Denial of service in Siemens KTK, SIDOOR, SIMATIC, and SINAMICS

1) Resource exhaustion

EUVDB-ID: #VU26965

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-2019-19300

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

KTK ATE530S: All versions

SIDOOR ATD430W: All versions

SIDOOR ATE530S COATED: All versions

SIDOOR ATE531S: All versions

SIMATIC ET200SP IM155-6 MF HF: All versions

SIMATIC ET 200SP Open Controller CPU 1515SP PC: before 2.0

SIMATIC ET 200SP Open Controller CPU 1515SP PC2: before 2.0

SIMATIC ET200MP IM155-5 PN HF: 4.2.0

SIMATIC ET200SP IM155-6 PN HA: All versions

SIMATIC ET200SP IM155-6 PN HF: 4.2

SIMATIC ET200SP IM155-6 PN/2 HF: 4.2

SIMATIC ET200SP IM155-6 PN/3 HF: 4.2

SIMATIC MICRO-DRIVE PDC: All versions

SIMATIC PN/PN Coupler: 4.2

SIMATIC S7-1500 CPU: before 2.0

SIMATIC S7-1500 Software Controller: before 2.0

SIMATIC S7-300: All versions

SIMATIC S7-400 PN/DP V7: All versions

SIMATIC S7-400 PN/DP V6: All versions

SIMATIC S7-410: All versions

SIMATIC TDC CP51M1: All versions

SIMATIC TDC CPU555: All versions

SIMATIC WinAC RTX (F) 2010: All versions

SINAMICS S/G Control Unit w. PROFINET: All versions

CPE2.3

• cpe:2.3:h:siemens:ktk_ate530s:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:sidoor_atd430w:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:sidoor_ate530s_coated:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:sidoor_ate531s:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:simatic_et200sp_im155-6_mf_hf:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:simatic_et_200sp_open_controller_cpu_1515sp_pc:*:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:simatic_et_200sp_open_controller_cpu_1515sp_pc2:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:simatic_et200mp_im155-5_pn_hf:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:simatic_et200mp_im155-5_pn_hf:4.2.0:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:simatic_et200sp_im155-6_pn_ha:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:simatic_et200sp_im155-6_pn_hf:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:simatic_et200sp_im155-6_pn_2_hf:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:simatic_et200sp_im155-6_pn_3_hf:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:simatic_micro-drive_pdc:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:simatic_pn_pn_coupler:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:simatic_s7-1500_cpu:*:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:simatic_s7-1500_software_controller:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:simatic_s7-300:*:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:simatic_s7-400_pn_dp_v7:*:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:simatic_s7-400_pn_dp_v6:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:simatic_s7-410:*:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:simatic_tdc_cp51m1:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:simatic_tdc_cpu555:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:simatic_winac_rtx_f_2010:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:sinamics_s_g_control_unit_w._profinet:*:*:*:*:*:*:*:*

External links

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

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.