Summary
Multiple vulnerabilities allow an attacker to read arbitrary files, inject commands and bypass authentication or access control. Furthermore, hardcoded session and encryption keys as well as a missing firmware update signature and a service running with unnecessary privileges were discovered.
Details
Impact
These vulnerabilities allow an attacker to compromise the confidentiality, integrity and availability of the device. An authenticated attacker can gain an administrative shell, execute arbitrary OS commands with administrative privileges, read any files accessible for the 'browser' user, craft valid session cookies, decrypt the password for web service, retrieve SNMP communities or craft a malicious firmware update packet.
Mitigation
Phoenix Contact recommends operating network-capable devices in closed networks or protected with a suitable firewall. For detailed information on our recommendations for measures to protect network-capable devices, please refer to our application note:
Measures to protect network-capable devices with Ethernet connection
Remediation
Phoenix Contact strongly recommends updating to the latest Firmware Release 4.0.10 which fixes the above-mentioned vulnerabilities.
Vulnerabilities 14
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Critical 10.0
PHOENIX CONTACT: OS Command Injection in WP 6xxx Web panels
In PHOENIX CONTACTs WP 6xxx series web panels in versions prior to 4.0.10 a remote, unauthenticated attacker may use an attribute of a specific HTTP POST request releated to date/time operations to gain full access to the device.
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High 8.8
PHOENIX CONTACT: OS Command Injection in WP 6xxx Web panels
In PHOENIX CONTACTs WP 6xxx series web panels in versions prior to 4.0.10 a remote attacker with low privileges may use a specific HTTP DELETE request to gain full access to the device.
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High 8.8
PHOENIX CONTACT: OS Command Injection in WP 6xxx Web panels
In PHOENIX CONTACTs WP 6xxx series web panels in versions prior to 4.0.10 a remote attacker with low privileges may use a specific HTTP POST releated to certificate operations to gain full access to the device.
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High 8.8
PHOENIX CONTACT: Command Injection in WP 6xxx Web panels
In PHOENIX CONTACTs WP 6xxx series web panels in versions prior to 4.0.10 a remote attacker with low privileges may use a command injection in a HTTP POST request releated to font configuration operations to gain full access to the device.
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High 8.8
PHOENIX CONTACT: OS Command Injection in WP 6xxx Web panels
In PHOENIX CONTACTs WP 6xxx series web panels in versions prior to 4.0.10 an authenticated remote attacker can execute code with root permissions with a specially crafted HTTP POST when uploading a certificate to the device.
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High 8.2
PHOENIX CONTACT: Missing Authorization in WP 6xxx Web panels
In PHOENIX CONTACTs WP 6xxx series web panels in versions prior to 4.0.10 an unauthenticated remote attacker can access upload-functions of the HTTP API. This might cause certificate errors for SSL-connections and might result in a partial denial-of-service.
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High 7.5
PHOENIX CONTACT: Missing Authorization in WP 6xxx Web panels
In PHOENIX CONTACTs WP 6xxx series web panels in versions prior to 4.0.10 a remote unauthenticated attacker can obtain the r/w community string of the SNMPv2 daemon.
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High 7.2
PHOENIX CONTACT: Improper Privilege Management in WP 6xxx Web panels
In PHOENIX CONTACTs WP 6xxx series web panels in versions prior to 4.0.10 the SNMP daemon is running with root privileges allowing a remote attacker with knowledge of the SNMPv2 r/w community string to execute system commands as root.
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High 7.2
PHOENIX CONTACT: OS Command Injection in WP 6xxx Web panels
In PHOENIX CONTACTs WP 6xxx series web panels in versions prior to 4.0.10 a remote attacker with SNMPv2 write privileges may use an a special SNMP request to gain full access to the device.
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High 7.2
PHOENIX CONTACT: WP 6xxx Web panels prone to download code without integrity check
In PHOENIX CONTACTs WP 6xxx series web panels in versions prior to 4.0.10 a remote attacker with SNMPv2 write privileges may use an a special SNMP request to gain full access to the device.
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Medium 4.9
PHOENIX CONTACT: Use of Hard-coded Credentials in WP 6xxx Web panels
In PHOENIX CONTACTs WP 6xxx series web panels in versions prior to 4.0.10 an authenticated, remote attacker with admin privileges is able to read hardcoded cryptographic keys allowing to decrypt an encrypted web application login password.
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Medium 4.3
PHOENIX CONTACT: Unauthorized read-access of root filesystem in WP 6xxx Web panels
In PHOENIX CONTACTs WP 6xxx series web panels in versions prior to 4.0.10 a remote attacker with low privileges is able to gain limited read-access to the device-filesystem within the embedded Qt browser.
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Medium 4.3
PHOENIX CONTACT: Unauthorized read-access of root filesystem in WP 6xxx Web panels
In PHOENIX CONTACTs WP 6xxx series web panels in versions prior to 4.0.10 a remote attacker with low privileges is able to gain limited read-access to the device-filesystem through a configuration dialog within the embedded Qt browser .
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Low 3.8
PHOENIX CONTACT: Use of Hard-coded Credentials in WP 6xxx Web panels
In PHOENIX CONTACTs WP 6xxx series web panels in versions prior to 4.0.10 an authenticated, remote attacker with admin privileges is able to read hardcoded cryptographic keys allowing the attacker to create valid session cookies. These session-cookies created…
Revision history
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#2
Fix: quotation mark
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#1
Initial revision.
References
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VDE-2023-018: Phoenix Contact: Multiple vulnerabilities in WP 6xxx Web panels - HTML
https://certvde.com/en/advisories/VDE-2023-018/
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Vendor PSIRT
https://phoenixcontact.com/psirt
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CERT@VDE Security Advisories for Phoenix Contact GmbH & Co. KG
https://certvde.com/en/advisories/vendor/phoenixcontact/