#VU77824 Insufficient Entropy in Ovarro products - CVE-2023-36610

Vulnerability identifier: #VU77824

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-36610

CWE-ID: CWE-331

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
TBox MS-CPU32
Hardware solutions / Firmware
TBox MS-CPU32-S2
Hardware solutions / Firmware
TBox LT2
Hardware solutions / Firmware
TBox TG2
Hardware solutions / Firmware
TBox RM2
Hardware solutions / Firmware

Vendor: Ovarro

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the affected TBox RTUs generate software security tokens using insufficient entropy. A remote attacker can brute-force the token and authenticate themselves.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

TBox MS-CPU32: 1.50.598

TBox MS-CPU32-S2: 1.50.598

TBox LT2: 1.50.598

TBox TG2: 1.50.598

TBox RM2: 1.50.598

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External links
https://www.cisa.gov/news-events/ics-advisories/icsa-23-180-03

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.