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
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
88.7%
**ATTENTION:**Remotely exploitable/low skill level to exploit.
Vendor: Delta Electronics
Equipment: WPLSoft
**Vulnerabilities:**Stack-based Buffer Overflow, Heap-based Buffer Overflow, Out-of-bounds Write.
The following versions of WPLSoft, a PLC programming software, are affected:
Successful exploitation of these vulnerabilities could allow remote code execution or cause the software the attacker is accessing to crash.
Delta Electronics recommends affected users update their software to the latest version of WPLSoft V2.46.0 that is available at the following location:
Additionally, Delta recommends users restrict the applicationβs interaction with trusted files.
NCCIC recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. 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 in the NCCIC Technical Information Paper, ICS-TIP-12-146-01BβTargeted Cyber Intrusion Detection and Mitigation Strategies, that is available for download from the ICS-CERT website.
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.
No known public exploits specifically target these vulnerabilities.
The application utilizes a fixed length stack buffer where a value larger than the buffer can be read from a file into the buffer, causing the buffer to be overwritten, which may allow remote code execution or cause the application to crash.
CVE-2018-7494 has been assigned to this vulnerability. A CVSS v3 base score of 8.3 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H).
The application utilizes a fixed length heap buffer where a value larger than the buffer can be read from a file into the buffer, causing the buffer to be overwritten, which may allow remote code execution or cause the application to crash.
CVE-2018-7507 has been assigned to this vulnerability. A CVSS v3 base score of 8.3 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H).
The application writes data from a file outside the bounds of the intended buffer space, which could cause memory corruption or may allow remote code execution.
CVE-2018-7509 has been assigned to this vulnerability. A CVSS v3 base score of 8.3 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H).
Axt working with Trend Microβs Zero Day Initiative reported these vulnerabilities to NCCIC.
Critical Infrastructure Sectors: Commercial Facilities, Critical Manufacturing, Energy
Countries/Areas Deployed: Asia, Europe, United States
Company Headquarters Location: Taiwan
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7494
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7507
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7509
www.deltaww.com/Products/PluginWebUserControl/downloadCenterCounter.aspx?DID=5043&DocPath=1&hl=en-US
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-advisories/icsa-18-058-02
cwe.mitre.org/data/definitions/121.html
cwe.mitre.org/data/definitions/122.html
cwe.mitre.org/data/definitions/787.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=Delta%20Electronics%20WPLSoft+https://www.cisa.gov/news-events/ics-advisories/icsa-18-058-02
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-18-058-02&title=Delta%20Electronics%20WPLSoft
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/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-18-058-02
www.oig.dhs.gov/
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=Delta%20Electronics%20WPLSoft&body=www.cisa.gov/news-events/ics-advisories/icsa-18-058-02
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
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
88.7%