Vulnerability identifier: #VU48916

Vulnerability risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-13988

CWE-ID: CWE-190

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
SENTRON PAC3200
Hardware solutions / Other hardware appliances
SENTRON PAC4200
Hardware solutions / Other hardware appliances
SIRIUS 3RW5 communication module Modbus TCP
Client/Desktop applications / Software for archiving

Vendor: Siemens

Description

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

The vulnerability exists due to integer overflow. A remote attacker on the local network can send a specially crafted IP packet, trigger integer overflow and cause a denial of service on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SENTRON PAC3200: All versions

SENTRON PAC4200: All versions

SIRIUS 3RW5 communication module Modbus TCP: All versions

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External links
http://ics-cert.us-cert.gov/advisories/icsa-20-343-05

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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 local network (LAN).

Is there known malware, which exploits this vulnerability?

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