CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS4
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/SC:H/VI:H/SI:H/VA:H/SA:H
AI Score
Confidence
High
EPSS
Percentile
59.6%
As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens’ ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
Successful exploitation of these vulnerabilities could allow an attacker to inject code or spawn a system root shell.
The following products of Siemens, are affected:
3.2.1 IMPROPER VALIDATION OF SPECIFIED QUANTITY IN INPUT CWE-1284
Affected devices do not check the TFTP blocksize correctly. This could allow an authenticated attacker to read from an uninitialized buffer that potentially contains previously allocated data.
CVE-2022-46143 has been assigned to this vulnerability. A CVSS v3 base score of 2.7 has been assigned; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N).
3.2.2 USE OF HARD-CODED CRYPTOGRAPHIC KEY CWE-321
Affected devices use a hard-coded key to obfuscate the configuration backup that an administrator can export from the device. This could allow an authenticated attacker with administrative privileges or an attacker that obtains a configuration backup to extract configuration information from the exported file.
CVE-2023-44318 has been assigned to this vulnerability. A CVSS v3 base score of 4.9 has been assigned; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N).
3.2.3 USE OF WEAK HASH CWE-328
Affected devices use a weak checksum algorithm to protect the configuration backup that an administrator can export from the device. This could allow an authenticated attacker with administrative privileges or an attacker that tricks a legitimate administrator to upload a modified configuration file to change the configuration of an affected device.
CVE-2023-44319 has been assigned to this vulnerability. A CVSS v3 base score of 4.9 has been assigned; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N).
3.2.4 DIRECT REQUEST (‘FORCED BROWSING’) CWE-425
Affected devices do not properly validate the authentication when performing certain modifications in the web interface allowing an authenticated attacker to influence the user interface configured by an administrator.
CVE-2023-44320 has been assigned to this vulnerability. A CVSS v3 base score of 4.3 has been assigned; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N).
3.2.5 UNCONTROLLED RESOURCE CONSUMPTION CWE-400
Affected devices do not properly validate the length of inputs when performing certain configuration changes in the web interface allowing an authenticated attacker to cause a denial of service condition. The device needs to be restarted for the web interface to become available again.
CVE-2023-44321 has been assigned to this vulnerability. A CVSS v3 base score of 2.7 has been assigned; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L).
3.2.6 UNCHECKED RETURN VALUE CWE-252
Affected devices can be configured to send emails when certain events occur on the device. When presented with an invalid response from the SMTP server, the device triggers an error that disrupts email sending. An attacker with access to the network can use this to do disable notification of users when certain events occur.
CVE-2023-44322 has been assigned to this vulnerability. A CVSS v3 base score of 3.7 has been assigned; the CVSS vector string is (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L).
Affected devices do not properly sanitize an input field. This could allow an authenticated remote attacker with administrative privileges to inject code or spawn a system root shell. Follow-up of CVE-2022-36323.
CVE-2023-44373 has been assigned to this vulnerability. A CVSS v3 base score of 9.1 has been assigned; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H).
3.2.8 UNSYNCHRONIZED ACCESS TO SHARED DATA IN A MULTITHREADED CONTEXT CWE-567
Affected devices allow to change the password, but insufficiently check which password is to be changed. With this an authenticated attacker could, under certain conditions, be able to change the password of another, potential admin user allowing her to escalate her privileges.
CVE-2023-44374 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been assigned; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N).
3.2.9 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN OS COMMAND (‘OS COMMAND INJECTION’) CWE-78
An improper neutralization of special elements used in an OS command with root privileges vulnerability exists in the handling of the DDNS configuration. This could allow malicious local administrators to issue commands on system level after a successful IP address update.
CVE-2023-49691 has been assigned to this vulnerability. A CVSS v3 base score of 7.2 has been assigned; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).
Siemens reported these vulnerabilities to CISA.
Siemens has released a new version for SCALANCE M-800 / S615 and recommends users update to the latest version. Siemens recommends countermeasures for products where fixes are not, or not yet available:
For CVE-2022-46143, CVE-2023-44319, CVE-2023-44322, CVE-2023-44373, CVE-2023-44374, CVE-2023-49691:
For CVE-2023-44318, CVE-2023-44320, CVE-2023-44321:
As a general security measure, Siemens recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’ operational guidelines for industrial security and following recommendations in the product manuals.
Additional information on industrial security by Siemens can be found on the Siemens industrial security webpage.
For more information see the associated Siemens security advisory SSA-180704 in HTML and CSAF.
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities, such as:
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 CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
CISA also recommends users take the following measures to protect themselves from social engineering attacks:
No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-46143
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-44318
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-44319
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-44320
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-44321
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-44322
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-44373
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-44374
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-49691
cert-portal.siemens.com/productcert/csaf/ssa-180704.json
cert-portal.siemens.com/productcert/html/ssa-180704.html
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-advisories/icsa-23-348-14
cwe.mitre.org/data/definitions/1284.html
cwe.mitre.org/data/definitions/252.html
cwe.mitre.org/data/definitions/321.html
cwe.mitre.org/data/definitions/328.html
cwe.mitre.org/data/definitions/400.html
cwe.mitre.org/data/definitions/425.html
cwe.mitre.org/data/definitions/567.html
cwe.mitre.org/data/definitions/74.html
cwe.mitre.org/data/definitions/78.html
github.com/cisagov/CSAF
new.siemens.com/global/en/products/services/cert.html#SecurityPublications
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
support.industry.siemens.com/cs/ww/en/view/109826372/%5D
twitter.com/CISAgov
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us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.cisa.gov/resources-tools/resources/ics-recommended-practices
www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf
www.cisa.gov/topics/industrial-control-systems
www.cisa.gov/topics/industrial-control-systems
www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01
www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B
www.cisa.gov/uscert/ncas/tips/ST04-014
www.cisa.gov/uscert/sites/default/files/publications/emailscams0905.pdf
www.dhs.gov
www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
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CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS4
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/SC:H/VI:H/SI:H/VA:H/SA:H
AI Score
Confidence
High
EPSS
Percentile
59.6%