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Vulnerability · Published Aug 25, 2023 · Assigned by redhat

CVE-2023-38201Keylime: challenge-response protocol bypass during agent registration

Medium 6.5

In plain English

A medium-severity authorization bypass via user-controlled key in Red Hat Enterprise Linux 9 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.5%top 57.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

A flaw was found in the Keylime registrar that could allow a bypass of the challenge-response protocol during agent registration. This issue may allow an attacker to impersonate an agent and hide the true status of a monitored machine if the fake agent is added to the verifier list by a legitimate user, resulting in a breach of the integrity of the registrar database.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:9keylime6.5.2-6.el9_2.alma.1ALSA-2023:5080
AlmaLinux:9keylime-base6.5.2-6.el9_2.alma.1ALSA-2023:5080
AlmaLinux:9keylime-registrar6.5.2-6.el9_2.alma.1ALSA-2023:5080
AlmaLinux:9keylime-selinux6.5.2-6.el9_2.alma.1ALSA-2023:5080
AlmaLinux:9keylime-tenant6.5.2-6.el9_2.alma.1ALSA-2023:5080
AlmaLinux:9keylime-verifier6.5.2-6.el9_2.alma.1ALSA-2023:5080
AlmaLinux:9python3-keylime6.5.2-6.el9_2.alma.1ALSA-2023:5080
PyPIkeylime7.5.0GHSA-f4r5-q63f-gcww
PyPIkeylime7.5.0PYSEC-2023-160

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 9 see references

Weakness: CWE-639 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References