Blue Coat Proxysg Device on the Consumer ISP Canar Telecom
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
RSA-512 Certificates Abused in the Wild
RSA-512 Certificates abused in the wild During recent weeks we have observed several interesting publications which have a direct relation to an investigation we worked on recently. On one hand there was a Certificate Authority being revoked by Mozilla, Microsoft and Google (Chrome), on the other hand there was the disclosure of a malware attack by Mikko Hypponen (FSecure) using a government issued certificate signed by the same Certificate Authority. That case however is not self-contained and a whole range of malicious software had been signed with valid certificates. The malicious software involved was used in targeted attacks focused on governments, political organizations and the defense industry. The big question is of course, what happened, and how did the attackers obtain access to these certificates? We will explain here in detail how the attackers have used known techniques to bypass the Microsoft Windows code signing security model. Recently Mikko Hypponen wrote a blog on the F-Secure weblog (http://www.f-secure.com/weblog/archives/00002269.html) detailing the discovery of a certificate used to sign in the wild malware. Specifically this malware was embedded in a PDF exploit and shipped in August 2011. Initially Mikko also believed the certificate was stolen, as that is very common in these days, with a large amount of malware families having support, or optional support, for stealing certificates from the infected system. Apparently someone Mikko spoke to mentioned something along the lines that it had been stolen a long time ago. During the GovCert.nl symposium Mikko mentioned the certificate again, but now he mentioned that according to the people involved with investigating the case in Malaysia it likely wasn't stolen. -
Encrypted Traffic Management for Dummies®, Blue Coat Systems Special Edition Published by John Wiley & Sons, Inc
These materials are © 2015 John Wiley & Sons, Inc. Any dissemination, distribution, or unauthorized use is strictly prohibited. Encrypted Traffic Management Blue Coat Systems Special Edition by Steve Piper, CISSP These materials are © 2015 John Wiley & Sons, Inc. Any dissemination, distribution, or unauthorized use is strictly prohibited. Encrypted Traffic Management For Dummies®, Blue Coat Systems Special Edition Published by John Wiley & Sons, Inc. 111 River St. Hoboken, NJ 07030‐5774 www.wiley.com Copyright © 2015 by John Wiley & Sons, Inc., Hoboken, New Jersey No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, scanning or otherwise, except as permitted under Sections 107 or 108 of the 1976 United States Copyright Act, without the prior written permission of the Publisher. Requests to the Publisher for permission should be addressed to the Permissions Department, John Wiley & Sons, Inc., 111 River Street, Hoboken, NJ 07030, (201) 748‐6011, fax (201) 748‐6008, or online at http://www.wiley.com/go/permissions. Trademarks: Wiley, For Dummies, the Dummies Man logo, The Dummies Way, Dummies.com, Making Everything Easier, and related trade dress are trademarks or registered trademarks of John Wiley & Sons, Inc. and/or its affiliates in the United States and other countries, and may not be used without written permission. Blue Coat Systems and the Blue Coat logo are trademarks or registered trade- marks of Blue Coat Systems, Inc. All other trademarks are the property of their respective owners. John Wiley & Sons, Inc., is not associated with any product or vendor mentioned in this book. -
WHITE PAPER Encrypted Traffic Management January 2016
FRAUNHOFER INSTITUTE FOR COMMUNICATION, INFORMATION PROCESSIN G AND ERGONOMICS FKI E WHITE PAPER ENCRYPTED TRAFFIC MANAGEMENT WHITE PAPER Encrypted Traffic Management January 2016 Raphael Ernst Martin Lambertz Fraunhofer Institute for Communication, Information Processing and Ergonomics FKIE in Wachtberg and Bonn. Project number: 108146 Project partner: Blue Coat Systems Inc. Fraunhofer FKIE White paper Encrypted Traffic Management 3 | 33 Contents 1 Introduction .......................................................................................... 5 2 The spread of SSL ................................................................................. 6 3 Safety issues in previous versions of SSL ............................................... 