4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
6.1 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.4 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
41.2%
Successful exploitation of this vulnerability could allow an attacker to execute commands on behalf of the affected user.
The following versions of MACH ProWebCom/Sys, a web enabled building controller, are affected:
An authenticated user clicking on a malicious link may allow an attacker to execute commands on behalf of the affected user.
CVE-2019-18249 has been assigned to this vulnerability. A CVSS v3 base score of 8.2 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:L).
Gjoko Krstic of Applied Risk reported this vulnerability to CISA.
Reliable Controls has released MACH-ProWebCom/Sys firmware revision 8.26.4 and software revision 2.15 to resolve the vulnerability. The updated software can be obtained at the following link: MACH-ProWebCom/Sys firmware revision 8.26.4 (login required).
CISA recommends users take the following measures to protect themselves from social engineering attacks:
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.
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.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.gov in the Technical Information Paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.
No known public exploits specifically target this vulnerability. High skill level is needed to exploit.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-18249
cwe.mitre.org/data/definitions/79.html
gcc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.reliablecontrols.com%2Fsupport%2Ffirmware%2Freleases.php&data=02%7C01%7Cscott.southwick%40inl.gov%7Ce0f4a319100d45b7b87e08d77d966c72%7C4cf464b7869a42368da2a98566485554%7C0%7C1%7C637115957340128800&sdata=xFoSdyboZ7PLFFqBW3MaI78DKXD8242m60pNhdNOVII%3D&reserved=0
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=Reliable%20Controls%20MACH-ProWebCom/Sys+https://www.cisa.gov/news-events/ics-advisories/icsa-19-353-04
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-19-353-04&title=Reliable%20Controls%20MACH-ProWebCom/Sys
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:L
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-19-353-04
www.oig.dhs.gov/
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-19-353-04
www.us-cert.gov/ics
www.us-cert.gov/ics
www.us-cert.gov/ics/recommended-practices
www.us-cert.gov/ics/tips/ICS-TIP-12-146-01B
www.us-cert.gov/ncas/tips/ST04-014
www.us-cert.gov/sites/default/files/publications/emailscams_0905.pdf
www.us-cert.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=Reliable%20Controls%20MACH-ProWebCom/Sys&body=www.cisa.gov/news-events/ics-advisories/icsa-19-353-04
4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
6.1 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.4 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
41.2%