In a digital, interconnected world, the continuous availability and accessibility of technology systems are crucial to business operations. Document management platforms are no exception, as they play a vital role in centralising and organising documents, making access and collaboration easier in a secure environment. However, this reliance on technology leaves these systems exposed to a variety of cyber threats, including Distributed Denial of Service attacks, better known as DDoS attacks.
A DDoS attack aims to make a service unavailable by overwhelming it with massive, simultaneous network traffic from multiple sources. This can paralyse an organisation’s operations, leading to lost productivity, financial damage and even reputational harm. In this article, we take an in-depth look at DDoS attacks, focusing on how they affect document management platforms, the methods attackers use and the mitigation strategies organisations can adopt to protect their systems.
Understanding DDoS attacks
DDoS attacks are designed to disrupt the normal operation of a server, service or network by flooding the target or its surrounding infrastructure with a massive stream of internet traffic. This degrades performance or makes the service completely unavailable. There are several types of DDoS attacks, each exploiting different components of the target network or system:
Volumetric attacks
These attacks try to consume all the bandwidth available between the target and the internet.
UDP Flood: Sends a large number of User Datagram Protocol (UDP) packets to random ports on the target, causing congestion.
ICMP Flood: Sends a large number of Internet Control Message Protocol (ICMP) packets, usually “ping” packets, to overwhelm the network.
Protocol attacks
These attacks exploit the way network protocols work in order to exhaust processing resources.
SYN Flood: Sends a large number of SYN packets to initiate a TCP connection but never completes the handshake, exhausting the connection tables.
Ping of Death: Sends malformed ICMP packets that cause system crashes. It is an old technique, now mitigated on most up-to-date systems.
Application layer attacks
These attacks target specific resources of a web application.
HTTP Flood: Sends multiple HTTP requests to a web server, imitating legitimate traffic but in volumes the server cannot process.
Slowloris: Keeps HTTP connections open for long periods by sending incomplete HTTP headers, exhausting the server’s connections.
Impact of DDoS attacks on document management platforms
Document management platforms are particularly vulnerable to DDoS attacks because they depend on continuous availability to access and manage critical documents. The impact of a DDoS attack on a document management platform can be devastating:
Service unavailability: The most immediate effect of a DDoS attack is to make the platform inaccessible to users, disrupting essential business operations.
Lost productivity: When employees cannot access important documents, productivity drops and operational efficiency suffers.
Reputational damage: Unavailable services can lead to a loss of trust among customers and partners, damaging the company’s reputation.
Financial impact: In addition to the direct costs of mitigating the attack, lost business and reduced productivity can result in substantial financial losses.
Exposure to other attacks: While the organisation is busy dealing with a DDoS attack, attackers may try to exploit other vulnerabilities in the network.
Methods used in DDoS attacks on document management platforms
Attackers use various techniques to launch DDoS attacks against document management platforms. The most common are the following:
Botnets
Attackers often rely on botnets, that is, networks of devices infected with malware and controlled remotely. These devices, which may include personal computers, servers and IoT equipment, are instructed to send traffic to the target simultaneously.
Amplification and reflection
Amplification and reflection attacks involve sending small requests to intermediate servers, which then respond to the target with large volumes of traffic. One example is DNS amplification, where small DNS queries result in large responses sent to the target.
DDoS for hire services
On the black market, DDoS for hire services allow anyone to commission a DDoS attack against a specific target for a fee. As a result, these services make DDoS attacks accessible even to individuals without advanced technical skills.
DDoS attack mitigation strategies
Protecting a document management platform against DDoS attacks requires a multi-layered, proactive approach. The following mitigation strategies stand out:
Monitoring and detection
Implementing continuous monitoring and anomaly detection systems can help identify a DDoS attack in its early stages. Traffic analysis tools detect unusual patterns and alert the security team.
Redundancy and load balancing
Setting up redundant servers and using load balancing techniques can help spread network traffic, reducing the impact of a DDoS attack. Content delivery networks (CDN) also help absorb and mitigate malicious traffic.
Rate limiting
Rate limiting policies restrict the amount of traffic a user or IP address can generate within a given period. In this way, they prevent a single user from consuming excessive resources.
Firewalls and intrusion prevention systems (IPS)
Configuring firewalls and intrusion prevention systems (IPS) makes it possible to block malicious traffic before it reaches the document management platform’s servers. Specific rules can also be applied to identify and mitigate known DDoS attacks.
DDoS mitigation services
Specialist security companies provide DDoS mitigation services that detect and mitigate attacks in real time. These services use distributed infrastructure to absorb and disperse malicious traffic.
Incident response planning
Developing and regularly testing an incident response plan is crucial to ensure the organisation is ready to respond quickly to a DDoS attack. This plan should include procedures for internal and external communication, as well as specific actions to mitigate the attack.
Regulatory framework
Beyond the technical dimension, system availability is also a compliance issue. For example, Directive (EU) 2022/2555, known as NIS 2, extends cybersecurity obligations to many essential and important entities. In particular, it requires risk management, business continuity and the reporting of significant incidents to the competent authorities. In Portugal, the National Cybersecurity Centre (CNCS) is the reference authority on this matter.
Therefore, even when the document management platform is provided by a third party, the organisation should know the provider’s anti-DDoS measures and include them in its risk analysis.
Practical example: An attack during an audit
Consider a company that, on the day of a client audit, cannot access its document management platform. The provider quickly identifies an HTTP Flood attack targeting its portal.
Fortunately, the platform is protected by a cloud mitigation service. Within a few minutes, therefore, the malicious traffic is filtered and the service is restored. In addition, the company had a fallback plan: The critical audit documents were available in a report exported the day before. As a result, the audit goes ahead with minimal delay and no impact on the client relationship.
DDoS protection checklist
- Active DDoS mitigation service, in-house or from the provider.
- Content delivery network and web application firewall (WAF).
- Rate limiting on APIs and public forms.
- Traffic monitoring with automatic alerts.
- Redundant infrastructure across more than one zone.
- Tested response plan, with emergency contacts.
- Fallback procedure for accessing critical documents.
Finally, it is worth reviewing this list whenever the platform changes provider, hosting or architecture, because each change can create new points of exposure.
Common mistakes to avoid
A frequent mistake is to think that only large companies are targeted by DDoS. In fact, attack for hire services have made these attacks cheap and accessible. Another mistake is relying solely on the local firewall, which cannot absorb volumetric attacks. Lastly, many organisations never test their response plan and only discover its flaws during a real attack.
Frequently asked questions
Does a DDoS attack steal data?
Usually not. The aim is to make the service unavailable. However, it can serve as a distraction for other attacks, so monitoring should remain active.
How long does a DDoS attack last?
It depends on the attacker: It can last minutes or several days. With a suitable mitigation service, however, the impact on users is usually very limited.
Conclusion
DDoS attacks pose a significant threat to document management platforms and can cause severe disruption, financial losses and reputational damage. The distributed nature and sophistication of these attacks make protection an ongoing challenge. However, by combining proactive monitoring, advanced mitigation technologies and incident response planning, organisations can strengthen their defences against DDoS attacks and ensure the continuity of critical services.
Investing in robust security measures and keeping up to date with the latest attack trends and techniques is fundamental to protecting document management platforms. By adopting a comprehensive, integrated approach to cybersecurity, companies can not only mitigate the risks of DDoS attacks but also maintain their customers’ and partners’ confidence in their ability to protect valuable information and keep services continuously available.
Read also: The drama of cyber attacks and Ransomware and backups: How to make sure recovery is really possible.
For national cybersecurity alerts and recommendations, see the Portuguese National Cybersecurity Centre (CNCS).