CVE-2023-43669 Tungstenite allows remote attackers to cause a denial of service

What is CVE-2023-43669?

CVE-2023-43669 is a high-severity denial of service vulnerability in Fedoraproject Fedora, published on 21 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The Tungstenite crate before 0.20.1 for Rust allows remote attackers to cause a denial of service (minutes of CPU consumption) via an excessive length of an HTTP header in a client handshake. The length affects both how many times a parse is attempted (e.g., thousands of times) and the average amount of data for each parse attempt (e.g., millions of bytes).

Which versions are affected by CVE-2023-43669?

3 open source packages ship an affected version, including tungstenite. It affects 2 products.

Products include Fedoraproject Fedora, Snapview Tungstenite.

How do I fix CVE-2023-43669?

Upgrade tungstenite to 0.20.1 or later.

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-2023-43669 being exploited?

There is no known exploitation of CVE-2023-43669 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2023-43669, GHSA-9mcr-873m-xcxp, RUSTSEC-2023-0065, UBUNTU-CVE-2023-43669.