Talos Threat Source is a regular intelligence update from Cisco Talos, highlighting the biggest threats each week and other security news.
CloudFlare Reverse Proxies Found To Be Leaking Uninitialized Memory, Exposing Sensitive Information
Description: Cisco's Talos Group specializes in early-warning intelligence and threat analysis necessary for maintaining a secure network. People responsible for defending networks realize that the security threat landscape is constantly in flux as attackers continuously evolve their techniques. Talos advances the overall efficacy of all Cisco security platforms by aggregating data, cooperating with teams of security experts, and applying the cutting-edge big data technology to security. In this talk/webinar, we will perform deep analysis of recent threats Talos has observed over the past quarter and see how Talos leverages large datasets to deliver product improvements and mitigation strategies.
Description: Ransomware has become a constant threat to users. Innovation is the key to staying ahead of threat defenders and earning the most money. During this talk I will examine how three separate ransomware variants (TeslaCrypt, Cryptowall, & Locky) have demonstrated totally different innovation paths with varying results. TeslaCrypt demonstrates a failed attempt at innovation that could not overcome the constant examination by threat defenders. Cryptowall evolved from a simple phishing attack into an advanced piece of malware delivered by exploit kits earning millions of dollars annually. Finally Locky has evolved into a significant spam based email threat driven by an affiliate model that has enabled the ransomware authors to separate themselves from the actual malware distribution.
Description: CloudFlare reverse proxies were recently discovered to be leaking uninitialized memory, potentially exposing sensitive information such as user passwords, authentication tokens, and other data. These leaks, first identified by Tavis Ormandy of Google Project Zero, have been traced to memory over-read bug in a server-side HTML parser on CloudFlare's reverse proxies. CloudFlare has responded by disabling and patching the vulnerable functionality. Google and other search engines have also responded by purging cached copies of web pages that were affected by this flaw.
Description: Google's Project Zero team has disclosed a pair of vulnerabilities that were identified in Windows and IE/Edge. One of these vulnerabilities is a memory disclosure flaw in the Window GDI library. The other flaw is a bit more severe as it's a type-confusion vulnerability affecting Edge and Internet Explorer. These two vulnerabilities were disclosed as they exceeded the 90-day disclosure deadline policy set forth by Project Zero. Patches for these vulnerabilities are not yet available, but are expected in the next Patch Tuesday.
Description: A double-free vulnerability in the Linux kernel has been identified by Andrey Konovalov, an independent researcher. This vulnerability, which has been assigned CVE-2017-6074, manifests in the DCCP functionality of the kernel and could be exploited to achieve code execution in the context of the kernel as an unprivileged process. The Linux kernel has been patched to address this vulnerability. Fixes for this flaw are expected to be incorporated into Linux distributions.
Google Announces First SHA1 Collision
Web Cache Deception Attack
Fingerprinting Firefox users with cached intermediate CA certificates (#fiprinca)
Korean MalDoc Drops Evil New Years Presents
Detection Name: W32.D2D786E373-100.SBX.TG
SHA 256: e8f80d0b97ecb8ccb06741e99e04eb5c843c0d76c6ba40047b917033f0510386
Detection Name: W32.Trojan.NM
SHA 256: d3dbe14033ad25a5e4ffe1e2b559e53ee1d1799eb54eedbd7a689d6a88fd7137
Detection Name: OSX.MAC:Malwaregen.19hh.1201
SHA 256: aa44a8dd4563c03ac65650622cb3af81f52e8ea2e1df663f68e0061b8bcac3ce
Detection Name: W32.Auto:aa44a8.in03.Talos
SHA 256: f4ae1a3d610a57547f014215a5d7aaed8572cd36aa77a9567c183f11430a6b55