Keylime
CVE-2021-3406
CRITICAL
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A04:2025 - Cryptographic Failures
ASVS 5.0
V11 - Cryptography Signature verification
|
| Impact | CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. |
| Exploit ScenarioDerived | This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the critical-severity affected system. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAI
A flaw was found in keylime 5.8.1 and older. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified under CWE-347. A flaw was found in keylime 5.8.1 and older. The issue in the Keylime agent and registrar code invalidates the cryptographic chain of trust from the Endorsement Key certificate to agent attestations. Affected products include: Keylime, Fedoraproject Fedora.
Know when Keylime gets its next vulnerability
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
A flaw was found in keylime 5.8.1 and older. The issue in the Keylime agent and registrar code invalidates the cryptographic chain of trust from the Endorsement Key certificate to agent attestations.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.
Affected Products (CPE)NVD
In Keylime before 6.3.0, current keylime installer installs the keylime.conf file, which can contain sensitive data, as
In Keylime before 6.3.0, Revocation Notifier uses a fixed /tmp path for UNIX domain socket which can allow unprivileged
In Keylime before 6.3.0, unsanitized UUIDs can be passed by a rogue agent and can lead to log spoofing on the verifier a
A flaw was found in Keylime before 6.3.0. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no
Authentication bypass in the Keylime registrar (versions 7.12.0 and later) lets unauthenticated network attackers perfor
In Keylime before 6.3.0, quote responses from the agent can contain possibly untrusted ZIP data which can lead to zip bo
Keylime does not enforce that the agent registrar data is the same when the tenant uses it for validation of the EK and
A flaw was found in Keylime. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authenticati
A flaw was found in the Keylime registrar that could allow a bypass of the challenge-response protocol during agent regi
A vulnerability was found in keylime. Rated medium severity (CVSS 5.1), this vulnerability is no authentication required
A flaw was found in the keylime attestation verifier, which fails to flag a device's submitted TPM quote as faulty when
Exploit-DB