Vulnerability identifier: #VU52206

Vulnerability risk: Medium

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-27738

CWE-ID: CWE-788

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SIMOTICS CONNECT 400
Hardware solutions / Other hardware appliances

Vendor:

Description

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

The vulnerability exists due to the DNS domain name record decompression functionality does not properly validate the pointer offset values. A remote attacker can cause a denial of service condition on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

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External links
http://ics-cert.us-cert.gov/advisories/icsa-21-103-13
http://cert-portal.siemens.com/productcert/pdf/ssa-669158.pdf

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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.