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Wallarm has rolled out the update to detect and mitigate CVE-2021-44228. No additional actions are required from the customers Attempts at exploitation will be automatically blocked in a blocking mode When working in a monitoring mode, consider creating a virtual patch Log4Shell A 0-day exploit in the Java core library log4j was discovered that results in Remote Code Execution (RCE) by simple 1-line exploit with JNDI URL. Given how ubiquitous this library is, the impact…

We all know how it’s convenient to use tools like Sentry or Datadogs for JavaScript events monitoring. It allows to catch errors in real-time, organize and manage issues resolution process, and genuinely shift left operations to developers. But Wallarm security experts warn of dangerous patterns to use such tools integrated into UI since it can cause private data-stealing from authenticated users in an almost invisible way. This article will explain how it could happen and…

HTTP/2 become the standard defacto for the modern web and causes new application security risks. The HTTP2 request smuggling is one of a few HTTP/2 vulnerabilities with the high severity that raised last year. In this post, we will describe it in detail and suggest an open-source tool http2smugl that detects such kinds of vulnerabilities. HTTP/2 is the thing that already took an Internet. According to the Wikipedia: “The standardization effort was supported by Chrome,…

On July 14th, Emil Lerner found and explored new ways of HTTP desync/smuggling exploitation based on HTTP/2 request processing issues. He submitted the bug to the Cloudflare security team through their bug bounty program. This security issue took Cloudflare a week to fix and was completed on July the 24th. Emil was awarded with a $1’000 bounty, and on August 15th, the company accepted this bug for public disclosure. Here we go. The nature…