CVE-2023-38200 Keylime: registrar is subject to a dos against ssl connections

What is CVE-2023-38200?

CVE-2023-38200 is a high-severity denial of service vulnerability in Fedoraproject Fedora, published on 24 Jul 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A flaw was found in Keylime. Due to their blocking nature, the Keylime registrar is subject to a remote denial of service against its SSL connections. This flaw allows an attacker to exhaust all available connections.

Weakness: CWE-834, CWE-400

Which versions are affected by CVE-2023-38200?

3 open source packages ship an affected version, including keylime. It affects 9 products.

Products include Fedoraproject Fedora, Keylime Keylime, Redhat Enterprise Linux, Redhat Enterprise Linux Eus, Redhat Enterprise Linux for Ibm Z Systems, Redhat Enterprise Linux for Ibm Z Systems Eus and 3 more.

How do I fix CVE-2023-38200?

Upgrade keylime to 7.4.0 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-2023-38200 being exploited?

There is no known exploitation of CVE-2023-38200 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 GHSA-pg75-v6fp-8q59, PYSEC-2026-1489, SUSE-SU-2023:3245-1, openSUSE-SU-2024:13096-1.