8 4 Malware and SSL ................................................................................... 9 5 Encrypted Traffic Management .............................................................. 11 5.1 Privacy ...................................................................................................................... 12 5.1.1 Requirements ............................................................................................................ 12 5.2 Compatibility ............................................................................................................ 12 5.2.1 Requirements ............................................................................................................ 12 5.3 Performance ............................................................................................................ -
TLS Attacks & DNS Security
IAIK TLS Attacks & DNS Security Information Security 2019 Johannes Feichtner [email protected] IAIK Outline TCP / IP Model ● Browser Issues Application SSLStrip Transport MITM Attack revisited Network Link layer ● PKI Attacks (Ethernet, WLAN, LTE…) Weaknesses HTTP TLS / SSL FLAME FTP DNS Telnet SSH ● Implementation Attacks ... ● Protocol Attacks ● DNS Security IAIK Review: TLS Services All applications running TLS are provided with three essential services Authentication HTTPS FTPS Verify identity of client and server SMTPS ... Data Integrity Detect message tampering and forgery, TLS e.g. malicious Man-in-the-middle TCP IP Encryption Ensure privacy of exchanged communication Note: Technically, not all services are required to be used Can raise risk for security issues! IAIK Review: TLS Handshake RFC 5246 = Establish parameters for cryptographically secure data channel Full handshake Client Server scenario! Optional: ClientHello 1 Only with ServerHello Client TLS! Certificate 2 ServerKeyExchange Certificate CertificateRequest ClientKeyExchange ServerHelloDone CertificateVerify 3 ChangeCipherSpec Finished ChangeCipherSpec 4 Finished Application Data Application Data IAIK Review: Certificates Source: http://goo.gl/4qYsPz ● Certificate Authority (CA) = Third party, trusted by both the subject (owner) of the certificate and the party (site) relying upon the certificate ● Browsers ship with set of > 130 trust stores (root CAs) IAIK Browser Issues Overview Focus: Relationship between TLS and HTTP Problem? ● Attacker wants to access encrypted data ● Browsers also have to deal with legacy websites Enforcing max. security level would „break“ connectivity to many sites Attack Vectors ● SSLStrip ● MITM Attack …and somehow related: Cookie Stealing due to absent „Secure“ flag… IAIK Review: ARP Poisoning How? Attacker a) Join WLAN, ● Sniff data start ARP Poisoning ● Manipulate data b) Create own AP ● Attack HTTPS connections E.g. -
Web and Mobile Security
Cyber Security Body of Knowledge: Web and Mobile Security Sergio Maffeis Imperial College London bristol.ac.uk © Crown Copyright, The National Cyber Security Centre 2021. This information is licensed under the Open Government Licence v3.0. To view this licence, visit http://www.nationalarchives.gov.uk/doc/open- government-licence/. When you use this information under the Open Government Licence, you should include the following attribution: CyBOK Web & Mobile Security Knowledge Area Issue 1.0 © Crown Copyright, The National Cyber Security Centre 2021, licensed under the Open Government Licence http://www.nationalarchives.gov.uk/doc/open- government-licence/. The CyBOK project would like to understand how the CyBOK is being used and its uptake. The project would like organisations using, or intending to use, CyBOK for the purposes of education, training, course development, professional development etc. to contact it at [email protected] to let the project know how they are using CyBOK. bristol.ac.uk Web & Mobile Security KA • This webinar covers and complements selected topics from the “Web & Mobile Security Knowledge Area - Issue 1.0” document [WMS-KA for short] • “The purpose of this Knowledge Area is to provide an overview of security mechanisms, attacks and defences in modern web and mobile ecosystems.” • We assume basic knowledge of the web and mobile platforms – The WMS-KA also covers some of the basic concepts assumed here Web and Mobile Security 3 Scope • The focus of WMS-KA is on the intersection of mobile and web security, as a result of recent appification and webification trends. – The KA does not cover specific mobile-only aspects including mobile networks, mobile malware, side channels. -
