9.6 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
0.003 Low
EPSS
Percentile
66.1%
Successful exploitation of this these vulnerabilities could execute code in the context of the userβs browser or cause a denial of service.
Phoenix contact reports that the following products are affected:
3.2.1 Cross-site Scripting CWE-79
In PHOENIX CONTACT TC ROUTER and TC CLOUD CLIENT prior to version 2.07.2 as well as CLOUD CLIENT 1101T-TX/TX prior to version 2.06.10 an unauthenticated remote attacker could use a reflective XSS within the license viewer page of the devices in order to execute code in the context of the userβs browser.
CVE-2023-3526 has been assigned to this vulnerability. A CVSS v3 base score of 9.6 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H).
3.2.2 XML Entity Expansion CWE-776
In PHOENIX CONTACT TC ROUTER and TC CLOUD CLIENT prior to version 2.07.2 as well as CLOUD CLIENT 1101T-TX/TX prior to version 2.06.10 an authenticated remote attacker with admin privileges could upload a crafted XML file which causes a denial of service.
CVE-2023-3569 has been assigned to this vulnerability. A CVSS v3 base score of 4.9 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).
A. Resanovic and S. Stockinger at St. PΓΆlten UAS discovered these vulnerabilities. T. Weber of CyberDanube Security Research coordinated the vulnerabilities with Phoenix Contact.
Phoenix Contact has made the following fixed versions available and encourages users to download the latest version:
Phoenix Contact recommends operating network-capable devices in closed networks or protected with a suitable firewall. For detailed information on their recommendations for measures to protect network-capable devices, please refer to this application note βMeasures to protect network-capable devices with Ethernet connectionβ
Phoenix Contact published a security advisory
CERT@VDE published VDE-2023-017
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/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.
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/ics in the technical information paper, ICS-TIP-12-146-01BβTargeted 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-2023-3526
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-3569
cert.vde.com/en/advisories/VDE-2023-017/
cwe.mitre.org/data/definitions/776.html
cwe.mitre.org/data/definitions/79.html
dam-mdc.phoenixcontact.com/asset/156443151564/0a870ae433c19148b80bd760f3a1c1f2/107913_en_03.pdf
dam-mdc.phoenixcontact.com/asset/156443151564/201b4b3bbc78f9419818f6feaafa57d5/Security_Advisory_CVE-2023-3526_CVE-2023-3569.pdf
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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
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www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
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