Add fuzzing audit blog post

content/en/blog/2024/fuzzing-audit-results.md

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+---
+title: OpenTelemetry Collector Completes Fuzzing Audit
+linkTitle: Fuzzing Audit Results
+date: 2024-12-19
+author: '[Adam Korczynski](https://github.com/AdamKorcz)'
+issue: 5798
+sig: GC
+---
+
+OpenTelemetry is happy to announce the completion of the Collector's fuzzing audit sponsored by [the CNCF](https://www.cncf.io/) and carried out by [Ada Logics](https://adalogics.com/). The audit marks a significant step in the OpenTelemetry project, ensuring the security and reliability of the Collector for its users. 
+
+## What is fuzzing?
+
+Fuzzing is a testing technique that executes an API with a high amount of pseudo-random inputs and observes the API's behavior. The technique has increased in popularity due to its empirical success in finding security vulnerabilities and reliability issues. Fuzzing initially developed with a focus on testing software implemented in memory-unsafe languages, where it has been most productive. However, in recent years, fuzzing has expanded to memory-safe languages as well. 
+
+Over several years, the CNCF has invested in fuzzing for its ecosystem. This testing has found numerous security vulnerabilities in widely used projects such as Helm (CVE-2022-36055, CVE-2022-23524, CVE-2022-23526, CVE-2022-23525), the Notary project (CVE-2023-25656), containerd (CVE-2023-25153), Crossplane (CVE-2023-28494, CVE-2023-27483) and Flux (CVE-2022-36049). 
+
+## OSS-Fuzz
+
+To initiate the audit, Ada Logics auditors integrated the OpenTelemetry Collector into [OSS-Fuzz](https://github.com/google/oss-fuzz). OSS-Fuzz is a service offered by Google to critical open source projects, free of charge. The service runs a project's fuzzers with excess resources multiple times per week. If OSS-Fuzz finds a crash, it notifies the project. It then checks if the project has fixed the crash upstream and if so, marks the issue(s) as fixed. The whole workflow happens continuously on Google's fuzzing infrastructure, supported by thousands of CPU cores. These testing resources outperform what developers or malicious threat actors can muster. 
+
+## The tests
+
+After the Ada Logics team integrated OpenTelemetry into OSS-Fuzz, the next step was to write a series of fuzz tests for the OpenTelemetry Collector. The auditors wrote 49 fuzz tests for core components of the Collector, as well as several receivers and processors in the `opentelemetry-collector-contrib` repository. 
+
+The fuzz tests were left to run while the audit team observed their health in production. At the completion of the fuzzing audit, the 49 fuzz tests on the OSS-Fuzz platform were healthy. 
+
+To ensure continued reliability, the fuzz testing continues on the Collector even though the audit is complete. 
+
+## The results so far
+
+Fuzz testing for the Collector is ongoing, allowing for changes to the project to be tested as well. As of the date of this post, no crashes have been detected.
+
+But the work is not done! The Ada Logics team created the Collector's fuzzing setup as a reference implementation that other OpenTelemetry subprojects can rely on to create their own fuzz testing, ensuring greater stability for the project as a whole.
+
+For more insight into the audit process, see the [published summary](https://github.com/open-telemetry/community/blob/main/reports/ADA_Logics-collector-fuzzing-audit-2024.pdf).
+