#VU56659 Improper access control in SINEMA Remote Connect Server - CVE-2021-37183

Vulnerability identifier: #VU56659

Vulnerability risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-37183

CWE-ID: CWE-284

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
SINEMA Remote Connect Server
Server applications / SCADA systems

Vendor: Siemens

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to the affected software allows sending send-to-sleep notifications to the managed devices. A remote attacker on the local network can cause a denial of service condition on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SINEMA Remote Connect Server: before 3.0

---

External links
https://cert-portal.siemens.com/productcert/pdf/ssa-334944.pdf

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.