9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.9 High
AI Score
Confidence
High
7.8 High
CVSS2
Access Vector
Access Complexity
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
0.003 Low
EPSS
Percentile
71.6%
Successful exploitation of these vulnerabilities could allow an unauthenticated attacker to reboot, cause denial-of-service conditions, and impact the system by other means through buffer overflow vulnerabilities.
The following Siemens products are affected:
Affected devices do not properly validate the HTTP headers of incoming requests. This could allow an unauthenticated remote attacker to crash affected devices.
CVE-2022-25751 has been assigned to this vulnerability. A CVSS v3 base score of 8.2 has been assigned; the CVSS vector string is (AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:H).
3.2.2 USE OF INSUFFICIENTLY RANDOM VALUES CWE-330
The webserver of affected devices calculates session ids and nonces in an insecure manner. This could allow an unauthenticated remote attacker to brute-force session ids and hijack existing sessions.
CVE-2022-25752 has been assigned to this vulnerability. A CVSS v3 base score of 8.8 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
The handling of arguments such as IP addresses in the CLI of affected devices is prone to buffer overflows. This could allow an authenticated remote attacker to execute arbitrary code on the device.
CVE-2022-25753 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been assigned; the CVSS vector string is (AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H).
The integrated web server of the affected device could allow remote attackers to perform actions with the permissions of a victim user, provided the victim user has an active session and is induced to trigger the malicious request.
CVE-2022-25754 has been assigned to this vulnerability. A CVSS v3 base score of 7.3 has been assigned; the CVSS vector string is (AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H).
The webserver of an affected device is missing specific security headers. This could allow a remote attacker to extract confidential session information under certain circumstances.
CVE-2022-25755 has been assigned to this vulnerability. A CVSS v3 base score of 2.6 has been assigned; the CVSS vector string is (AV:A/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N).
The integrated web server could allow Cross-Site Scripting (XSS) attacks if unsuspecting users are tricked into accessing a malicious link. This can be used by an attacker to trigger a malicious request on the affected device.
CVE-2022-25756 has been assigned to this vulnerability. A CVSS v3 base score of 7.9 has been assigned; the CVSS vector string is (AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H).
Affected devices do not properly validate the GET parameter XNo of incoming HTTP requests. This could allow an unauthenticated remote attacker to crash affected devices.
CVE-2022-26334 has been assigned to this vulnerability. A CVSS v3 base score of 8.2 has been assigned; the CVSS vector string is (AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H).
Affected devices do not properly validate the URI of incoming HTTP GET requests. This could allow an unauthenticated remote attacker to crash affected devices.
CVE-2022-26335 has been assigned to this vulnerability. A CVSS v3 base score of 9.6 has been assigned; the CVSS vector string is (AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).
Affected devices do not properly validate if a certain SNMP key exists. An attacker could use this to trigger a reboot of an affected device by requesting specific SNMP information from the device.
CVE-2022-26380 has been assigned to this vulnerability. A CVSS v3 base score of 7.4 has been assigned; the CVSS vector string is (AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H).
Michael Messner and Abian Blome of Siemens Energy coordinated the disclosure of CVE-2022-25751 and CVE-2022-25756 to CISA.
Siemens recommends upgrading all X-300 switch family devices to v4.1.4 or later.
Siemens has identified the following specific workarounds and mitigations users can apply to reduce the risk:
As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends users configure the environment according to the Siemens operational guidelines for industrial security and follow the recommendations in the product manuals.
For additional information, please refer to Siemens Security Advisory SSA-836527
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage on cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01BβTargeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents.
No known public exploits specifically target these vulnerabilities.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-25751
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-25752
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-25753
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-25754
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-25755
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-25756
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-26334
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-26335
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-26380
cert-portal.siemens.com/operational-guidelines-industrial-security.pdf
cert-portal.siemens.com/productcert/pdf/ssa-836527.pdf
cwe.mitre.org/data/definitions/120.html
cwe.mitre.org/data/definitions/120.html
cwe.mitre.org/data/definitions/121.html
cwe.mitre.org/data/definitions/125.html
cwe.mitre.org/data/definitions/20.html
cwe.mitre.org/data/definitions/284.html
cwe.mitre.org/data/definitions/330.html
cwe.mitre.org/data/definitions/352.html
cwe.mitre.org/data/definitions/80.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
support.industry.siemens.com/cs/ww/en/109808359
twitter.com/CISAgov
twitter.com/intent/tweet?text=Siemens%20SCALANCE%20X-300%20Switches+https://www.cisa.gov/news-events/ics-advisories/icsa-22-104-09
www.cisa.gov/uscert/ics
www.cisa.gov/uscert/ics
www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01
www.cisa.gov/uscert/ics/recommended-practices
www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B
www.cisa.gov/uscert/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.dhs.gov
www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
www.facebook.com/CISA
www.facebook.com/sharer/sharer.php?u=https://www.cisa.gov/news-events/ics-advisories/icsa-22-104-09&title=Siemens%20SCALANCE%20X-300%20Switches
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
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mailto:?subject=Siemens%20SCALANCE%20X-300%20Switches&body=www.cisa.gov/news-events/ics-advisories/icsa-22-104-09
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.9 High
AI Score
Confidence
High
7.8 High
CVSS2
Access Vector
Access Complexity
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
0.003 Low
EPSS
Percentile
71.6%