Keylime's registrar vulnerable to Denial-of-service attack via a single open connection
### 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
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2023-38200US | high7.5 | — | ||
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… | ||||
references
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/CVE-2023-38200WEB
- https://bugzilla.redhat.com/show_bug.cgi?id=2222692WEB
- https://github.com/keylime/keylimePACKAGE
- https://github.com/keylime/keylime/commit/c68d8f0b7ea549c12b6956ab0f3c28ae0360ae17WEB
- https://github.com/keylime/keylime/pull/1421WEB
- https://github.com/keylime/keylime/releases/tag/v7.4.0WEB
- https://github.com/keylime/keylime/security/advisories/GHSA-pg75-v6fp-8q59WEB
- https://nvd.nist.gov/vuln/detail/CVE-2023-38200ADVISORY
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