CVE-2024-33895

EUVD-2024-31599
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.6 MEDIUM
PHYSICAL
LOW
NONE
CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CISA-ADPADP
6.6 MEDIUM
PHYSICAL
LOW
NONE
CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 59%
Affected Products (NVD)
VendorProductVersion
hms-networksewon_cosy\+_firmware
21.0 ≤
𝑥
≤ 21.2s10
hms-networksewon_cosy\+_firmware
22.0 ≤
𝑥
≤ 22.1s3
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://blog.syss.com/posts/hacking-a-secure-industrial-remote-access-gateway/
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.ewon.biz/products/cosy/ewon-cosy-wifi
https://www.hms-networks.com/cyber-security
http://seclists.org/fulldisclosure/2024/Aug/22