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SANS NewsBites is a semiweekly high-level executive summary of the most important news articles that have been published on computer security during the last week. Each news item is very briefly summarized and includes a reference on the web for detailed information, if possible.

Spend five minutes per week to keep up with the high-level perspective of all the latest security news. New issues are delivered free every Tuesday and Friday.

Volume XXII - Issue #18

March 3, 2020

Apache Tomcat Servers - Act Now; WordPress Plugins Actively Exploited; FBI Talks Ransomware at RSA




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SANS NewsBites                March 3, 2020                Vol. 22, Num. 018

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TOP OF THE NEWS  


  GhostCat Vulnerability Affects Apache Tomcat Servers (Important to Act Now)

  WordPress Plugin Flaws Are Being Actively Exploited

  RSA: FBI Special Agent Talks Ransomware

 

REST OF THE WEEK'S NEWS


  Redcar and Cleveland Council Still Recovering from Ransomware

  RailWorks Ransomware Attack

  Hackers Target Visser Precision with Ransomware and Steal Data

  Walgreens App Bug Exposed Users Personal Messages

  Network Rail/C3UK Data Leak

  Munson Healthcare Group Data Security Incident

  Pro Publica Examines Security of Election-Related Websites


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TOP OF THE NEWS   

 

--GhostCat Vulnerability Affects Apache Tomcat Servers (Important to Act Now)

(March 2, 2020)

A vulnerability in the Tomcat AJP protocol can be exploited to read file contents and access source code and configuration files. If the servers allow file uploads, the flaw can also be exploited to remotely execute code. Dubbed GhostCat because is has existed in Tomcat for more than a decade, the vulnerability affects Tomcat versions 6.x, 7.x, 8.x, and 9.x. Apache Tomcat has released versions 9.0.31, 8.5.51, and 7.0.100 to address the issue.


[Editor Comments]


[Ullrich] This vulnerability got a bit "lost" between RSA and Coronavirus. It should have received much more attention as exploitation is under way. Multiple proof of concept exploits are available.


[Neely] The exploit requires the AJP connector to be enabled and its port, often 8009, accessible. Apply updates to Tomcat where explicitly installed. Where Tomcat is bundled with applications, you'll need to wait for the supplier to provide an update. Mitigations include disabling AJP if you're not using the service, or restrict access to port 8009. If you are using it, enable the requiredSecret attribute to require authenticated connections.


Read more in:

Chaitin: Ghostcat is a high-risk file read / include vulnerability in Tomcat

https://www.chaitin.cn/en/ghostcat

Cyware: Patch Your Tomcat and JBoss Instances to Mitigate New High-Risk GhostCat Vulnerability

https://cyware.com/news/patch-your-tomcat-and-jboss-instances-to-mitigate-new-high-risk-ghostcat-vulnerability-a5a490c2

 
 

--WordPress Plugin Flaws Are Being Actively Exploited

(February 28 & March 2, 2020)

Hackers have been exploiting vulnerabilities in several WordPress plugins. Updates are available to address flaws in the Duplicator, Profile Builder, ThemeGrill Demo Importer, Flexible Checkout Fields for WooCommerce, Async JavaScript, 10Web Map Builder for Google Maps, and Modern Events Calendar Lite plugins. Attackers have also been exploiting a vulnerability in ThemeREX Addons; there is currently no update available to address this flaw, and users are urged to remove the plugin from their sites.


[Editor Comments]


[Ullrich] If you absolutely need to run WordPress: Let Wordpress.com run it for you. It appears to be the WordPress business model to make the software impossible to run securely on your own unless you spend a lot of effort or run a very limited, stripped-down version.


[Neely] Don't just disable unused plugins, remove them so the vulnerable code is deleted from your server. Check your site for new admin accounts, and unexpected content, particularly .php and .zip files in /wp-content/uploads/. Also, make sure you have regular backups of both your site and its database so you can roll back if needed.

 

[Murray] Application managers and developers are responsible for the quality of all included code, without regard to its source. "Plugins" rarely come with any representation or measure of quality.  


