high
7.5
CWE
834 400
Advisory Published
CVE Published
Advisory Published
Updated

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 SoftwareAffected VersionHow to fix
pip/keylime<7.4.0
7.4.0
redhat/keylime<7.5.0
7.5.0
Keylime (Keylime)
Red Hat Enterprise Linux=9.0
Red Hat Enterprise Linux Server EUS=9.2
Red Hat Enterprise Linux for IBM Z Systems=9.0_s390x
Red Hat Enterprise Linux for IBM Z Systems (s390x)=9.2_s390x
Red Hat Enterprise Linux for Power, little endian=9.0_ppc64le
Red Hat Enterprise Linux for Power, little endian - Extended Update Support=9.0_ppc64le
Red Hat Enterprise Linux Server=9.2
Red Hat Fedora=38
Red Hat Fedora

Remedy

https://github.com/keylime/keylime/pull/1421

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Reference Links

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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