow:undertow-core Maven | From 2.1.0 | 2.2.11.Final |
io.undertow:undertow-core Maven | From 2.1.0 | 2.2.11.Final |
Products include Netapp Active Iq Unified Manager, Netapp Oncommand Insight, Netapp Oncommand Workflow Automation, Redhat Integration, Redhat Jboss Enterprise Application Platform, Redhat Single Sign-On and 2 more.
How do I fix CVE-2021-3629?
Upgrade io.undertow:undertow-core to a fixed version for your release line: 2.0.40.Final or 2.2.11.Final.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-3629 being exploited?
There is no known exploitation of CVE-2021-3629 in the wild and no public exploit code.
Other vulnerabilities in Netapp Active Iq Unified Manager
Sources
Also known as DEBIAN-CVE-2021-3629, GHSA-rf6q-vx79-mjxr, UBUNTU-CVE-2021-3629.