Equipo de investigación de seguridad de Fastly

Vulnerabilities are an unfortunate inevitability. However, when using a WAF there are options for your security teams while waiting for a patch.

We have discovered two instances of insecure deserialization in Cacti versions prior to 1.2.25, tracked as CVE-2023-30534.

In this post, we'll explore the application vulnerability directory traversal. What is it and how can you protect your apps from it?

Announcing the Network Effect Threat Report, Fastly’s threat intelligence report with insights based on unique data from April to June of 2023

What you need to know about CVE-2023-34362: Progress MOVEit Transfer SQL Injection Vulnerability

NagiosXI versions 5.5.6 to 5.7.5 are vulnerable to three different instances of command injection.

On January 20th, Chrome shipped an update that changed the profile of one of the most popular TLS client fingerprinting algorithms, JA3. In this short blog post we’ll describe the change and our observations across Fastly's network.

Learn how User-Agent Client Hints work, explore privacy-related features and concerns, and how the partial adoption and incompleteness of this emerging standard can be used to detect behavior disparities.

If your application is on the internet, chances are it has been subjected to nefarious automation. These events can include many different attacks – including content scraping, credential stuffing, application DDoS, web form abuse, token guessing, and more.

TLS fingerprinting has become a prevalent tool to help security defenders identify what clients are talking to their server infrastructure.

Threat hunting is the practice of looking for active attackers who have possibly penetrated security boundaries within an organization. WAF data can be a valuable resource in threat hunting for network callbacks. Here’s how.

In this post, we review details for two RCE vulnerabilities impacting Spring Cloud and Spring Framework, including how Fastly customers can protect themselves from this vulnerability.

Open URL redirection is a class of web app security problems that make it easier for attackers to direct users to malicious resources. Here are some examples of how they do it and what you can do to prevent it.

There are many benefits to adopting GraphQL, but its security implications are less understood. In this post, we’ll explore those implications and offer guidance on which defaults and controls can support a safer GraphQL implementation.

Our new WAF efficacy framework provides a standardized way to measure the effectiveness of a WAF’s detection capabilities through continuous verification and validation. Here’s how it works.

We’re sharing our latest data and new insights into the Log4j/Log4Shell vulnerability (CVE-2021-44228 + CVE-2021-45046) in this post in order to help the engineering community cope with the situation. We also share our guidance around testing your environment against many of the new obfuscation methods that have been seen.

CVE-2021-44228 is a Remote Code Execution vulnerability in the Apache Log4j library being actively exploited. We provide our observations into the exploit and a summary of its impact.

On November 11th 2021, Fastly Engineering received alerts related to segmentation faults on Compute@Edge. A Fastly investigation into CVE-2021-43790, a bug in Lucet, a dependency of Compute@Edge, is disclosed in a recent Bytecode Alliance security advisory. Fastly investigations have not identified additional impact outside of the single case disclosed in this advisory. It's our goal in this Fastly Security Advisory to illustrate our knowledge about the bug discovered and the actions we have taken to prevent further possible impact to our customers.

Compute, our serverless compute environment, can be used to solve headaches dealing with attackers looking to modify and manipulate resources. In this post, we tell you how.

Our Security Research Team provides guidance on how to address CVE-2021-40438, a vulnerability in Apache HTTP Server version 2.4.48 and earlier, by patching impacted version(s) and enabling a new templated rule to prevent exploitation.