#VU48916 Integer overflow in Siemens products - CVE-2020-13988

Vulnerability identifier: #VU48916

Vulnerability risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

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: before 2.4.5

SENTRON PAC4200: before 2.0.1

SIRIUS 3RW5 communication module Modbus TCP: All versions

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External links
https://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.