7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
9.8 High
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
9.7 High
AI Score
Confidence
High
0.007 Low
EPSS
Percentile
81.0%
Successful exploitation of these vulnerabilities could allow an attacker to gain code execution, read/delete files, and create arbitrary files.
The following versions of IGSS software are affected:
The affected product is vulnerable to remote code execution, due to missing length check on user supplied data, when a constructed message is received on the network.
CVE-2021-22802 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
By sending constructed messages on the network, an attacker could write arbitrary files to folders in context of the DC module that could lead to remote code execution.
CVE-2021-22803 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
An issue exists that could allow disclosure and read access of arbitrary files in the context of the user running IGSS, due to missing validation of user supplied data in network messages.
CVE-2021-22804 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:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
An issue exists that could allow disclosure and read access of arbitrary files in the context of the user running IGSS, due to missing validation of user supplied data in network messages.
CVE-2021-22805 has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N).
Vyacheslav Moskvin, working with Trend Micro’s Zero Day Initiative, reported these vulnerabilities to CISA.
Schneider Electric recommends users update to Version 15.0.0.21244 of the IGSS DC module. Please note, dc.exe includes fixes for these vulnerabilities and is available for download through IGSS Master > Update IGSS Software or at the IGSS update link.
Users should employ appropriate patching methodologies. Schneider Electric strongly recommends the use of backups as well as an evaluation of the impact of these patches in a test and development environment or an offline infrastructure. Contact Schneider Electric’s Customer Care Center if you need assistance removing a patch.
If users choose not to apply the remediation provided above, they should immediately apply the following mitigations to reduce the risk of exploit:
For more information see Schneider Electric’s security notification: SEVD-2021-285-03
CISA recommends users take defensive measures to minimize the risk of exploitation of 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 on us-cert.cisa.gov. 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 webpage on us-cert.cisa.gov 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 CISA for tracking and correlation against other incidents.
No known public exploits specifically target these vulnerabilities.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-22802
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-22803
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-22804
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-22805
cwe.mitre.org/data/definitions/120.html
cwe.mitre.org/data/definitions/22.html
cwe.mitre.org/data/definitions/306.html
cwe.mitre.org/data/definitions/434.html
download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-285-03
igss.schneider-electric.com/igss/igssupdates/v150/IGSSUPDATE.ZIP
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=Schneider%20Electric%20IGSS+https://www.cisa.gov/news-events/ics-advisories/icsa-21-285-03
us-cert.cisa.gov/ics
us-cert.cisa.gov/ics
us-cert.cisa.gov/ics/alerts/ICS-ALERT-10-301-01
us-cert.cisa.gov/ics/recommended-practices
us-cert.cisa.gov/ics/tips/ICS-TIP-12-146-01B
us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
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-21-285-03&title=Schneider%20Electric%20IGSS
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
www.instagram.com/cisagov
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www.linkedin.com/sharing/share-offsite/?url=https://www.cisa.gov/news-events/ics-advisories/icsa-21-285-03
www.oig.dhs.gov/
www.se.com/us/en/work/support/contacts.jsp
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-21-285-03
www.usa.gov/
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mailto:?subject=Schneider%20Electric%20IGSS&body=www.cisa.gov/news-events/ics-advisories/icsa-21-285-03
7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
9.8 High
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
9.7 High
AI Score
Confidence
High
0.007 Low
EPSS
Percentile
81.0%