A Netskope foi nomeada Líder no Quadrante Mágico do Gartner™ de 2022 para Security Service Edge. Obtenha o Relatório

  • Produtos

    Os produtos Netskope são construídos na Netskope Security Cloud.

  • Plataforma

    Visibilidade incomparável e proteção de dados e contra ameaças em tempo real na maior nuvem privada de segurança do mundo.

Netskope é nomeada Líder no Relatório do Quadrante Mágico™ do Gartner de 2022 para SSE

Obtenha o Relatório Vá para a plataforma
Netskope gartner mq 2022 sse leader

A Netskope oferece uma pilha de segurança na nuvem moderna, com capacidade unificada para proteção de dados e ameaças, além de acesso privado seguro.

Explore a nossa plataforma
Birds eye view metropolitan city

Mude para serviços de segurança na nuvem líderes de mercado com latência mínima e alta confiabilidade.

Saiba mais
Lighted highway through mountainside switchbacks

Previna ameaças que muitas vezes contornam outras soluções de segurança usando uma estrutura SSE de passagem única.

Saiba mais
Lighting storm over metropolitan area

Soluções de zero trust para a implementação de SSE e SASE

Saiba mais
Boat driving through open sea

A Netskope permite uma jornada segura, inteligente e rápida para a adoção de serviços em nuvem, aplicações e infraestrutura de nuvem pública.

Saiba mais
Wind turbines along cliffside
  • Customer Success

    Proteja a sua jornada de transformação digital e aproveite ao máximo as suas aplicações na nuvem, na web e privadas.

  • Atendimento ao cliente

    Suporte proativo e o compromisso em otimizar seu ambiente da Netskope e acelerar seu sucesso.

  • Treinamento e certificação

    Os treinamentos da Netskope vão ajudar você a ser um especialista em segurança na nuvem.

Confie na Netskope para ajudar você a enfrentar ameaças emergentes, novos riscos, mudanças tecnológicas, mudanças organizacionais e de rede, e novos requisitos regulatórios.

Saiba mais
Woman smiling with glasses looking out window

Contamos com engenheiros qualificados no mundo todo, com experiências variadas em segurança na nuvem, redes, virtualização, entrega de conteúdo e desenvolvimento de software, prontos para prestar assistência técnica oportuna e de alta qualidade.

Saiba mais Portal de Suporte
Bearded man wearing headset working on computer

Proteja sua jornada de transformação digital e aproveite ao máximo seus aplicativos de nuvem, web e privados com o treinamento da Netskope.

Saiba mais
Group of young professionals working
  • Recursos

    Saiba mais sobre como a Netskope pode ajudá-lo a proteger sua jornada para a nuvem.

  • Blog

    Saiba como a Netskope viabiliza a segurança e a transformação de redes através do security service edge (SSE).

  • Eventos e workshops

    Esteja atualizado sobre as últimas tendências de segurança e conecte-se com seus pares.

  • Security Defined

    Tudo o que você precisa saber em nossa enciclopédia de segurança cibernética.

Podcast Security Visionaries

Episode 11: Empowering People for a Secure Future

Reproduzir o podcast
Black man sitting in conference meeting

Leia as últimas novidades sobre como a Netskope pode viabilizar a jornada Zero Trust e SASE por meio dos recursos do security service edge (SSE).

Leia o Blog
Sunrise and cloudy sky

SASE Week

Netskope is positioned to help you begin your journey and discover where Security, Networking, and Zero Trust fit in the SASE world.

Saiba mais
SASE Week

O que é o Security Service Edge?

Explore o lado de segurança de SASE, o futuro da rede e proteção na nuvem.

Saiba mais
Four-way roundabout
  • Empresa

    Ajudamos você a antecipar os desafios da nuvem, dos dados e da segurança da rede.

  • Por que Netskope

    A transformação da nuvem e o trabalho em qualquer lugar mudaram a forma como a segurança precisa funcionar.

  • Liderança

    Nossa equipe de liderança está fortemente comprometida em fazer tudo o que for preciso para tornar nossos clientes bem-sucedidos.

  • Parceiros

    Fazemos parceria com líderes de segurança para ajudá-lo a proteger sua jornada para a nuvem.

A Netskope possibilita o futuro do trabalho.

Saiba mais
Curvy road through wooded area

A Netskope está redefinindo a nuvem, os dados e a segurança da rede para ajudar as organizações a aplicar os princípios de Zero Trust para proteger os dados.

Saiba mais
Switchback road atop a cliffside

Pensadores, construtores, sonhadores, inovadores. Juntos, fornecemos soluções de segurança na nuvem de última geração para ajudar nossos clientes a proteger seus dados e seu pessoal.

Meet our team
Group of hikers scaling a snowy mountain

A estratégia de comercialização da Netskope, focada em Parcerias, permite que nossos Parceiros maximizem seu crescimento e lucratividade enquanto transformam a segurança corporativa.

