CVE-2024-23325 Envoy crashes when using an address type that isn’t supported by the OS
Attackers can crash Envoy proxy by sending IPv6 addresses when IPv6 is disabled on the host, requiring an upgrade to fix.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-23325?
CVE-2024-23325 is a high-severity denial of service vulnerability in Envoyproxy Envoy, published on 9 Feb 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Envoy is a high-performance edge/middle/service proxy. Envoy crashes in Proxy protocol when using an address type that isn’t supported by the OS. Envoy is susceptible to crashing on a host with IPv6 disabled and a listener config with proxy protocol enabled when it receives a request where the client presents its IPv6 address. It is valid for a client to present its IPv6 address to a target server even though the whole chain is connected via IPv4. This issue has been addressed in released 1.29.1, 1.28.1, 1.27.3, and 1.26.7. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Which versions are affected by CVE-2024-23325?
1 open source package ship an affected version, including envoy. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
envoy Bitnami | From 1.26.0 | 1.26.7, 1.27.3, 1.28.1, 1.29.1 |
Products include Envoyproxy Envoy.
How do I fix CVE-2024-23325?
Upgrade envoy to a fixed version for your release line: 1.26.7, 1.27.3, 1.28.1 or 1.29.1.
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-2024-23325 being exploited?
There is no known exploitation of CVE-2024-23325 in the wild and no public exploit code.
Other vulnerabilities in Envoyproxy Envoy
Sources
Also known as BIT-envoy-2024-23325, GHSA-5m7c-mrwr-pm26.