SSL/TLS Interception Proxies and Transitive Trust Jeff Jarmoc Dell Secureworks Counter Threat Unit℠ Threat Intelligence
SSL/TLS Interception Proxies and Transitive Trust Jeff Jarmoc Dell SecureWorks Counter Threat Unit℠ Threat Intelligence Presented at Black Hat Europe – March 14, 2012. Introduction Secure Sockets Layer (SSL) [1] and its successor Transport Layer Security (TLS) [2] have become key components of the modern Internet. The privacy, integrity, and authenticity [3] [4] provided by these protocols are critical to allowing sensitive communications to occur. Without these systems, e- commerce, online banking, and business-to-business exchange of information would likely be far less frequent. Threat actors have also recognized the benefits of transport security, and they are increasingly turning to SSL to hide their activities. Advanced Persistent Threat (APT) attackers [5], botnets [6], and even commodity web attacks can leverage SSL encryption to evade detection. To counter these tactics, organizations are increasingly deploying security controls that intercept end- to-end encrypted channels. Web proxies, data loss prevention (DLP) systems, specialized threat detection solutions, and network intrusion prevention systems (NIPS) offer functionality to intercept, inspect, and filter encrypted traffic. Similar functionality is present in lawful intercept systems and solutions enabling the broad surveillance of encrypted communications by governments. Broadly classified as “SSL/TLS interception proxies,” these solutions act as a “man in the middle,” violating the end-to-end security promises of SSL. This type of interception comes at a cost. Intercepting SSL-encrypted connections sacrifices a degree of privacy and integrity for the benefit of content inspection, often at the risk of authenticity and endpoint validation. Implementers and designers of SSL interception proxies should consider these risks and understand how their systems operate in unusual circumstances. -
Certificate Transparency: New Part of PKI Infrastructure
Certificate transparency: New part of PKI infrastructure A presentation by Dmitry Belyavsky, TCI ENOG 7 Moscow, May 26-27, 2014 About PKI *) *) PKI (public-key infrastructure) is a set of hardware, software, people, policies, and procedures needed to create, manage, distribute, use, store, and revoke digital certificates Check the server certificate The server certificate signed correctly by any of them? Many trusted CAs NO YES Everything seems to We warn the user be ok! DigiNotar case OCSP requests for the fake *.google.com certificate Source: FOX-IT, Interim Report, http://cryptome.org/0005/diginotar-insec.pdf PKI: extra trust Independent Trusted PKI source certificate DANE (RFC 6698) Certificate pinning Limited browsers support Mozilla Certificate Patrol, Chrome cache for Google certificates Certificate transparency (RFC 6962) Inspired by Google (Support in Chrome appeared) One of the authors - Ben Laurie (OpenSSL Founder) CA support – Comodo Certificate Transparency: how it works • Log accepts cert => SCT Client • Is SCT present and signed correctly? Client • Is SCT present and signed correctly? Auditor • Does log server behave correctly? Monitor • Any suspicious certs? Certificate Transparency: how it works Source: http://www.certificate-transparency.org Certificate Transparency how it works Source: http://www.certificate-transparency.org Certificate Transparency current state Google Chrome Support (33+) http://www.certificate-transparency.org/certificate-transparency-in-chrome Google Cert EV plan http://www.certificate-transparency.org/ev-ct-plan Certificate Transparency current state Open source code 2 pilot logs Certificate Transparency: protect from what? SAVE from MITM attack ü Warning from browser ü Site owner can watch logs for certs Do NOT SAVE from HEARTBLEED! Certificate transparency and Russian GOST crypto Russian GOST does not save from the MITM attack Algorithm SHA-256 >>> GOSTR34.11-2012 Key >>> GOST R 34.10-2012 Q&A Questions? Drop ‘em at: [email protected] . -
Recording Everything: Digital Storage As an Enabler of Authoritarian Governments
