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
EPSS
Percentile
72.0%
Exploitation of these vulnerabilities could result in a denial-of-service condition, hijacking of web sessions, and the loss of confidential or sensitive information.
The following Siemens software is affected:
The integrated web server could allow cross-site scripting (XSS) attacks if unsuspecting users are tricked into accessing a malicious link, which an attacker could use to trigger a malicious request on the affected device.
CVE-2022-46350 has been assigned to this vulnerability. A CVSS v3 base score of 7.9 has been calculated. the CVSS vector string is (CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H)
Specially crafted PROFINET DCP packets could cause a denial-of-service condition of affected products on a local Ethernet segment (Layer 2).
CVE-2022-46351 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been calculated. the CVSS vector string is (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Specially crafted PROFINET DCP packets could cause a denial-of-service condition of affected products.
CVE-2022-46352 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated. the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
The webserver of affected devices insecurely calculates session IDs and nonces. This could allow an unauthenticated remote attacker to brute-force session IDs and hijack existing sessions.
CVE-2022-46353 has been assigned to this vulnerability. A CVSS v3 base score of 8.8 has been calculated. the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
The webservers of affected devices are missing specific security headers. This could allow a remote attacker to extract confidential session information under certain circumstances.
CVE-2022-46354 has been assigned to this vulnerability. A CVSS v3 base score of 2.6 has been calculated. the CVSS vector string is (CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N)
The affected products are vulnerable to an exposure of sensitive information to an unauthorized actor vulnerability by leaking sensitive data in the HTTP Referer.
CVE-2022-46355 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been calculated. the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N)
Siemens reported these vulnerabilities to CISA.
Siemens released updates for the affected products and recommends updating to the latest versions:
Siemens identified the following specific workarounds and mitigations users can apply to reduce risk:
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 the recommendations in the product manuals.
Additional information on industrial security by Siemens can be found on the Siemens Industrial Security webpage.
For further inquiries on security vulnerabilities in Siemens products, users should contact Siemens ProductCERT.
For more information, see the associated Siemens security advisory SSA-363821 in HTML and CSAF.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability these vulnerabilities. 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 at cisa.gov/ics. 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.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics 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 exploits specifically target these vulnerabilities. These vulnerabilities are exploitable remotely. These vulnerabilities have a low attack complexity.
cert-portal.siemens.com/productcert/csaf/ssa-363821.json
cert-portal.siemens.com/productcert/html/ssa-363821.html
cisa.gov/ics
cisa.gov/ics
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cwe.mitre.org/data/definitions/200.html
cwe.mitre.org/data/definitions/284.html
cwe.mitre.org/data/definitions/330.html
cwe.mitre.org/data/definitions/400.html
cwe.mitre.org/data/definitions/400.html
cwe.mitre.org/data/definitions/80.html
nvd.nist.gov/vuln/detail/CVE-2022-46350
nvd.nist.gov/vuln/detail/CVE-2022-46351
nvd.nist.gov/vuln/detail/CVE-2022-46352
nvd.nist.gov/vuln/detail/CVE-2022-46353
nvd.nist.gov/vuln/detail/CVE-2022-46354
nvd.nist.gov/vuln/detail/CVE-2022-46355
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
support.industry.siemens.com/cs/ww/en/view/109814809/
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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/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/emailscams_0905.pdf
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