#VU70421 Improper control of a resource through its lifetime in Siemens products - CVE-2022-46144

Vulnerability identifier: #VU70421

Vulnerability risk: Medium

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

CVE-ID: CVE-2022-46144

CWE-ID: CWE-664

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SCALANCE SC622-2C
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE SC626-2C
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE SC632-2C
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE SC636-2C
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE SC642-2C
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE SC646-2C
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Siemens

Description

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

The vulnerability exists due to the affected device does not properly process CLI commands after a user forcefully quitted the SSH connection. A remote user can cause a denial of service condition on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SCALANCE SC622-2C: before 3.0

SCALANCE SC626-2C: before 3.0

SCALANCE SC632-2C: before 3.0

SCALANCE SC636-2C: before 3.0

SCALANCE SC642-2C: before 3.0

SCALANCE SC646-2C: before 3.0

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External links
https://cert-portal.siemens.com/productcert/pdf/ssa-413565.pdf

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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