Keylime: challenge-response protocol bypass during agent registration
Priority LOW 29CWE-639Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-639.
Summary
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.
Why it matters now
EPSS 0.0049 42nd percentileScored 2026-11-07
Fix Fixed keylime (PyPI): 7.5.0Red Hat: 1 advisory
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 9 | — | 6.5.2-6.el9_2 | Patch available | CNA |
| — | keylime (PyPI) | before 7.5.0 | 7.5.0 | Patch available | GHSA-f4r5-q63f-gcww |
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 6.5.2-6.el9_2 Patch available CNA
- keylime (PyPI) Vendor— Affected before 7.5.0 Fixed in 7.5.0 Patch available GHSA-f4r5-q63f-gcww
CPE configurations NVD · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:keylime:keylime:*:*:*:*:*:*:*:* | before 7.5.0 | Vulnerable | Keylime |
| cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_eus:9.2:*:*:*:*:*:*:* | 9.2 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:9.0_s390x:*:*:*:*:*:*:* | 9.0_s390x | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:9.2_s390x:*:*:*:*:*:*:* | 9.2_s390x | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:9.0_ppc64le:*:*:*:*:*:*:* | 9.0_ppc64le | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:9.2_ppc64le:*:*:*:*:*:*:* | 9.2_ppc64le | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_aus:9.2:*:*:*:*:*:*:* | 9.2 | Vulnerable | Red Hat |
| cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* | 38 | Vulnerable | Fedoraproject |
- cpe:2.3:a:keylime:keylime:*:*:*:*:*:*:*:* Versions before 7.5.0 Vulnerable ·Keylime
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_eus:9.2:*:*:*:*:*:*:* Versions 9.2 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:9.0_s390x:*:*:*:*:*:*:* Versions 9.0_s390x Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:9.2_s390x:*:*:*:*:*:*:* Versions 9.2_s390x Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:9.0_ppc64le:*:*:*:*:*:*:* Versions 9.0_ppc64le Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:9.2_ppc64le:*:*:*:*:*:*:* Versions 9.2_ppc64le Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_aus:9.2:*:*:*:*:*:*:* Versions 9.2 Vulnerable ·Red Hat
- cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* Versions 38 Vulnerable ·Fedoraproject
Remediation
- Fix · GHSA-f4r5-q63f-gcww keylime (PyPI) Fixed in 7.5.0 Advisory →
Red Hat 1 advisory
- RHSA-2023:5080 Released 2023-09-12 · Red Hat rating Moderatekeylime security update
- Red Hat Enterprise Linux AppStream (v. 9) keylime-6.5.2-6.el9_2, keylime-base-6.5.2-6.el9_2, keylime-registrar-6.5.2-6.el9_2 +4
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2023:5080 |
Timeline
- 2026-10-02 Threatist record created from CVE-2023-38201
- 2026-10-03 Alias added: GHSA-f4r5-q63f-gcww
References
Patch 2
Advisory 4
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Sources
- CVE-2023-38201 · CVE Program
- CVE-2023-38201 · NVD
- FIRST EPSS
- GHSA-f4r5-q63f-gcww · GitHub Advisory Database · CC BY 4.0
- CVE-2023-38201 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences