WatchGuard SOHO products running firmware 5.1.6 and earlier, and Vclass/RSSA using 3.2 SP1 and earlier, allows remote attackers to bypass firewall rules by sending a PASV command string as the argument of another command to an FTP server, which generates a response that contains the string, causing IPFilter to treat the response as if it were a legitimate PASV command from the server.

Threat-Mapped Scoring

Score: 0.0

Priority: Unclassified

EPSS

Score: 0.00498
Percentile: 0.6485

CVSS Scoring

Mapped CWE(s)

• CWE-20 : Improper Input Validation

All CAPEC(s)

CAPEC(s) with Mapped TTPs

Mapped ATT&CK TTPs

• T1562.003 : Impair Command History Logging
  Kill Chain: defense-evasion
• T1574.006 : Dynamic Linker Hijacking
  Kill Chain: persistence
• T1574.007 : Path Interception by PATH Environment Variable
  Kill Chain: persistence
• T1027 : Obfuscated Files or Information
  Kill Chain: defense-evasion
• T1539 : Steal Web Session Cookie
  Kill Chain: credential-access
• T1036.001 : Invalid Code Signature
  Kill Chain: defense-evasion
• T1553.002 : Code Signing
  Kill Chain: defense-evasion

Malware

APTs Threat Group Associations

Campaigns

Affected Products

• cpe:2.3:h:watchguard:legacy_rssa:*:*:*:*:*:*:*:*
• cpe:2.3:h:watchguard:soho:*:*:*:*:*:*:*:*
• cpe:2.3:h:watchguard:vclass:*:*:*:*:*:*:*:*

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