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Phoenix Contact: FL SWITCH 3xxx/4xxx/48xx series through 1.33 has a Stack-based Buffer Overflow

VDE-2018-006
Last update
05/14/2025 15:00
Published at
05/16/2018 12:00
Vendor(s)
Phoenix Contact GmbH & Co. KG
External ID
VDE-2018-006
CSAF Document
Download

Summary

An attacker may insert a carefully crafted cookie into a GET menu_pxc.cgi or GET index.cgi request to cause a buffer overflow that can initiate a Denial of Service attack and execute arbitrary code.

Impact

If vulnerability is exploited, the attacker may disable Web and Telnet services and execute arbitrary code.

Update 2018-05-28

Due to the way this vulnerability was discovered, the Attack Complexity has been changed from HIGH to LOW. This results in a new CVSS Vector with a severity of 9.8.

Affected Product(s)

Model no. Product name Affected versions
2891033 FL SWITCH 3004T-FX Firmware <=1.33
2891034 FL SWITCH 3004T-FX ST Firmware <=1.33
2891030 FL SWITCH 3005 Firmware <=1.33
2891032 FL SWITCH 3005T Firmware <=1.33
2891036 FL SWITCH 3006T-2FX Firmware <=1.33
2891060 FL SWITCH 3006T-2FX SM Firmware <=1.33
2891037 FL SWITCH 3006T-2FX ST Firmware <=1.33
2891031 FL SWITCH 3008 Firmware <=1.33
2891035 FL SWITCH 3008T Firmware <=1.33
2891120 FL SWITCH 3012E-2FX Firmware <=1.33
2891119 FL SWITCH 3012E-2FX SM Firmware <=1.33
2891067 FL SWITCH 3012E-2SFX Firmware <=1.33
2891058 FL SWITCH 3016 Firmware <=1.33
2891066 FL SWITCH 3016E Firmware <=1.33
2891059 FL SWITCH 3016T Firmware <=1.33
2891162 FL SWITCH 4000T-8POE-2SFP-R Firmware <=1.33
2891160 FL SWITCH 4008T-2GT-3FX SM Firmware <=1.33
2891061 FL SWITCH 4008T-2GT-4FX SM Firmware <=1.33
2891062 FL SWITCH 4008T-2SFP Firmware <=1.33
2891063 FL SWITCH 4012T 2GT 2FX Firmware <=1.33
2891161 FL SWITCH 4012T-2GT-2FX ST Firmware <=1.33
2891104 FL SWITCH 4800E-24FX SM-4GC Firmware <=1.33
2891102 FL SWITCH 4800E-24FX-4GC Firmware <=1.33
2891073 FL SWITCH 4808E-16FX LC-4GC Firmware <=1.33
2891074 FL SWITCH 4808E-16FX SM LC-4GC Firmware <=1.33
2891086 FL SWITCH 4808E-16FX SM ST-4GC Firmware <=1.33
2891080 FL SWITCH 4808E-16FX SM-4GC Firmware <=1.33
2891085 FL SWITCH 4808E-16FX ST-4GC Firmware <=1.33
2891079 FL SWITCH 4808E-16FX-4GC Firmware <=1.33
2891072 FL SWITCH 4824E-4GC Firmware <=1.33

Vulnerabilities

Expand / Collapse all

Published
09/22/2025 14:57
Severity
9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119)
Summary

All Phoenix Contact managed FL SWITCH 3xxx, 4xxx, 48xx products running firmware version 1.0 to 1.33 are prone to buffer overflows (a different vulnerability than CVE-2018-10731).

References
cve.org | nvd.nist.gov

Mitigation

Customers using Phoenix Contact managed FL SWITCH devices with affected firmware versions are recommended to disable the switch Web Agent.

Remediation

Customers using Phoenix Contact managed FL SWITCH devices with affected firmware versions are recommended to update the firmware to version 1.34 or higher which fixes this vulnerability. The updated firmware may be downloaded from the managed switch product page on the Phoenix Contact website:

Article No. Model Updated Firmware
2891030 FL SWITCH 3005 Download Firmware
2891032 FL SWITCH 3005T Download Firmware
2891033 FL SWITCH 3004T-FX Download Firmware
2891034 FL SWITCH 3004T-FX ST Download Firmware
2891031 FL SWITCH 3008 Download Firmware
2891035 FL SWITCH 3008T Download Firmware
2891036 FL SWITCH 3006T-2FX Download Firmware
2891037 FL SWITCH 3006T-2FX ST Download Firmware
2891067 FL SWITCH 3012E-2SFX Download Firmware
2891066 FL SWITCH 3016E Download Firmware
2891058 FL SWITCH 3016 Download Firmware
2891059 FL SWITCH 3016T Download Firmware
2891060 FL SWITCH 3006T-2FX SM Download Firmware
2891062 FL SWITCH 4008T-2SFP Download Firmware
2891061 FL SWITCH 4008T-2GT-4FX SM Download Firmware
2891160 FL SWITCH 4008T-2GT-3FX SM Download Firmware
2891073 FL SWITCH 4808E-16FX LC-4GC Download Firmware
2891080 FL SWITCH 4808E-16FX SM-4GC Download Firmware
2891086 FL SWITCH 4808E-16FX SM ST-4GC Download Firmware
2891085 FL SWITCH 4808E-16FX ST-4GC Download Firmware
2891079 FL SWITCH 4808E-16FX-4GC Download Firmware
2891074 FL SWITCH 4808E-16FX SM LC-4GC Download Firmware
2891063 FL SWITCH 4012T 2GT 2FX Download Firmware
2891161 FL SWITCH 4012T-2GT-2FX ST Download Firmware
2891072 FL SWITCH 4824E-4GC Download Firmware
2891102 FL SWITCH 4800E-24FX-4GC Download Firmware
2891104 FL SWITCH 4800E-24FX SM-4GC Download Firmware
2891120 FL SWITCH 3012E-2FX Download Firmware
2891119 FL SWITCH 3012E-2FX SM Download Firmware
2891162 FL SWITCH 4000T-8POE-2SFP-R please contact your local customer service

Revision History

Version Date Summary
1 05/16/2018 12:00 Initial revision.
2 05/28/2018 12:00 Update
3 05/14/2025 15:00 Fix: added distribution