{"id":450,"date":"2012-05-15T09:08:05","date_gmt":"2012-05-15T08:08:05","guid":{"rendered":"https:\/\/securite.intrinsec.com:443\/?p=450"},"modified":"2012-05-15T09:08:05","modified_gmt":"2012-05-15T08:08:05","slug":"ipv6-et-la-securite-nouvelles-du-front-mai","status":"publish","type":"post","link":"https:\/\/www.intrinsec.com\/en\/ipv6-et-la-securite-nouvelles-du-front-mai\/","title":{"rendered":"IPv6 and security: news from the front \u2013 May"},"content":{"rendered":"<p><strong>Published articles<\/strong><\/p>\n<p>Yoann Queret wrote a <a href=\"http:\/\/www.queret.net\/blog\/2012\/04\/357\/\">article<\/a> In his blog, he provides a &quot;brief overview of IPv6 support&quot; in the new version of Ubuntu, version 12.04 LTS. A significant change has been made to the IPv6 stack, as RFC 4941 is now used by default. As a result, IPv6 addresses are no longer generated from the MAC address, but randomly.<\/p>\n<p>Fernando Gont wrote a <em>draft<\/em> titled &quot;\u00ab\u00a0<a href=\"https:\/\/tools.ietf.org\/html\/draft-gont-opsec-ipv6-implications-on-ipv4-nets-00\">Security Implications of IPv6 on IPv4 networks<\/a>\u00a0\u00bbHe briefly explains the risks posed by native IPv6 support and by v4\/v6 encapsulation mechanisms. He mainly details how to filter 6to4, ISATAP, Teredo, and 6over4 tunnels. His explanations remain theoretical and are not linked to any specific technology.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Conferences<\/strong><\/p>\n<p>A <a href=\"http:\/\/ipv6forum.no\/ipv6-konferansen\/ipv6-konferansen-i-oslo-april-2012\/\">conference<\/a> The conference on IPv6, organized by IKT-Norge, took place in Oslo on April 24 and 25. Some presentations addressed the topic of security with IPv6.<\/p>\n<p>Henrik Str\u00f8m, Head of IT Security and CERT manager at <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Telenor\">Telenor<\/a>, presented &quot;\u00ab\u00a0<a href=\"http:\/\/www.slideshare.net\/IKTNorge\/henrik-strm-ipv6-from-the-attackers-perspective\">IPv6 \u2013 Attacker&#039;s perspective<\/a>\u00a0\u00bbHe summarizes in a few slides the risks associated with IPv6 and the countermeasures that can be taken. Here are his conclusions:<\/p>\n<ul>\n<li>IPv6 can be secure, but work is needed to make it happen.<\/li>\n<li>Security is neither included nor enabled by default.<\/li>\n<li>There are many security issues that need to be addressed.<\/li>\n<li>It becomes even more important to monitor logs and analyze network traffic.<\/li>\n<li>Large network segments are always a bad idea<\/li>\n<li>IPv6 can be used by an attacker even if legitimate users and applications do not use it.<\/li>\n<\/ul>\n<p>Eric Vyncke, CTO\/Consulting Engineering and Distinguished Engineer at Cisco, gave two presentations. The first is entitled &quot;\u00ab\u00a0<a href=\"http:\/\/www.slideshare.net\/IKTNorge\/eric-vyncke-ipv6-security-in-general\">IPv6 security; myths and realities\u00a0<\/a>\u00bbIt presents the various attacks on IPv6, as well as the Cisco technologies used to counter them. It concludes with the following points:<\/p>\n<ul>\n<li>There&#039;s nothing really new with IPv6<\/li>\n<li>Lack of experience with IPv6 could temporarily reduce security levels; training is essential.<\/li>\n<li>It is possible to maintain the level of security (IPv6 traffic can be controlled like IPv4 traffic)<\/li>\n<li>The use of IPsec should be reserved for certain situations.<\/li>\n<\/ul>\n<p>His second presentation is entitled &quot;\u00ab\u00a0<a href=\"http:\/\/www.slideshare.net\/IKTNorge\/eric-vyncke-layer2-security-ipv6-norway\">Layer-2 insecurities of IPv6\u00a0<\/a>\u00bbAttacks affecting a local network (layer 2) are presented, along with methods, primarily Cisco-based, to protect against them: <em>rogue<\/em> RA, SeND, CGA, RA-Guard, NDP <em>spoofing<\/em>, etc. Here are the elements of the conclusion:<\/p>\n<ul>\n<li>Without security at level 2, there is no security at higher levels.