December 14, 2011 Wire Design - Collage of city pedestrians and surveillance cameras. Recording Everything: Digital Storage as an Enabler of Authoritarian Governments John Villasenor EXECUTIVE SUMMARY ithin the next few years an important threshold will be crossed: For the first time ever, it will become technologically and financially feasible for W authoritarian governments to record nearly everything that is said or done within their borders – every phone conversation, electronic message, social media interaction, the movements of nearly every person and vehicle, and video from every street corner. Governments with a history of using all of the tools at their disposal to track and monitor their citizens will undoubtedly make full use of this capability once it becomes available. The Arab Spring of 2011, which saw regimes toppled by protesters organized via Twitter and Facebook, was heralded in much of the world as signifying a new era in which information technology alters the balance of power in favor of the repressed. However, within the world’s many remaining authoritarian regimes it John Villasenor is a was undoubtedly viewed very differently. For those governments, the Arab Spring nonresident senior likely underscored the perils of failing to exercise sufficient control of digital fellow in Governance communications and highlighted the need to redouble their efforts to increase the Studies and in the Center for Technology monitoring of their citizenry. Innovation at Technology trends are making such monitoring easier to perform. While the Brookings. He is also domestic surveillance programs of countries including Syria, Iran, China, Burma, professor of electrical engineering at the and Libya under Gadhafi have been extensively reported, the evolving role of University of California, digital storage in facilitating truly pervasive surveillance is less widely recognized. -
Security Economics in the HTTPS Value Chain
Security Economics in the HTTPS Value Chain Hadi Asghari*, Michel J.G. van Eeten*, Axel M. Arnbak+ & Nico A.N.M. van Eijk+1 * [email protected], [email protected] Delft University of Technology, Faculty of Technology Policy and Management + [email protected], [email protected] University van Amsterdam, Faculty of Law, Institute for Information Law Abstract. Even though we increasingly rely on HTTPS to secure Internet communications, several landmark incidents in recent years have illustrated that its security is deeply flawed. We present an extensive multi-disciplinary analysis that examines how the systemic vulnerabilities of the HTTPS authentication model could be addressed. We conceptualize the security issues from the perspective of the HTTPS value chain. We then discuss the breaches at several Certificate Authorities (CAs). Next, we explore the security incentives of CAs via the empirical analysis of the market for SSL certificates, based on the SSL Observatory dataset. This uncovers a surprising pattern: there is no race to the bottom. Rather, we find a highly concentrated market with very large price differences among suppliers and limited price competition. We explain this pattern and explore what it tells us about the security incentives of CAs, including how market leaders seem to benefit from the status quo. In light of these findings, we look at regulatory and technical proposals to address the systemic vulnerabilities in the HTTPS value chain, in particular the EU eSignatures proposal that seeks to strictly regulate HTTPS communications. Keywords: HTTPS, Cybersecurity, Internet Governance, Constitutional Values, E-Commerce, Value Chain Analysis, Security Economics, eSignatures Regulation, SSL, TLS, Digital Certificates, Certificate Authorities. -
The State of SSL Security
THE STATE OF SSL SECURITY SSL OF STATE THE White Paper The State of SSL Security Why Secure Sockets Layer Certificates Remain Vital to Online Safety The State of SSL Security: Why Secure Sockets Layer Certificates Remain Vital to Online Safety The State of SSL Security Contents What SSL is—and why it matters . .3 . Different levels of validation, different levels of trust . .4 . SSL under siege. 5 Emerging SSL trends: protecting the fragile trust ecosystem. 6 Why working with a trusted, industry-leading vendor is critical . 8. Conclusion . 