Read more in:

ZDNet: Hackers are actively exploiting zero-days in several WordPress plugins

https://www.zdnet.com/article/hackers-are-actively-exploiting-zero-days-in-several-wordpress-plugins/

Bleeping Computer: Critical Bugs in WordPress Plugins Let Hackers Take Over Sites

https://www.bleepingcomputer.com/news/security/critical-bugs-in-wordpress-plugins-let-hackers-take-over-sites/

 
 

--RSA: FBI Special Agent Talks Ransomware

(March 2, 2020)

At the RSA Conference in San Francisco last week, Joel DeCapua, FBI special agent in the Global Operations and Targeting Unit, told an audience that victims of ransomware have paid more than $140 million over the past six-and-a-half years. That figure accounts only for ransom demands paid in bitcoin. DeCapua also said that the initial vector of intrusion for about three-quarters of ransomware attacks is Remote Desktop Protocol (RDP).


[Editor Comments]


[Neely] Only expose the RDP service to the Internet by exception on systems sufficiently configured for the service, including strong authentication, active monitoring and patching. Better still, require a VPN prior to allowing RDP access.

 

[Murray]  Other speakers suggest the main source of ransomware is phishing. Strong authentication schemes are better than any kind of passwords in resisting either RDP or phishing.


Read more in:

ZDNet: Ransomware victims are paying out millions a month. One particular version has cost them the most.

https://www.zdnet.com/article/fbi-ransomware-victims-have-paid-out-140-million-one-version-has-cost-them-the-most/


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REST OF THE WEEK'S NEWS

 

--Redcar and Cleveland Council Still Recovering from Ransomware

(February 27, 2020)

A ransomware attack hit servers in the UK council of Redcar and Cleveland more than three weeks ago; residents are still unable to access online services. One councilor said they were told recovery would take several months and cost between #11 million and #18 million (US $14 million and $23 million).


[Editor Comments]


[Neely] Time to recover includes impacts of deciding to rebuild or repair impacted systems, as well as experience with recovery from DR media. When planning for ransomware, don't forget to include active exercises rebuilding systems to assure those procesess work in a timely fashion.

 

[Honan] We need to accept that there is no guarantee our preventive controls will detect and prevent a ransomware attack. Having an effective BCP can minimise the impact of many ransomware attacks. This story reinforces that stance and the old adage "Fail to prepare, prepare to fail."


Read more in:

Computer Weekly: Redcar & Cleveland Council confirms ransomware attack

https://www.computerweekly.com/news/252479241/Redcar-Cleveland-Council-confirms-ransomware-attack

The Guardian: Ransomware attack leaves council facing huge bill to restore services

https://www.theguardian.com/technology/2020/feb/27/redcar-and-cleveland-council-hit-by-cyber-attack

BBC: Redcar council IT hack confirmed as ransomware attack

https://www.bbc.com/news/uk-england-tees-51651405

 
 

--RailWorks Ransomware Attack

(February 28, 29, & March 1, 2020)

RailWorks Corp., a railroad track and transit system provider, suffered a ransomware attack in late January 2020. The breach may have compromised personally identifiable information of current and former employees as well as their beneficiaries and dependents; the company has begun notifying affected individuals.  


Read more in:

TechNadu: RailWorks Corporation Disclosed Catastrophic Ransomware Infection

https://www.technadu.com/railworks-corporation-disclosed-catastrophic-ransomware-infection/94045/

Bleeping Computer: US Railroad Contractor Reports Data Breach After Ransomware Attack

https://www.bleepingcomputer.com/news/security/us-railroad-contractor-reports-data-breach-after-ransomware-attack/

Silicon Angle: Railroad firm Railworks hit by ransomware and employee data stolen

https://siliconangle.com/2020/03/01/railroad-firm-railworks-hit-ransomware-employee-data-stolen/

Document Cloud: Re: Notice of a Data Breach (PDF)

https://www.documentcloud.org/documents/6789873-RailWorks-Employee-US-Individual-Notification.html

 
 

--Hackers Target Visser Precision with Ransomware and Steal Data

(March 1 & 2, 2020)

A "cybersecurity incident" at Visser Precision, a maker of custom parts for companies in the automotive, aerospace, and other industries, is believed to be a ransomware attack. The attackers also stole data belonging to its business partners, and have reportedly already posted some of the stolen documents.   


