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CVE-2023-38201

20
FAUCET Score

CVE-2023-38201 is a medium-severity flaw in the Keylime registrar, affecting fedoraproject, keylime, and redhat products. This vulnerability allows an attacker to bypass the challenge-response protocol during agent registration, potentially enabling them to impersonate an agent and obscure the true status of a monitored machine. With a CVSS score of 6.5, the attack requires adjacent network access and has high integrity impact, but no user interaction or confidentiality impact. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 7.5.0CPE matchmatch criteria
cpe:2.3:a:keylime:keylime:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
9.2CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_eus:9.2:*:*:*:*:*:*:*
9.0_s390xCPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:9.0_s390x:*:*:*:*:*:*:*
9.2_s390xCPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:9.2_s390x:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.50%
Probability of exploitation in next 30 days
EPSS Percentile
39.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0050 is in the 61st percentile among its peer group of 1,802 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

github_advisorypatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: keylimeFixed in: 7.5.0
redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: keylime-0:6.5.2-6.el9_2
View patch

Vendor Advisories (2)

pipGHSA-f4r5-q63f-gcwwhigh

Keylime registrar and (untrusted) Agent can be bypassed by an attacker

Sep 6, 2023
redhatCVE-2023-38201Moderate

Keylime: challenge-response protocol bypass during agent registration

Aug 23, 2023

References

lists.fedoraproject.org / archives/list/[email protected]/message/ZIZZB5NHNCS5D2AEH3ZAO6OQC72IK7WS
access.redhat.com / errata/RHSA-2023:5080
Third Party Advisory
access.redhat.com / security/cve/CVE-2023-38201
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
github.com / keylime/keylime/commit/9e5ac9f25cd400b16d5969f531cee28290543f2a
Patch
github.com / keylime/keylime/security/advisories/GHSA-f4r5-q63f-gcww
Vendor Advisory