Saia Burgess Controls (SBC) PCD through 2022-05-06 allows Authentication bypass. According to FSCT-2022-0062, there is a Saia Burgess Controls (SBC) PCD S-Bus authentication bypass issue. The affected components are characterized as: S-Bus (5050/UDP) authentication. The potential impact is: Authentication bypass. The Saia Burgess Controls (SBC) PCD controllers utilize the S-Bus protocol (5050/UDP) for a variety of engineering purposes. It is possible to configure a password in order to restrict access to sensitive engineering functionality. Authentication functions on the basis of a MAC/IP whitelist with inactivity timeout to which an authenticated client's MAC/IP is stored. UDP traffic can be spoofed to bypass the whitelist-based access control. Since UDP is stateless, an attacker capable of passively observing traffic can spoof arbitrary messages using the MAC/IP of an authenticated client. This allows the attacker access to sensitive engineering functionality such as uploading/downloading control logic and manipulating controller configuration.

Threat-Mapped Scoring

Score: 3.0

Priority: P2 - Serious (High)

• S1 – Steal Customer Account Information

EPSS

Score: 8e-05
Percentile: 0.0044

CVSS Scoring

Mapped CWE(s)

• CWE-290 : Authentication Bypass by Spoofing

All CAPEC(s)

CAPEC(s) with Mapped TTPs

Mapped ATT&CK TTPs

• T1134 : Access Token Manipulation
  Kill Chain: defense-evasion
• T1528 : Steal Application Access Token
  Kill Chain: credential-access
• 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
• T1134.001 : Token Impersonation/Theft
  Kill Chain: defense-evasion
• T1550.004 : Web Session Cookie
  Kill Chain: defense-evasion
• T1557 : Adversary-in-the-Middle
  Kill Chain: credential-access

Malware

APTs Threat Group Associations

Campaigns

Affected Products

• cpe:2.3:a:honeywell:saia_pg5_controls_suite:-:*:*:*:*:*:*:*

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