Saiba mais
Group of diverse young professionals smiling
Blog Threat Labs Leaky Groups: Accidental Exposure in Google Groups
Mar 06 2020

Leaky Groups: Accidental Exposure in Google Groups

Netskope Threat Labs recently posted the first entry in our leaky cloud app series about Google Calendar. In this edition, we will cover Google Groups. Misconfigurations in Google Groups can lead to unintended internal, external, and public exposure. Our research uncovered the exposure of confidential, internal, and sensitive data across hundreds of organizations through Google Groups. We also found a public group used as an email list for password resets, allowing anyone to view the user passwords.

This post details the common misconfigurations in Google Groups that lead to unintended data  exposure and provides recommendations to lock down groups to prevent data leaks.

Google Groups

Google Groups provides discussion groups via a message board where people can hold conversations in the form of posted messages. A group can be configured to function as an email list, web forum, Q&A forum, or collaborative inbox.

Google Groups – Misconfiguration

When a user creates a group, the first step is to configure access control. The basic group permissions for a personal Google account are shown in Figure 1.

Figure 1:  Personal Google group settings

The default group settings for a personal account are

  • Group visibility → open to anyone on the web
  • View topics →  Select groups of users
  • Post → Select groups of users
  • Join the Group → Anyone can ask

The default “Group visibility” and “Join the group” permissions allow anyone on the web to see that the group exists and ask to join. The default “View topics” and “Post” permissions prevent anyone outside the group from viewing content or posting messages. The default settings do not expose any sensitive data. Instead, the exposures we discovered were the result of user misconfiguration, not overly permissive defaults. Figure 2 shows the worst kind of exposure we discovered: Anyone on the web can join, view, or post.  

Figure 2: Group permissions set to Anyone on the web

Netskope Threat Labs discovered hundreds of groups with “Anyone on the web” settings that exposed confidential, internal, and sensitive data to the public Internet. In one example, we found a group of a popular online portal that was used as an email list for password generation/reset, where anyone on the web was allowed to view the topics as shown in Figure 3.

Figure 3: Group setting that allowed any on the web to view the post

The above setting allowed anyone to view the passwords, though they could not join the group. In another similar example, we found a facility management consultancy that allowed anyone to view the topics, exposing confidential information, including salary information and offer letters.

Data doesn’t necessarily have to be exposed to the public Internet to be considered “exposure.” Corporate groups with misconfigured permissions can also lead to internal or external exposure of confidential data. We identified one such misconfiguration of a group used for finance-related discussions with the settings described by Figure 4. This allowed everyone in the organization to view data that should have been kept confidential within the members of the group.

Figure 4: Group setting in an organisation’s group 

To summarise, we identified several patterns in the settings that led to data exposure:

  • Groups that allowed anyone on the web to join (without approval)
  • Groups that allowed anyone on the web to view the topics
  • Groups that allowed anyone on the web to post
  • Groups that allowed anyone within the organization to view the topics

We discovered many different types of sensitive data exposures, including: 

  • Employee resumes
  • Offer letters
  • Salary details
  • Employee background verification documents
  • Travel itineraries
  • Travel documents
  • Bank statements
  • Financial transactions
  • Support tickets
  • Passwords
  • Company revenue details
  • Source code
  • License keys
  • Meeting links
  • Drivers licenses
  • Passports

The groups that exposed the data were:

  • Private, public, and government organizations
  • HR, finance, and marketing departments
  • Travel agencies
  • Online portals
  • Educational institutions
  • Third-party consultancies

We reached out to the affected organizations to mitigate the exposures we discovered. In the course of these discussions we uncovered the following themes:

  • Organizations were not actively auditing group settings
  • Organizations did not have controls in place to prevent individuals from exposing groups
  • Users weren’t being properly removed from groups when they left the organizations, namely because their personal emails had been added

Google Groups – Recommended Settings

For personal Google accounts, we recommend groups use the permissions shown in Figure 5.  These are slightly more restrictive than the default permissions to prevent others from discovering the group or asking to join.

Figure 5: Recommended Google personal email group settings

For enterprise accounts, we recommend the permissions as shown in Figure 6. Enterprise accounts also enable administrators to enable group service restrictions. We recommend the following restrictions be put in place to prevent accidental exposure.

Figure 6: Recommended Google enterprise email group settings

Conclusion

This second edition of our leaky cloud apps series provided a detailed synopsis of how confidential information gets leaked through misconfigured Google Groups. In many of the cases we highlighted, adversaries could leverage the leaked information to gain access to additional data and infrastructure. They could also use the group to potentially spread malicious content if given join or post permissions. We recommend auditing group settings and restricting groups to our recommended settings to avoid accidental exposure. For more information about Google Groups, we recommend reading an article by Krebs on Security about public data exposure and Google post describing how to audit your own settings. 

Stay tuned for our next edition, which will cover Google link sharing.

author image
About the author
Ashwin Vamshi is a Security Researcher with innate interest in targeted attacks and malwares using cloud services. He is primarily focusing in identifying new attack vectors and malwares, campaigns and threat actors using ‘cloud as an attack vector.’
Ashwin Vamshi is a Security Researcher with innate interest in targeted attacks and malwares using cloud services. He is primarily focusing in identifying new attack vectors and malwares, campaigns and threat actors using ‘cloud as an attack vector.’