CVE-2024-11738 Rustls: rustls network-reachable panic in `acceptor::accept`
A remote attacker can cause a denial of service by sending a fragmented TLS ClientHello message to applications using the Rustls library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-11738?
CVE-2024-11738 is a medium-severity denial of service vulnerability in Red Hat Trusted Artifact Signer, published on 6 Dec 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 Rustls 0.23.13 and related APIs. This vulnerability allows denial of service (panic) via a fragmented TLS ClientHello message.
Weakness: CWE-248
Which versions are affected by CVE-2024-11738?
3 open source packages ship an affected version, including rustls. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
rustls crates.io | From 0.23.0 | 0.23.0, 0.23.18 |
rustls crates.io | From 0.23.13 | 0.23.18 |
rustls crates.io | From 0.23.13 | 0.23.18 |
Linux distribution packages (1)
himmelblau openSUSE:Tumbleweed | All versions | 0.7.7+git.0.b48d0bb-1.1 |
Products include Rustls Project Rustls.
How do I fix CVE-2024-11738?
Upgrade rustls to a fixed version for your release line: 0.23.0 or 0.23.18.
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-2024-11738 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-11738 exists.
Other vulnerabilities in Red Hat Trusted Artifact Signer
Sources
Also known as AZL-61546, CVE-2024-58254, GHSA-qg5g-gv98-5ffh, RUSTSEC-2024-0399, UBUNTU-CVE-2024-11738, openSUSE-SU-2024:14539-1.