February 10, 2023 CISA KEV Breakdown | TerraMaster, Fortra, Intel

February 10 – 3 New Vulns | CVE-2015-2291, CVE-2022-24990, CVE-2023-0669

In this CISA KEV Breakdown, an Intel Driver vulnerability almost a decade old finds a seat in the KEV next to two RCEs in TerraMaster OS and GoAnywhere MFT. At time of writing, all vulnerabilities have received relevant patches and organizations are encouraged to ensure the latest versions affecting these applications are in place.

Notable Vulnerability Additions

CVE-2023-0669 | GoAnywhere MFT Remote Code Execution

A vulnerability exists in GoAnywhere MFT before version 7.1.2 which contains a vulnerable endpoint that can allow for an attacker to achieve unauthenticated remote code execution. The vulnerability was disclosed as a zero-day by the vendor, and later posted on Mastadon by Brian Krebs. The service suffered a temporary outage as the vulnerability was investigated and the workaround was put in place. It is important to note that the vulnerability appears to only affect the administrative interface of the application, and not the web client expected to live openly in the internet.

Public exploit code for the vulnerability does exist, as well as a metasploit module. It is recommended that organizations apply the February 8 patch posted by the vendor. If a patch is unavailable, it is encouraged that users comment or remove the servlet function exposing the vulnerable endpoint. Adding the ‘<!–‘ and ‘–>’ to comment out the servlet function in the web.xml file should suffice to remediate the RCE capabilities.

<!--

           <servlet> 

                      <servlet-name>License Response Servlet</servlet-name>   
                      <servlet-class>com.linoma.ga.ui.admin.servlet.LicenseResponseServlet</servlet-class>   
                      <load-on-startup>0</load-on-startup>   
           </servlet> 

           <servlet-mapping>   
                      <servlet-name>License Response Servlet</servlet-name>   
                      <url-pattern>/lic/accept</url-pattern>   
           </servlet-mapping>   

-->

Security Advisory:

https://my.goanywhere.com/webclient/DownloadProductFiles.xhtml (requires a free account to view)

CVE-2015-2291 | Intel Ethernet Diagnostics Driver Denial of Service, BYOVD

A vulnerability exists in the Intel Ethernet Diagnostics Driver for Windows machines which can allow for an attacker to cause a denial of service due to kernel memory corruption. The vulnerability also abuses the more recent concern, BYOVD (Bring Your Own Video Driver), which exists in Windows that allows attackers to abuse Windows kernel functionality by leveraging legitimate drivers to spawn malware. This technique has grown in popularity among threat actors due to the circumvention in EDR technology that it provides. A blog post by Crowdstrike explains how they were able to identify this vulnerability being used for BYOVD capabilities, and how this affects EDR applications. Public exploit code for the vulnerability exists. It is recommended organizations ensure proper compensating controls are in place when risk arises surrounding BYOVD.

Security Advisory:

https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00051.html

CVE-2022-24990 | TerraMaster OS Remote Code Execution

A vulnerability exists in TerraMaster NAS 4.2.29 and earlier which can allow for a remote attacker to obtain administrator credentials through a crafted request using “User-Agent: TNAS” to the “module/api.php?mobile/webNasIPS” endpoint. Researchers at Octagon Networks were able to chain together CVE-2022-24990 along with CVE-2022-24989 to allow for unauthenticated remote code execution as root in TerraMaster NAS 4.2.29. This should also be addressed in version 4.2.31. Public exploit code for the vulnerability exists. The second vulnerability mentioned has yet to be added to the KEV as of time of writing, but may in some time if an incident reveals evidence of the activity highlighted in Octagon’s research. GreyNoise has been observing traffic related to TerraMaster CVE-2022-24990 and has a tag which will continue to track activity.

Security Advisory:

https://forum.terra-master.com/en/viewtopic.php?t=3030

Be sure to check out Nucleus Security’s KEV Enrichment Dashboard where we overlay vulnerabilities that are added to the catalog with intelligence from GreyNoise, exploit-prediction scoring from EPSS and lastly CVSS. You can use the data yourself and use further metrics to influence decision-making when determining risk of vulnerabilities added to the KEV.

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