CVE-2023-38200: Keylime: registrar is subject to a dos against ssl connections
First published: Thu Jul 13 2023(Updated: )
### Impact Keylime `registrar` is prone to a simple denial of service attack in which an adversary opens a connection to the TLS port (by default, port `8891`) blocking further, legitimate connections. As long as the connection is open, the `registrar` is blocked and cannot serve any further clients (`agents` and `tenants`), which prevents normal operation. The problem does not affect the `verifier`. ### Patches Users should upgrade to release 7.4.0
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/keylime | <7.5.0 | 7.5.0 |
| Keylime Keylime | ||
| Redhat Enterprise Linux | =9.0 | |
| Fedoraproject Fedora | ||
| =9.0 | ||
| =9.2 | ||
| =9.0_s390x | ||
| =9.2_s390x | ||
| =9.0_ppc64le | ||
| =9.0_ppc64le | ||
| =9.2 | ||
| =38 | ||
| pip/keylime | <7.4.0 | 7.4.0 |
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Reference Links
- https://github.com/keylime/keylime/security/advisories/GHSA-pg75-v6fp-8q59
- https://nvd.nist.gov/vuln/detail/CVE-2023-38200
- https://github.com/keylime/keylime/pull/1421
- https://github.com/keylime/keylime/commit/c68d8f0b7ea549c12b6956ab0f3c28ae0360ae17
- https://access.redhat.com/security/cve/CVE-2023-38200
- https://bugzilla.redhat.com/show_bug.cgi?id=2222692
- https://github.com/keylime/keylime/releases/tag/v7.4.0
- https://github.com/advisories/GHSA-pg75-v6fp-8q59 (Advisory)
- https://access.redhat.com/errata/RHSA-2023:5080
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZIZZB5NHNCS5D2AEH3ZAO6OQC72IK7WS/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2222841
Frequently Asked Questions
What is CVE-2023-38200?
CVE-2023-38200 is a vulnerability found in Keylime that allows for a denial of service attack.
What is the impact of CVE-2023-38200?
The impact of CVE-2023-38200 is that an adversary can open a connection to the TLS port, blocking legitimate connections and preventing the `registrar` from serving any further clients.
Which software versions are affected by CVE-2023-38200?
Keylime, Red Hat Enterprise Linux 9.0, Fedora, and keylime package versions up to and excluding 7.4.0 are affected by CVE-2023-38200.
What is the severity of CVE-2023-38200?
The severity of CVE-2023-38200 is high, with a severity value of 7.5.
How do I fix CVE-2023-38200?
To fix CVE-2023-38200, update to keylime version 7.5.0 or newer.
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