Denial of service in Siemens Industrial Products

1) NULL pointer dereference

EUVDB-ID: #VU63304

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-45117

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a NULL pointer dereference error in the OPC autogenerated ANSI C stack stubs. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

TeleControl Server: 3

SIMATIC NET PC Software: 14 - 17

SITOP Manager: All versions

CPE2.3

• cpe:2.3:a:siemens:telecontrol_server:3:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:simatic_net_pc_software:14:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:simatic_net_pc_software:15:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:simatic_net_pc_software:16:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:sitop_manager:*:*:*:*:*:*:*:*

External links

https://cert-portal.siemens.com/productcert/txt/ssa-285795.txt

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.