Vulnerability identifier: #VU49953

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-27274

CWE-ID: CWE-754

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OPC UA Tunneller
Other software / Other software solutions

Vendor:

Description

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

The vulnerability exists due to some parsing functions do not check the return value of malloc and the thread handling the message is forced to close. A remote attacker can cause denial of service condition.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

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External links
http://ics-cert.us-cert.gov/advisories/icsa-21-021-03

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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.