<\/li>\n<li>The main threat is the <em>rogues<\/em> RA<\/li>\n<li>There are protection methods (host isolation, SeND and SAVI-based techniques)<\/li>\n<li>To protect against Neighbor Cache fill-up, a good implementation or a specific configuration associated with ACLs must be used.<\/li>\n<li>Solutions implementing these techniques already exist.<\/li>\n<\/ul>\n<p>At the ATHCON 2012 conference, George Kargiotakis gave a presentation entitled &quot;\u00ab\u00a0<a href=\"https:\/\/void.gr\/kargig\/presentations\/athcon_2012_kargig.pdf\">Are you ready for IPv6 insecurities?\u00a0<\/a>\u00bbAfter a review of IPv6, he presents the possible attacks. Here is part of the presentation outline:<\/p>\n<ul>\n<li>IPv6 Security Considerations<\/li>\n<li>IPv6 Security Hype<\/li>\n<li>IPv6 Common Local Attacks<\/li>\n<li>Fragmentation Issues<\/li>\n<li>Remote Network Scanning<\/li>\n<li>Local Network Scanning<\/li>\n<li>IDS \/ Firewall<\/li>\n<li>OS Support<\/li>\n<li>IPv6 Migration Security<\/li>\n<li>Internet IPv6 Scanning<\/li>\n<\/ul>\n<p>Interestingly, George Kargiotakis conducted a test showing that most ISPs have their routers&#039; Telnet or SSH services accessible via IPv6, but not via IPv4. 40 of the routers tested had one of these services accessible via IPv6, compared to 10 via IPv4.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Vulnerabilities<\/strong><\/p>\n<p>A vulnerability (CVSS Base Score 2.6) affecting Mozilla products (Firefox, Thunderbird and SeaMonkey) and allowing bypassing certain access controls has been discovered: <a href=\"https:\/\/www.mozilla.org\/security\/announce\/2012\/mfsa2012-28.html\">MFSA2012-28<\/a>, <a href=\"https:\/\/web.nvd.nist.gov\/view\/vuln\/detail?vulnId=CVE-2012-0475\">CVE-2012-0475<\/a>. This vulnerability is, however, difficult to exploit: it requires that a cross-site XHR or WebSocket request be opened on a non-standard web port on a web server using an IPv6 address of a particular form (two consecutive sixteen-bit fields must be zero).<\/p>\n<p>Another vulnerability (CVSS Base Score 7.1) affecting Cisco IOS 15.1 and 15.2 products has been published: <a href=\"https:\/\/web.nvd.nist.gov\/view\/vuln\/detail?vulnId=CVE-2012-1324\">CVE-2012-1324<\/a>. This vulnerability allows a device to crash by sending an IPv6 packet, if the device has a particular configuration.<\/p>\n<p>A vulnerability (CVSS Base Score 6.8) affecting Windows Server 2008 R2 and Windows 7 has been published: <a href=\"https:\/\/technet.microsoft.com\/en-us\/security\/bulletin\/ms12-032\">MS12-032<\/a>, <a href=\"https:\/\/web.nvd.nist.gov\/view\/vuln\/detail?vulnId=CVE-2012-0179\">CVE-2012-0179<\/a>. This vulnerability allows for privilege escalation by exploiting a problem during IPv6 address assignment. Failure to exploit this vulnerability causes the equipment to crash.<\/p>","protected":false},"excerpt":{"rendered":"<p>Articles publi\u00e9s Yoann Queret a \u00e9crit un article dans son blog o\u00f9 il y fait [&hellip;]<\/p>\n","protected":false},"author":13,"featured_media":51,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22],"tags":[46],"class_list":["post-450","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-veille-securite","tag-ipv6"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.0 (Yoast SEO v28.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>IPv6 et la s\u00e9curit\u00e9 : nouvelles du front \u2013 mai - INTRINSEC<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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