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TI-2021-19303 Aliases CVE-2021-43310

Authentication bypass by spoofing in keylime

Priority HIGH 82CWE-290Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-290.

Summary

A vulnerability in Keylime before 6.3.0 allows an attacker to craft a request to the agent that resets the U and V keys as if the agent were being re-added to a verifier. This could lead to a remote code execution.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.02209 82nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—keylimekeylime 6.3.0—No fix listedCNA
  • keylime Vendor— Affected keylime 6.3.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:keylime:keylime:*:*:*:*:*:*:*:*before 6.3.0VulnerableKeylime
  • cpe:2.3:a:keylime:keylime:*:*:*:*:*:*:*:* Versions before 6.3.0 Vulnerable ·Keylime

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-43310

References

Exploit 1

Advisory 1

  • TI-2022-07922 Exposure of resource to wrong sphere in keylime CVSS 3.1HIGH 7.5
  • TI-2022-07921 Authentication bypass by spoofing in keylime CVSS 3.1HIGH 7.5
  • TI-2022-07923 Uncontrolled resource consumption in keylime CVSS 3.1MEDIUM 5.5
  • TI-2026-01392 Improper certificate validation in Red Hat Enterprise Linux 10 CVSS 3.1CRITICAL 9.8
  • TI-2021-02373 Improper signature verification in keylime CVSS 3.1CRITICAL 9.8
  • TI-2023-19613 Keylime: registrar is subject to a dos against ssl connections CVSS 3.1HIGH 7.5
See all 12 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences