Denial of service in Siemens SCALANCE Products

1) Allocation of Resources Without Limits or Throttling

EUVDB-ID: #VU66369

Risk: Medium

CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2022-36324

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

Exploit availability: No

Description

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

The vulnerability exists due to the affected devices do not properly handle the renegotiation of SSL/TLS parameters. A remote attacker can bypass the TCP brute force prevention and cause a denial of service condition on the target system.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

SCALANCE M-800 / S615: All versions

SCALANCE W-700 (IEEE 802.11ax): All versions

SCALANCE W-700 (IEEE 802.11n): All versions

SCALANCE W-1700 (IEEE 802.11ac): All versions

SCALANCE XB-200: All versions

SCALANCE XC-200: All versions

SCALANCE XF-200BA: All versions

SCALANCE XM-400: All versions

SCALANCE XP-200: All versions

SCALANCE XR-300WG: All versions

SCALANCE XR-500: All versions

External links

http://cert-portal.siemens.com/productcert/txt/ssa-710008.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.