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
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:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
34.6%
This updated advisory is a follow-up to the original advisory titled ICSA-21-182-03 Delta Electronics DOPSoft (Update A) that was published July 27, 2022, on the ICS webpage on cisa.gov/ICS.
Successful exploitation of these vulnerabilities could allow arbitrary code execution and disclose information.
The following versions of DOPSoft, a software supporting the DOP-100 series HMI screens, are affected:
4.2.1 OUT-OF-BOUNDS READ CWE-125
The affected product is vulnerable to an out-of-bounds read while processing project files, which may allow an attacker to disclose information.
CVE-2021-27455 has been assigned to this vulnerability. A CVSS v3 base score of 3.3 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N).
The affected product is vulnerable to an out-of-bounds read, which may allow an attacker to execute arbitrary code.
CVE-2021-27412 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been assigned; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
Natnael Samson (@NattiSamson), working with Trend Microβs Zero Day Initiative, reported these vulnerabilities to CISA.
--------- Begin Update B Part 1 of 1 ---------
Delta Electronics recommends updating to DOPSoft v4.00.16 or later.
--------- End Update B Part 1 of 1 ---------
Delta Electronics will release an updated version of DOPSoft on August 31, 2021, and recommends users install this update on all affected systems.
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. CISA also recommends users take the following measures to protect themselves from social engineering attacks:
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-12-146-01BβTargeted 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. These vulnerabilities are not exploitable remotely.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-27412
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-27455
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-advisories/icsa-21-182-03
cwe.mitre.org/data/definitions/125.html
cwe.mitre.org/data/definitions/125.html
downloadcenter.deltaww.com/en-US/DownloadCenter?v=1&CID=06&itemID=060302&dataType=8&sort_expr=cdate&sort_dir=DESC
downloadcenter.deltaww.com/en-US/DownloadCenter?v=1&CID=06&itemID=060302&dataType=8&sort_expr=cdate&sort_dir=DESC
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
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us-cert.cisa.gov/ics
us-cert.cisa.gov/ics/recommended-practices
us-cert.cisa.gov/ics/tips/ICS-TIP-12-146-01B
us-cert.cisa.gov/ncas/tips/ST04-014
us-cert.cisa.gov/sites/default/files/publications/emailscams_0905.pdf
us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
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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
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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
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:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
34.6%