#VU65293 Use of insufficiently random values in Siemens products - CVE-2022-26647

Vulnerability identifier: #VU65293

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2022-26647

CWE-ID: CWE-330

Exploitation vector: 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
SCALANCE X204-2
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE X204-2FM
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE X204-2LD
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE X204-2LD TS
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE X204-2TS
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE X206-1
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE X206-1LD
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE X208
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE X208PRO
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE X212-2
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE X212-2LD
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE X216
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE X224
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE XF204
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE XF204-2
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE XF206-1
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE XF208
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 webserver of affected devices calculates session ids and nonces in an insecure manner. A remote attacker can brute-force session ids and hijack existing sessions.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SCALANCE X200-4P IRT: All versions

SCALANCE X201-3P IRT: All versions

SCALANCE X201-3P IRT PRO: All versions

SCALANCE X202-2IRT: All versions

SCALANCE X202-2P IRT: All versions

SCALANCE X202-2P IRT PRO: All versions

SCALANCE X204IRT: All versions

SCALANCE X204IRT PRO: All versions

SCALANCE XF201-3P IRT: All versions

SCALANCE XF202-2P IRT: All versions

SCALANCE XF204-2BA IRT: All versions

SCALANCE XF204IRT: All versions

SCALANCE X204-2: before 5.2.6

SCALANCE X204-2FM: before 5.2.6

SCALANCE X204-2LD: before 5.2.6

SCALANCE X204-2LD TS: before 5.2.6

SCALANCE X204-2TS: before 5.2.6

SCALANCE X206-1: before 5.2.6

SCALANCE X206-1LD: before 5.2.6

SCALANCE X208: before 5.2.6

SCALANCE X208PRO: before 5.2.6

SCALANCE X212-2: before 5.2.6

SCALANCE X212-2LD: before 5.2.6

SCALANCE X216: before 5.2.6

SCALANCE X224: before 5.2.6

SCALANCE XF204: before 5.2.6

SCALANCE XF204-2: before 5.2.6

SCALANCE XF206-1: before 5.2.6

SCALANCE XF208: before 5.2.6

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External links
https://cert-portal.siemens.com/productcert/pdf/ssa-310038.pdficsa-22-195-01

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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 Internet.

Is there known malware, which exploits this vulnerability?

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