#VU65271 Heap-based buffer overflow in Siemens products - CVE-2022-34819

Vulnerability identifier: #VU65271

Vulnerability risk: High

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

CVE-ID: CVE-2022-34819

CWE-ID: CWE-122

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable 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

Software vendor:
Siemens

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

The vulnerability exists due to a boundary error when parsing specific messages. A remote attacker can pass specially crafted data to the application, trigger a heap-based buffer overflow 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