9 The State of SSL Security: Why Secure Sockets Layer Certificates Remain Vital to Online Safety Without adequate security, online transactions—and the Internet as we know it— could not serve as a feasible platform for global commerce, transmission of data, or the sharing of reliable information. SSL security is the easiest, most cost-effective way to provide that strong protection. Yet high-profile SSL hacking incidents have filled the news headlines recently. Poor security practices by secure sockets layer (SSL) Certificate Authorities (CAs), coupled with persistent outcries from industry detractors that the CA model is no longer viable, caused the digital certificate to have a challenging year in 2011. But SSL itself is not the problem. Rather, the culprits tend to be weak validation, lax oversight of third-party authenticating entities, failure to use best practices to secure facilities, or other factors that are less a matter of the technology than of operator error. SSL itself is still critical to keeping online transactions safe. The real issue is that businesses considering SSL should remember that their choice of vendor matters—significantly. -
Legacy of Heartbleed: MITM and Revoked Certificates
Legacy of Heartbleed: MITM and Revoked Certificates Alexey Busygin [email protected] NeoBIT Notable Private Key Leaks • 2010 – DigiCert Sdn Bhd. issued certificates with 512-bit keys • 2012 – Trustwave issued CA certificate for one of its customers DLP system • 2013 – DigiNotar CA was totally compromised • 2014 – Heartbleed bug caused certificate revocation storm. 500000+ certs to be revoked • 2015 – RSA-CRT private key leaks • 2017 – Cloudbleed bug in Cloudflare reverse proxies 2 Checking Certificate Revocation Status: Certificate Revocation Lists (CRL) • CAs publish CRLs – lists of revoked certificate serial numbers • Normally certificate contains URL of the corresponding CRL Why it’s not OK? CRLs are not appropriate for online checks: • Excess size (up to 1 MB) • Vulnerable to replay attacks 3 Checking Certificate Revocation Status: Online Certificate Status Protocol (OCSP) • CAs maintain OCSP responders answering with certificate revocation status • Normally certificate contains URL of the OCSP responder • OCSP provides optional replay attack protection Why it’s not OK? • Slows down connection establishment • Browsing history leaks to CA • OCSP responder is DDoS target 4 Checking Certificate Revocation Status: OCSP Stapling • No browsing history leaks • Choose one: o Replay attack protection o TLS server side OCSP response caching: Minimal impact on connection establishment time Reduced load on OCSP responder Why it’s not OK? • Stapled OCSP responses are optional and may be stripped by MITM • OCSP responder is DDoS target (if replay -
Insight MFR By
Manufacturers, Publishers and Suppliers by Product Category 11/6/2017 10/100 Hubs & Switches ASCEND COMMUNICATIONS CIS SECURE COMPUTING INC DIGIUM GEAR HEAD 1 TRIPPLITE ASUS Cisco Press D‐LINK SYSTEMS GEFEN 1VISION SOFTWARE ATEN TECHNOLOGY CISCO SYSTEMS DUALCOMM TECHNOLOGY, INC. GEIST 3COM ATLAS SOUND CLEAR CUBE DYCONN GEOVISION INC. 4XEM CORP. ATLONA CLEARSOUNDS DYNEX PRODUCTS GIGAFAST 8E6 TECHNOLOGIES ATTO TECHNOLOGY CNET TECHNOLOGY EATON GIGAMON SYSTEMS LLC AAXEON TECHNOLOGIES LLC. AUDIOCODES, INC. CODE GREEN NETWORKS E‐CORPORATEGIFTS.COM, INC. GLOBAL MARKETING ACCELL AUDIOVOX CODI INC EDGECORE GOLDENRAM ACCELLION AVAYA COMMAND COMMUNICATIONS EDITSHARE LLC GREAT BAY SOFTWARE INC. ACER AMERICA AVENVIEW CORP COMMUNICATION DEVICES INC. EMC GRIFFIN TECHNOLOGY ACTI CORPORATION AVOCENT COMNET ENDACE USA H3C Technology ADAPTEC AVOCENT‐EMERSON COMPELLENT ENGENIUS HALL RESEARCH ADC KENTROX AVTECH CORPORATION COMPREHENSIVE CABLE ENTERASYS NETWORKS HAVIS SHIELD ADC TELECOMMUNICATIONS AXIOM MEMORY COMPU‐CALL, INC EPIPHAN SYSTEMS HAWKING TECHNOLOGY ADDERTECHNOLOGY AXIS COMMUNICATIONS COMPUTER LAB EQUINOX SYSTEMS HERITAGE TRAVELWARE ADD‐ON COMPUTER PERIPHERALS AZIO CORPORATION COMPUTERLINKS ETHERNET DIRECT HEWLETT PACKARD ENTERPRISE ADDON STORE B & B ELECTRONICS COMTROL ETHERWAN HIKVISION DIGITAL TECHNOLOGY CO. LT ADESSO BELDEN CONNECTGEAR EVANS CONSOLES HITACHI ADTRAN BELKIN COMPONENTS CONNECTPRO EVGA.COM HITACHI DATA SYSTEMS ADVANTECH AUTOMATION CORP. BIDUL & CO CONSTANT TECHNOLOGIES INC Exablaze HOO TOO INC AEROHIVE NETWORKS BLACK BOX COOL GEAR EXACQ TECHNOLOGIES INC HP AJA VIDEO SYSTEMS BLACKMAGIC DESIGN USA CP TECHNOLOGIES EXFO INC HP INC ALCATEL BLADE NETWORK TECHNOLOGIES CPS EXTREME NETWORKS HUAWEI ALCATEL LUCENT BLONDER TONGUE LABORATORIES CREATIVE LABS EXTRON HUAWEI SYMANTEC TECHNOLOGIES ALLIED TELESIS BLUE COAT SYSTEMS CRESTRON ELECTRONICS F5 NETWORKS IBM ALLOY COMPUTER PRODUCTS LLC BOSCH SECURITY CTC UNION TECHNOLOGIES CO FELLOWES ICOMTECH INC ALTINEX, INC.