CVE-2024-33895: ewon cosy\+ wifi — Exploit

Description

Cosy+ devices running a firmware 21.x below 21.2s10 or a firmware 22.x below 22.1s3 use a unique key to encrypt the configuration parameters. This is fixed in version 21.2s10 and 22.1s3, the key is now unique per device.

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CVSS v3.1 Score

6.6

MEDIUM

CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-798 CWE-798

Affected Products

Vendor	Product	Versions
hms-networks	ewon_cosy\+_firmware	21.0 — 21.2s10
hms-networks	ewon_cosy\+_firmware	22.0 — 22.1s3
hms-networks	ewon_cosy\+_4g_apac	All
hms-networks	ewon_cosy\+_4g_eu	All
hms-networks	ewon_cosy\+_4g_jp	All
hms-networks	ewon_cosy\+_4g_na	All
hms-networks	ewon_cosy\+_ethernet	All
hms-networks	ewon_cosy\+_wifi	All

References

Advisories & Patches

https://hmsnetworks.blob.core.windows.net/nlw/docs/default-source/products/cybersecurity/security-advisory/hms-security-advisory-2024-07-29-001--ewon-several-cosy--vulnerabilities.pdf https://www.hms-networks.com/cyber-security

Exploits

https://blog.syss.com/posts/hacking-a-secure-industrial-remote-access-gateway/

Other References

https://www.ewon.biz/products/cosy/ewon-cosy-wifi http://seclists.org/fulldisclosure/2024/Aug/22

Frequently Asked Questions

What is CVE-2024-33895? +

Cosy+ devices running a firmware 21.x below 21.2s10 or a firmware 22.x below 22.1s3 use a unique key to encrypt the configuration parameters. This is fixed in version 21.2s10 and 22.1s3, the key is now unique per device. It has a CVSS v3.1 base score of 6.6 (MEDIUM).

How severe is CVE-2024-33895? +

CVE-2024-33895 has a CVSS v3.1 score of 6.6 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-33895? +

CVE-2024-33895 affects products from hms-networks, specifically: ewon_cosy\+_4g_apac, ewon_cosy\+_4g_eu, ewon_cosy\+_4g_jp, ewon_cosy\+_4g_na, ewon_cosy\+_ethernet, ewon_cosy\+_firmware, ewon_cosy\+_wifi. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-33895? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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