6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.5 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
44.1%
CVSS v3 7.8
ATTENTION: Low skill level to exploit
Vendor: Schneider Electric
Equipment: Eurotherm by Schneider Electric GUIcon
Vulnerabilities: Type Confusion, Stack-based Buffer Overflow
Successful exploitation of these vulnerabilities may allow an attacker to execute code with privileges within the context of the application.
The following product is affected:
3.2.1 ACCESS OF RESOURCE USING INCOMPATIBLE TYPE (‘TYPE CONFUSION’) CWE-843
A type confusion vulnerability exists on pcwin.dll that could cause remote code to be executed when parsing a GD1 file.
CVE-2018-7813 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
3.2.2 ACCESS OF RESOURCE USING INCOMPATIBLE TYPE (‘TYPE CONFUSION’) CWE-843
A type confusion vulnerability exists on c3core.dll that could cause remote code to be executed when parsing a GD1 file.
CVE-2018-7815 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
3.2.3 STACK-BASED BUFFER OVERFLOW CWE-121
A stack-based buffer overflow vulnerability exists that could cause remote code to be executed when parsing a GD1 file.
CVE-2018-7814 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
mdm and rgod of 9SG Security Team, working with Trend Micro’s Zero Day Initiative, reported these vulnerabilities to NCCIC.
Schneider Electric recommends upgrading to GUIcon Version 2.0 Software Package (Gold Build 683.003), which includes fixes for these vulnerabilities is available for download below:
<https://www.eurotherm.com/products/temperature-controllers/config-software/guicon>
For more information refer to Schneider Electric’s security notification:
<https://www.schneider-electric.com/ww/en/download/document/SEVD-2018-338-01>
Schneider Electric also recommends the following cybersecurity best practices such as:
For further information related to cybersecurity in Schneider Electric’s products, visit the company’s cybersecurity web page:
<http://www2.schneider-electric.com/sites/corporate/en/support/cybersecurity/cybersecurity.page>
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-12-146-01B–Targeted 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:
No known public exploits specifically target these vulnerabilities. These vulnerabilities are not exploitable remotely.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7813
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7814
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7815
www2.schneider-electric.com/sites/corporate/en/support/cybersecurity/cybersecurity.page
cwe.mitre.org/data/definitions/121.html
cwe.mitre.org/data/definitions/843.html
cwe.mitre.org/data/definitions/843.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=Schneider%20Electric%20GUIcon%20Eurotherm+https://www.cisa.gov/news-events/ics-advisories/icsa-18-347-01
www.dhs.gov
www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
www.eurotherm.com/products/temperature-controllers/config-software/guicon
www.facebook.com/CISA
www.facebook.com/sharer/sharer.php?u=https://www.cisa.gov/news-events/ics-advisories/icsa-18-347-01&title=Schneider%20Electric%20GUIcon%20Eurotherm
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/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-18-347-01
www.oig.dhs.gov/
www.schneider-electric.com/ww/en/download/document/SEVD-2018-338-01
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-18-347-01
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=Schneider%20Electric%20GUIcon%20Eurotherm&body=www.cisa.gov/news-events/ics-advisories/icsa-18-347-01
6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.5 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
44.1%