May 25, 2024


Google has greater than 20 years of expertise defending its core service from Distributed Denial of Service (DDoS) assaults and from probably the most superior internet utility assaults. With Cloud Armor, now we have enabled our clients to profit from our in depth expertise of defending our globally distributed merchandise reminiscent of Google Search, Gmail, and YouTube.

In our analysis, now we have seen that new and extra refined strategies are more and more in a position to bypass and override many of the business anti-DDoS techniques and Internet Utility Firewalls (WAF). Credential stuffing is one in all these strategies.

Credential stuffing is likely one of the hardest to detect assaults as a result of it’s extra just like the tortoise and fewer just like the hare. In a sluggish however regular method, the attacker exploits an inventory of usernames and passwords, typically first accessible illicitly after a knowledge breach, and makes use of automated strategies to drive these compromised credentials to offer them unauthorized entry to an internet service. 

Whereas password reuse habits and the ever-growing variety of stolen credential collections are making it simpler for organizations uncover and report the sort of “brute drive” approach to legislation enforcement and expertise suppliers, as we speak’s credential stuffing assaults typically leverage bots or compromised IoT units to achieve a stage of scale and automation that earns the attackers much better outcomes than the kind of brute-force assaults deployed even just a few years in the past.

Nonetheless, a defense-in-depth strategy to cloud safety might help stuff even superior credential stuffing assaults. One approach is to safe person accounts with multi-factor authentication. In case of breach, the additional layer of safety that MFA creates can defend a password publicity from leading to a profitable malicious login. Sadly, we all know that imposing such a requirement isn’t all the time acceptable or attainable. In case of MFA failure or implementation challenges, further controls to guard the web sites that expose login types towards credential stuffing assaults could be deployed.

We define beneath how Google Cloud might help scale back the probability of a profitable credential stuffing assault by constructing a layered safety technique that leverages native Google applied sciences reminiscent of Google Cloud Armor and reCAPTCHA Enterprise.

Google Cloud Armor overview

Google Cloud Armor might help clients who use Google Cloud or on-premises deployments to mitigate and tackle a number of threats, together with DDoS assaults and utility assaults like cross-site scripting (XSS) and SQL injection (SQLi).

Google Cloud Armor’s DDoS safety is always-on inline, scaling to the capability of Google’s world community. It is ready to immediately detect and mitigate community assaults with a view to enable solely well-formed requests by way of the load balancing proxies. 

This product supplies not solely anti-DDoS capabilities, however permits with a set of preconfigured guidelines to guard internet purposes and providers from widespread assaults from the web and assist mitigate the OWASP Prime 10 vulnerabilities. 

One of the crucial fascinating options of Cloud Armor, particularly for the credential stuffing assault safety, is the chance to use rate-based guidelines to assist clients to guard the purposes from a big quantity of requests that flood cases and block entry for authentic customers.

Google Cloud Armor has two kinds of rate-based guidelines:

  • Throttle: You’ll be able to implement a most request restrict per consumer or throughout all shoppers by throttling particular person shoppers to a user-configured threshold. This rule enforces the brink to restrict site visitors from every consumer that satisfies the match circumstances within the rule. The edge is configured as a specified variety of requests in a specified time interval.

  • Price-based ban: You’ll be able to fee restrict requests that match a rule on a per-client foundation after which briefly ban these shoppers for a specified time in the event that they exceed a user-configured threshold.

Google Cloud Armor safety insurance policies allow you to permit or deny entry to your exterior HTTP(S) load balancer on the Google Cloud edge, as shut as attainable to the supply of incoming site visitors. This prevents unwelcome site visitors from consuming assets or getting into your Digital Personal Cloud (VPC) networks. 

The next diagram illustrates the placement of the exterior HTTP(S) load balancers, the Google community, and Google knowledge facilities.


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