The ocsp_check function in rlm_eap_tls.c in FreeRADIUS 2.1.11, when OCSP is enabled, does not properly parse replies from OCSP responders, which allows remote attackers to bypass authentication by using the EAP-TLS protocol with a revoked X.509 client certificate.

Threat-Mapped Scoring

Score: 0.0

Priority: Unclassified

EPSS

Score: 0.00882
Percentile: 0.74415

CVSS Scoring

Mapped CWE(s)

• CWE-287 : Improper Authentication

All CAPEC(s)

CAPEC(s) with Mapped TTPs

Mapped ATT&CK TTPs

• T1548 : Abuse Elevation Control Mechanism
  Kill Chain: privilege-escalation
• T1548 : Abuse Elevation Control Mechanism
  Kill Chain: privilege-escalation
• T1040 : Network Sniffing
  Kill Chain: credential-access
• T1185 : Browser Session Hijacking
  Kill Chain: collection
• T1550.001 : Application Access Token
  Kill Chain: defense-evasion
• T1563 : Remote Service Session Hijacking
  Kill Chain: lateral-movement
• T1134 : Access Token Manipulation
  Kill Chain: defense-evasion
• T1505.003 : Web Shell
  Kill Chain: persistence
• T1557 : Adversary-in-the-Middle
  Kill Chain: credential-access

Malware

APTs Threat Group Associations

Campaigns

Affected Products

• cpe:2.3:a:freeradius:freeradius:2.1.11:*:*:*:*:*:*:*

← Back to Home