Auth bypass in Keylime
CVE-2023-38201
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.005 (39.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Keylime
- Fedoraproject Fedora — versions 38
- Red Hat Enterprise Linux 9 — versions 0:6.5.2-6.el9_2
- Red Hat Enterprise Linux — versions 9.0
- Red Hat Enterprise Linux Eus — versions 9.2
- Red Hat Enterprise Linux For IBM Z Systems — versions 9.0_s390x
- Red Hat Enterprise Linux For IBM Z Systems Eus — versions 9.2_s390x
- Red Hat Enterprise Linux For Power Little Endian — versions 9.0_ppc64le
- Red Hat Enterprise Linux For Power Little Endian Eus — versions 9.2_ppc64le
- Red Hat Enterprise Linux Server Aus — versions 9.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHSA-2023:5080 (vendor-advisory, Third Party Advisory)
- access.redhat.com/security/cve/CVE-2023-38201 (Third Party Advisory, vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Patch, Third Party Advisory, Issue Tracking)
- github.com/keylime/keylime/commit/9e5ac9f25cd400b16d5969f531cee28290543f2a (Patch)
- github.com/keylime/keylime/security/advisories/GHSA-f4r5-q63f-gcww (Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2023-38201?
- CVE-2023-38201 is a medium-severity vulnerability in Keylime, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2023-08-25.
- How severe is CVE-2023-38201?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2023-38201 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.