{"id":"CVE-2023-38200","aliases":["PYSEC-2026-1489"],"url":"https://o3.security/vulnerability/CVE-2023-38200","summary":"Keylime's registrar vulnerable to Denial-of-service attack via a single open connection","details":"### Impact\nKeylime `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`.\n\n### Patches\nUsers should upgrade to release 7.4.0","published":"2023-08-01T20:16:29Z","modified":"2026-07-07T17:56:38.781897589Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"keylime","fixedVersion":"7.4.0"}],"fix":{"url":"https://github.com/keylime/keylime/pull/1421","label":"keylime/keylime#1421"},"references":[{"type":"WEB","url":"https://github.com/keylime/keylime/security/advisories/GHSA-pg75-v6fp-8q59"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-38200"},{"type":"WEB","url":"https://github.com/keylime/keylime/pull/1421"},{"type":"WEB","url":"https://github.com/keylime/keylime/commit/c68d8f0b7ea549c12b6956ab0f3c28ae0360ae17"},{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2023-38200"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2222692"},{"type":"PACKAGE","url":"https://github.com/keylime/keylime"},{"type":"WEB","url":"https://github.com/keylime/keylime/releases/tag/v7.4.0"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-07T17:56:38.781897589Z"}}