Honeywell IQ4x BMS Controller Missing authentication for critical function
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- 1 proof of concept on GitHub
- Exploitation: none
- Automatable: yes
- Technical impact: total
Summary
The Honeywell IQ4x building management controller, exposes its full web-based HMI without authentication in its factory-default configuration. With no user module configured, security is disabled by design and the system operates under a System Guest (level 100) context, granting read/write privileges to any party able to reach the HTTP interface. Authentication controls are only enforced after a web user is created via U.htm, which dynamically enables the user module. Because this function is accessible prior to authentication, a remote user can create a new account with administrative read/write permissions enabling the user module and imposing authentication under attacker-controlled credentials. This action can effectively lock legitimate operators out of local and web-based configuration and administration.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: total
- Record last updated
Affected versions
- Honeywell IQ4E
From v3.50_3.44 · through 4.36 (build 4.3.7.9)
- Honeywell IQ412
From v3.50_3.44 · through 4.36 (build 4.3.7.9)
- Honeywell IQ422
From v3.50_3.44 · through 4.36 (build 4.3.7.9)
- Honeywell IQ4NC
From v3.50_3.44 · through 4.36 (build 4.3.7.9)
- Honeywell IQ41x
From v3.50_3.44 · through 4.36 (build 4.3.7.9)
- Honeywell IQ3
From v3.50_3.44 · through 4.36 (build 4.3.7.9)
- Honeywell IQECO
From v3.50_3.44 · through 4.36 (build 4.3.7.9)