6.5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:P/I:P/A:P
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 High
AI Score
Confidence
High
0.016 Low
EPSS
Percentile
87.6%
CVSS v3 8.0
ATTENTION: Exploitable remotely/Low skill level to exploit/Public exploits are available
**Vendor:**WAGO
**Equipment:**e!DISPLAY Web-Based-Management (WBM)
Vulnerabilities: Cross-site Scripting, Unrestricted Upload of File with Dangerous Type, and Incorrect Permissions for Critical Resource
Successful exploitation of these vulnerabilities could allow an attacker to execute code in the context of the user, execute code within the userβs browser, place malicious files within the filesystem, and replace existing files to allow privilege escalation.
The following versions of WAGO e!DISPLAY, an HMI, running firmware FW 01 are affected:
3.2.1 IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION (βCROSS-SITE SCRIPTINGβ) CWE-79
Authenticated and unauthenticated users can send specially crafted requests to the web server, which allows code injection within the WBM. The code will be rendered and/or executed within the userβs browser.
CVE-2018-12981 has been assigned to this vulnerability. A CVSS v3 base score of 8.0 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H).
3.2.2 UNRESTRICTED UPLOAD OF FILE WITH DANGEROUS TYPE CWE-434
This vulnerability allows an authenticated user to upload arbitrary files to the file system with the permissions of the web server.
CVE-2018-12980 has been assigned to this vulnerability. A CVSS v3 base score of 8.0 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H).
3.2.3 INCORRECT PERMISSION FOR CRITICAL RESOURCE CWE-732
Weak permissions allow an authenticated user to overwrite critical files by abusing the unrestricted file upload in the WBM.
CVE-2018-12979 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H).
T. Weber of SEC Consult reported these vulnerabilities to CERT@VDE, who reported them to NCCIC.
WAGO recommends affected users update to the latest firmware (FW 02). Contact WAGO support for update files and specific instructions.
WAGO also recommends the following mitigations:
WAGO has published a security advisory that can be viewed here:
https://www.wago.com/medias/SA-WBM-2018-004.pdf
NCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
NCCIC also provides a section for control systems security recommended practices on the ICS-CERT web page. 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-CERT website 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 NCCIC for tracking and correlation against other incidents.
NCCIC also recommends that users take the following measures to protect themselves from social engineering attacks:
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-12979
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-12980
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-12981
cwe.mitre.org/data/definitions/434.html
cwe.mitre.org/data/definitions/732.html
cwe.mitre.org/data/definitions/79.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=WAGO%20e%21DISPLAY%20Web-Based-Management+https://www.cisa.gov/news-events/ics-advisories/icsa-18-198-02
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-18-198-02&title=WAGO%20e%21DISPLAY%20Web-Based-Management
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
www.instagram.com/cisagov
www.linkedin.com/company/cybersecurity-and-infrastructure-security-agency
www.linkedin.com/sharing/share-offsite/?url=https://www.cisa.gov/news-events/ics-advisories/icsa-18-198-02
www.oig.dhs.gov/
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-18-198-02
www.usa.gov/
www.wago.com/medias/SA-WBM-2018-004.pdf?context=bWFzdGVyfHJvb3R8MjgyNzYwfGFwcGxpY2F0aW9uL3BkZnxoMWUvaDg4LzkzNjE3NTIxOTUxMDIucGRmfDU1NmJkYjEzNDY0ZGU4OWQ1OTMyMjUwNTlmZTI0MzgwNDQ1MDY1YzU3OWRmZDk1NzYzODAwMDI3ODg1NDJlZjU
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=WAGO%20e%21DISPLAY%20Web-Based-Management&body=www.cisa.gov/news-events/ics-advisories/icsa-18-198-02
6.5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:P/I:P/A:P
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 High
AI Score
Confidence
High
0.016 Low
EPSS
Percentile
87.6%