#VU75031 Inadequate Encryption Strength in Siemens products - CVE-2023-29054

Vulnerability identifier: #VU75031

Vulnerability risk: Medium

CVSSv4.0: 2 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:A/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-29054

CWE-ID: CWE-326

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
SCALANCE X200-4P IRT
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE X201-3P IRT
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE X201-3P IRT PRO
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE X202-2IRT
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE X202-2P IRT
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE X202-2P IRT PRO
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE X204IRT
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE X204IRT PRO
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE XF201-3P IRT
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE XF202-2P IRT
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE XF204-2BA IRT
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE XF204IRT
Hardware solutions / Routers & switches, VoIP, GSM, etc
SIPLUS NET SCALANCE X202-2P IRT
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Siemens

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the SSH server is configured to offer weak ciphers by default. A remote attacker on the local network can perform a man-in-the-middle attack to read and modify any data passed over the connection between legitimate clients and the affected device.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SCALANCE X200-4P IRT: before 5.5.2

SCALANCE X201-3P IRT: before 5.5.2

SCALANCE X201-3P IRT PRO: before 5.5.2

SCALANCE X202-2IRT: before 5.5.2

SCALANCE X202-2P IRT: before 5.5.2

SCALANCE X202-2P IRT PRO: before 5.5.2

SCALANCE X204IRT: before 5.5.2

SCALANCE X204IRT PRO: before 5.5.2

SCALANCE XF201-3P IRT: before 5.5.2

SCALANCE XF202-2P IRT: before 5.5.2

SCALANCE XF204-2BA IRT: before 5.5.2

SCALANCE XF204IRT: before 5.5.2

SIPLUS NET SCALANCE X202-2P IRT: before 5.5.2

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External links
https://cert-portal.siemens.com/productcert/pdf/ssa-479249.pdf

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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.