#VU75038 Allocation of Resources Without Limits or Throttling in Siemens products - CVE-2022-43768

Vulnerability identifier: #VU75038

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-43768

CWE-ID: CWE-770

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SIMATIC CP 1242-7 V2
Hardware solutions / Firmware
SIMATIC CP 1243-1
Hardware solutions / Firmware
SIMATIC CP 1243-1 DNP3
Hardware solutions / Firmware
SIMATIC CP 1243-1 IEC
Hardware solutions / Firmware
SIMATIC CP 1243-7 LTE EU
Hardware solutions / Firmware
SIMATIC CP 1243-7 LTE US
Hardware solutions / Firmware
SIMATIC CP 1243-8 IRC
Hardware solutions / Firmware
SIMATIC CP 1542SP-1
Hardware solutions / Firmware
SIMATIC CP 1542SP-1 IRC
Hardware solutions / Firmware
SIMATIC CP 1543SP-1
Hardware solutions / Firmware
SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL
Hardware solutions / Firmware
SIPLUS ET 200SP CP 1543SP-1 ISEC
Hardware solutions / Firmware
SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL
Hardware solutions / Firmware
SIPLUS NET CP 1242-7 V2
Hardware solutions / Firmware
SIPLUS S7-1200 CP 1243-1
Hardware solutions / Firmware
SIPLUS S7-1200 CP 1243-1 RAIL
Hardware solutions / Firmware
SIMATIC CP 443-1
Hardware solutions / Firmware
SIPLUS NET CP 443-1
Hardware solutions / Firmware
SIPLUS NET CP 443-1 Advanced
Hardware solutions / Firmware
SIPLUS TIM 1531 IRC
Hardware solutions / Firmware
TIM 1531 IRC
Hardware solutions / Firmware
SIMATIC IPC DiagBase
Server applications / SCADA systems
SIMATIC IPC DiagMonitor
Server applications / SCADA systems
SIMATIC CP 443-1 Advanced
Server applications / SCADA systems

Vendor: Siemens

Description

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

The vulnerability exists due to allocation of resources without limits or throttling. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SIMATIC CP 1242-7 V2: All versions

SIMATIC CP 1243-1: All versions

SIMATIC CP 1243-1 DNP3: All versions

SIMATIC CP 1243-1 IEC: All versions

SIMATIC CP 1243-7 LTE EU: All versions

SIMATIC CP 1243-7 LTE US: All versions

SIMATIC CP 1243-8 IRC: All versions

SIMATIC CP 1542SP-1: All versions

SIMATIC CP 1542SP-1 IRC: All versions

SIMATIC CP 1543SP-1: All versions

SIMATIC IPC DiagBase: All versions

SIMATIC IPC DiagMonitor: All versions

SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL: All versions

SIPLUS ET 200SP CP 1543SP-1 ISEC: All versions

SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL: All versions

SIPLUS NET CP 1242-7 V2: All versions

SIPLUS S7-1200 CP 1243-1: All versions

SIPLUS S7-1200 CP 1243-1 RAIL: All versions

SIMATIC CP 443-1: before 3.3

SIMATIC CP 443-1 Advanced: before 3.3

SIPLUS NET CP 443-1: before 3.3

SIPLUS NET CP 443-1 Advanced: before 3.3

SIPLUS TIM 1531 IRC: before 2.3.6

TIM 1531 IRC: before 2.3.6

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External links
https://cert-portal.siemens.com/productcert/pdf/ssa-566905.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.