#VU26965 Resource exhaustion in Siemens products - CVE-2019-19300

Vulnerability identifier: #VU26965

Vulnerability risk: Medium

CVSSv4.0: 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-2019-19300

CWE-ID: CWE-400

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
KTK ATE530S
SIDOOR ATD430W
SIDOOR ATE530S COATED
SIDOOR ATE531S
SIMATIC ET200SP IM155-6 MF HF
SIMATIC ET 200SP Open Controller CPU 1515SP PC
SIMATIC ET200SP IM155-6 PN HA
SIMATIC ET200SP IM155-6 PN/2 HF
SIMATIC ET200SP IM155-6 PN/3 HF
SIMATIC MICRO-DRIVE PDC
SIMATIC TDC CPU555
SINAMICS S/G Control Unit w. PROFINET
SIMATIC ET 200SP Open Controller CPU 1515SP PC2
SIMATIC S7-1500 Software Controller
SIMATIC S7-400 PN/DP V7
SIMATIC S7-400 PN/DP V6
SIMATIC TDC CP51M1
SIMATIC ET200MP IM155-5 PN HF
SIMATIC ET200SP IM155-6 PN HF
SIMATIC PN/PN Coupler
SIMATIC S7-1500 CPU
SIMATIC S7-300
SIMATIC S7-410
SIMATIC WinAC RTX (F) 2010

Software vendor:
Siemens

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

The vulnerability exists due to the Interniche-based TCP stack can be forced to make resource intense calls for every incoming packet. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Install updates from vendor's website.

• https://cert-portal.siemens.com/productcert/pdf/ssa-593272.pdf