Code Injection in Siemens products - CVE-2022-34821

Vulnerability identifier: #VU65274

CSH Severity: Low

CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

CVE-ID: CVE-2022-34821

CWE-ID: CWE-94

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

Vendor: Siemens

Affected software:
SIMATIC CP 1242-7 V2
SIMATIC CP 1243-1
SIMATIC CP 1243-7 LTE EU
SIMATIC CP 1243-7 LTE US
SIMATIC CP 1243-8 IRC
SIMATIC CP 1542SP-1 IRC
SIMATIC CP 1543SP-1
SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL
SIPLUS ET 200SP CP 1543SP-1 ISEC
SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL
SIPLUS NET CP 1242-7 V2
SIPLUS S7-1200 CP 1243-1
SIPLUS S7-1200 CP 1243-1 RAIL
SIMATIC CP 1543-1
SIPLUS NET CP 1543-1

The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation within the specific configuration options for OpenVPN. A remote administrator on the local network can send a specially crafted request and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Install update from vendor's website.

• https://cert-portal.siemens.com/productcert/pdf/ssa-517377.pdficsa-22-195-12