Read more in:

SC Magazine: Data-stealing ransomware hits parts maker for Tesla, Boeing and Lockheed Martin

https://www.scmagazine.com/home/security-news/cybercrime/data-stealing-ransomware-hits-parts-maker-for-tesla-boeing-and-lockheed-martin/

Tech Crunch: Visser, a parts manufacturer for Tesla and SpaceX, confirms data breach

https://techcrunch.com/2020/03/01/visser-breach/

 
 

--Walgreens App Bug Exposed Users Personal Messages

(March 1 & 2, 2020)

A privacy issue in the Walgreens mobile app (Android and iOS)  secure messaging feature exposed users' information to other users. The bug allowed some user to view others' personal messages, which included some health-related information, for several days last month. Walgreens became aware of the issue on January 15, 2020. It has since been fixed. Walgreens operates more than 9,000 drugstores across the US.     


Read more in:

ZDNet: Walgreens says mobile app leaked users' personal data

https://www.zdnet.com/article/walgreens-says-mobile-app-leaked-users-personal-data/

Bleeping Computer: US Drugstore Giant Walgreens Leaked Users' Sensitive Info

https://www.bleepingcomputer.com/news/security/us-drugstore-giant-walgreens-leaked-users-sensitive-info/

 
 

--Network Rail/C3UK Data Leak

(March 2, 2020)

A database maintained by Internet service provider C3UK was found to be unprotected, exposing information belonging to roughly 10,000 people who used the company's wi-fi service at railway stations. C3UK is a contractor for Network Rail, which owns and manages the infrastructure of most of the railway network in Great Britain.


[Editor Comments]


[Neely] While this was a backup, not the full production database, it still included email addresses, gender, mobile device OS information, as well as travel reason, which was intended to be used for targeted advertising. Think twice about the amount of information requested to use free services.


Read more in:

BBC: Rail station wi-fi provider exposed traveller data

https://www.bbc.com/news/technology-51682280

TechNadu: 'Network Rail' in the UK Leaked the Data of 10000 Travelers

https://www.technadu.com/network-rail-uk-leaked-data-of-10000-travelers/94160/

 
 

--Munson Healthcare Group Data Security Incident

(February 26, 27, & 28, 2020)

Hackers gained access to email accounts of at least two employees at Munson Healthcare Group in Michigan between July 31 and October 22, 2019. The breach was not detected until January 16, 2020. The compromised accounts had access to patient data, including names, financial account information, Social Security numbers, and insurance, diagnostic, and treatment information. Munson Healthcare operates nine hospitals in Northern Michigan.  


[Editor Comments]


[Murray] It is this kind of continued fraudulent reuse of compromised credentials that strong authentication is designed to resist.


Read more in:

Munson Healthcare: Munson Healthcare Notifies Patients of Data Security Incident

https://www.munsonhealthcare.org/about-the-system/news-media-relations/news/news-details?&news=1030

Infosecurity Magazine: Michigan Healthcare Group Hack Went Undetected for Six Months

https://www.infosecurity-magazine.com/news/munson-healthcare-data-breach/

SC Magazine: Munson Healthcare data breach exposes PHI

https://www.scmagazine.com/home/security-news/data-breach/munson-healthcare-data-breach-exposes-phi/

 
 

--Pro Publica Examines Security of Election-Related Websites

(March 2, 2020)

Pro Publica found that at least 50 election-related websites in the US have serious security issues. Some of the sites are running on software that dates back to 2003, some have inadequate encryption, and some contain unnecessary software. The election-related sites provide information for voters about where to vote, how to register to vote, and they provide election results. None of the sites Pro Publica examined had reported cyberattacks.


[Editor Comments]


[Murray] "Unnecessary software," including operating system code, is a significant source of vulnerability. Such software often increases the attack surface of systems and applications by more than ten times. This code is often included without any thought being given to its provenance or quality.


