Vulnerability identifier: #VU62460

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-2021-40368

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SIMATIC S7-400 PN/DP V7
Server applications / SCADA systems
SIMATIC S7-410 V8
Hardware solutions / Firmware
SIMATIC S7-400 H V6
Hardware solutions / Firmware
SIMATIC S7-410 V10
Hardware solutions / Firmware

Vendor: Siemens

Description

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

The vulnerability exists due to a boundary error. A remote attacker can trigger memory corruption and cause a denial of service condition on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SIMATIC S7-400 PN/DP V7: All versions

SIMATIC S7-410 V8: All versions

---

External links
http://cert-portal.siemens.com/productcert/pdf/ssa-557541.pdf

---

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.