Tag: Protocol Abuse
By looking at the table of supported IP protocols, we see that the bot creates raw packets of IGMP, ICMP and TCP protocols. Those packets are just being marked with those protocol numbers, however other fields and headers are not actually set. The packet is filled with “A” characters according to the size specified by…
Read MoreAnother week, another threat. This week dawned with a spate of twitchy fingers telling us about the latest monster to emerge from the closets: KRACK. KRACK stands for Key Reinstallation Attack. You can read the details of this one on a variety of sites including Arstechnica,1 Verge,2 and, as befitting the seriousness of this one, its own website.3…
Read MoreWe also analyzed the primary root causes of the breaches, how that varied in breach remediation costs by industry, and the impact of these breaches on each data type breached on the global scale. The purpose of our analysis was to identify where organizations are most likely to be attacked in a way that…
Read MoreEighty-six percent of Internet hosts prefer forward secrecy; all modern browsers do, too. The Bleichenbacher attack only affects RSA sessions not protected with the ephemeral keys offered by forward secrecy. All modern browsers and mobile clients have preferred ephemeral keys for several years. Google has been preferring them with their servers and software since 2012.6…
Read MoreExecutive Summary Like coral reefs teeming with a variety of life, web applications are “colony creatures.” They consist of a multitude of independent components, running in separate environments with different operational requirements and supporting infrastructure (both in the cloud and on premises) glued together across networks. In this report, we examine that series of interacting…
Read MoreIn July 2018, F5 released its first annual Application Protection Report based on the results of an F5-commissioned Ponemon survey of 3,135 IT and security practitioners across the globe. Additional research conducted by Whatcom Community College, University of Washington Tacoma, along with data from White Hat Security and Loryka served to make this one of…
Read MoreThe following table summarizes the vulnerability impact for each of the tested HTTP/2 implementations: Tested Webserver Test result Mitigation applied following disclosure Apache httpd Stops responding to new requests. The connection never timed out. Patched and allocated CVE-2018-11763 NGINX Consumes 100% of the server CPU resources and makes NGINX respond slower to incoming connections. The…
Read MoreF5 researchers uncovered a cryptominer campaign delivering new Golang malware that targets Linux-based servers. Golang malware is not often seen in the threat landscape; it was first seen to mid-2018 and has continued throughout 2019. The malware campaign propagates using 7 different methods: 4 web application exploits (2 targeting ThinkPHP, 1 targeting Drupal, and 1…
Read MoreIn-App Testing Since the HSTS and HPKP protocols allow for genuine interception of SSL by trusted certificates, nothing can be done to warn end users that their communications are being intercepted. For those that need to inform their users of interception, in-app testing could be considered. By performing an additional SSL/TLS handshake, using Javascript within…
Read MoreWelcome to the Summary of the 2019 F5 Labs TLS Telemetry Report. This year, we expanded the scope of our research to bring you deeper insights into how encryption on the web is constantly evolving. We look into which ciphers and SSL/TLS versions are being used to secure the Internet’s top websites and, for the…
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