Vulnerability identifier: #VU56625

Vulnerability risk: Medium

CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2021-33737

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SIMATIC CP 343-1 Advanced
Server applications / SCADA systems
SIMATIC CP 343-1 Standard
Server applications / SCADA systems
SIMATIC CP 343-1 ERPC
Hardware solutions / Firmware
SIMATIC CP 343-1 LEAN
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 send a specially crafted packet, trigger memory corruption and cause a denial of service condition on the target system.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

SIMATIC CP 343-1 Advanced: All versions

SIMATIC CP 343-1 Standard: All versions

SIMATIC CP 343-1 ERPC: All versions

SIMATIC CP 343-1 LEAN: All versions

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External links
http://cert-portal.siemens.com/productcert/pdf/ssa-549234.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.