CVE-2023-1973 Undertow: unrestricted request storage leads to memory exhaustion
Attackers can cause server memory exhaustion and denial of service by sending crafted requests to the Undertow web server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-1973?
CVE-2023-1973 is a high-severity denial of service vulnerability in Red Hat JBoss Enterprise Application Platform 7, published on 7 Nov 2024. 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 package. Using the FormAuthenticationMechanism, a malicious user could trigger a Denial of Service by sending crafted requests, leading the server to an OutofMemory error, exhausting the server's memory.
Weakness: CWE-20
Which versions are affected by CVE-2023-1973?
4 open source packages ship an affected version, including io.undertow:undertow-core.
| Package | Affected | Fixed in |
|---|---|---|
io.undertow:undertow-core Maven | All versions | 2.2.32.Final |
io.undertow:undertow-core Maven | All versions | 2.2.32.Final |
io.undertow:undertow-core Maven | From 2.3.0.Alpha1 | 2.3.13.Final |
io.undertow:undertow-core Maven | From 2.3.0.Alpha1 | 2.3.13.Final |
How do I fix CVE-2023-1973?
Upgrade io.undertow:undertow-core to a fixed version for your release line: 2.2.32.Final or 2.3.13.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-2023-1973 being exploited?
There is no known exploitation of CVE-2023-1973 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2023-1973, GHSA-97cq-f4jm-mv8h, OESA-2024-2419, UBUNTU-CVE-2023-1973.