Epic Games Unreal Engine 226f through 436 does not validate the challenge key, which allows remote attackers to exhaust the player limit by joining the game multiple times.

Threat-Mapped Scoring

Score: 0.0

Priority: Unclassified

EPSS

Score: 0.00581
Percentile: 0.67915

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:epic_games:unreal_engine:226f:*:*:*:*:*:*:*
• cpe:2.3:a:epic_games:unreal_engine:433:*:*:*:*:*:*:*
• cpe:2.3:a:epic_games:unreal_engine:436:*:*:*:*:*:*:*

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