#VU51691 Resource exhaustion in Ovarro products - CVE-2021-22642

Vulnerability identifier: #VU51691

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-22642

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

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

Vendor: Ovarro

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources. A remote attacker can use specially crafted invalid Modbus frames, trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

TBox LT2: All versions

TBox RM2: All versions

TBox TG2: All versions

TBox MS-CPU32: before 1.46

TBox MS-CPU32-S2: before 1.46

TWinSoft: before 12.4

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External links
https://ics-cert.us-cert.gov/advisories/icsa-21-054-04

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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.