Read more in:

Pro Publica: Some Election-Related Websites Still Run on Vulnerable Software Older Than Many High Schoolers

https://www.propublica.org/article/some-election-related-websites-still-run-on-vulnerable-software-older-than-many-high-schoolers

 

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INTERNET STORM CENTER TECH CORNER

 

Show me Your Clipboard Data!

https://isc.sans.edu/forums/diary/Show+me+Your+Clipboard+Data/25846/


Hazelcast IMDG Discover Scan

https://isc.sans.edu/forums/diary/Hazelcast+IMDG+Discover+Scan/25850/


Microsoft Exchange Server Vulnerability Scans

https://twitter.com/GossiTheDog/status/1232369036438233088


Tomcat GhostCat Vulnerability

https://lists.apache.org/thread.html/r7c6f492fbd39af34a68681dbbba0468490ff1a97a1bd79c6a53610ef%40%3Cannounce.tomcat.apache.org%3E


SSL Distribution by Country

https://isc.sans.edu/forums/diary/Secure+vs+cleartext+protocols+couple+of+interesting+stats/25854/


Checkpoint Evasion Encyclopedia

https://research.checkpoint.com/2020/cpr-evasion-encyclopedia-the-check-point-evasion-repository/


OWASP Threat Dragon

https://github.com/mike-goodwin/owasp-threat-dragon-desktop


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The Editorial Board of SANS NewsBites

 

John Pescatore was Vice President at Gartner Inc. for fourteen years. He became a director of the SANS Institute in 2013. He has worked in computer and network security since 1978 including time at the NSA and the U.S. Secret Service.


Shawn Henry is president of CrowdStrike Services. He retired as FBI Executive Assistant Director responsible for all criminal and cyber programs and investigations worldwide, as well as international operations and the FBI's critical incident response.


Suzanne Vautrinot was Commander of the 24th Air Force (AF Cyber) and now sits on the board of directors of Wells Fargo and several other major organizations.


Ed Skoudis is co-founder of CounterHack, the nation's top producer of cyber ranges, simulations, and competitive challenges, now used from high schools to the Air Force. He is also author and lead instructor of the SANS Hacker Exploits and Incident Handling course, and Penetration Testing course.


Mark Weatherford is Global Information Security Strategist for Booking Holdings and the former Deputy Under Secretary of Cybersecurity at the US Department of Homeland Security.


Stephen Northcutt teaches advanced courses in cyber security management; he founded the GIAC certification and was the founding President of STI, the premier skills-based cyber security graduate school, www.sans.edu.


Dr. Johannes Ullrich is Chief Technology Officer of the Internet Storm Center and Dean of the Faculty of the graduate school at the SANS Technology Institute.


William Hugh Murray is an executive consultant and trainer in Information Assurance and Associate Professor at the Naval Postgraduate School.


Lee Neely is a Senior Cyber Analyst at Lawrence Livermore National Laboratory, SANS Analyst and Mentor. He has worked in computer security since 1989.


Rob Lee is the SANS Institute's top forensics instructor and director of the digital forensics and incident response research and education program at SANS (computer-forensics.sans.org).


Tom Liston is member of the Cyber Network Defense team at UAE-based Dark Matter. He is a Handler for the SANS Institute's Internet Storm Center and co-author of the book Counter Hack Reloaded.


Jake Williams is a SANS course author and the founder of Rendition Infosec, with experience securing DoD, healthcare, and ICS environments.


Dr. Eric Cole is an instructor, author and fellow with The SANS Institute. He has written five books, including Insider Threat and he is a founder with Secure Anchor Consulting.


David Hoelzer is the director of research & principal examiner for Enclave Forensics and a senior fellow with the SANS Technology Institute.


Gal Shpantzer is a trusted advisor to CSOs of large corporations, technology startups, Ivy League universities and non-profits specializing in critical infrastructure protection. Gal created the Security Outliers project in 2009, focusing on the role of culture in risk management outcomes and contributes to the Infosec Burnout project.


Alan Paller is director of research at the SANS Institute.


Brian Honan is an independent security consultant based in Dublin, Ireland.


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