{"id":2077,"date":"2014-02-17T11:00:15","date_gmt":"2014-02-17T16:00:15","guid":{"rendered":"http:\/\/sqlity.net\/en\/?p=2077"},"modified":"2014-11-13T13:15:54","modified_gmt":"2014-11-13T18:15:54","slug":"preventing-cascading-revokes","status":"publish","type":"post","link":"https:\/\/sqlity.net\/en\/2077\/preventing-cascading-revokes\/","title":{"rendered":"Permission Delegation Done Right – Preventing Cascading Revokes"},"content":{"rendered":"
\n

Introduction<\/h3>\n

\nOver the last few weeks I have written quite a few posts about grantable grants. For example the introductory article about how GRANT ... WITH GRANT OPTION<\/span> can help with security management delegation<\/a>. But then there was the other article on how REVOKE CASCADE<\/span> can make security management delegation questionable at best<\/a>, as the CASCADE<\/span> keyword is required when revoking a grantable grant. That causes all the \"grant\"-work that a security principal did while it held the grantable grant to be undone if the permissions needs to be removed from that principal.\n<\/p>\n

\nToday I want to show you, how you can use grantable grants while avoiding the problems that come with the CASCADE<\/span> keyword.\n<\/p>\n

Using Roles for Grantable Grants<\/h3>\n

\nTo get around the cascading problem we can use roles in combination with grantable grants. If you need a quick refresher on roles, check out my posts on database roles<\/a> and server roles<\/a>.\n<\/p>\n

\nTo see how roles can help alleviate the cascade problem let's look at an example. First we need a securable, a role and two principals:\n<\/p>\n

\n[sql]\nCREATE LOGIN TestLogin1 WITH PASSWORD='********', CHECK_POLICY = OFF;
\nCREATE LOGIN TestLogin2 WITH PASSWORD='********', CHECK_POLICY = OFF;<\/p>\n

CREATE USER TestUser1 FOR LOGIN TestLogin1;
\nCREATE USER TestUser2 FOR LOGIN TestLogin2;<\/p>\n

CREATE ROLE TestRole1;
\nALTER ROLE TestRole1 ADD MEMBER TestUser1;
\nGO
\nCREATE SCHEMA TestSchema1;
\nGO
\nCREATE TABLE TestSchema1.tst(id INT);
\nINSERT INTO TestSchema1.tst VALUES(42);
\n[\/sql]\n<\/p><\/div>\n

\nThe above code also added the principal TestUser1<\/span> as a member to the role. Now instead of granting a grantable permission to our principal directly, we are going to grant it to the role. As the principal TestUser1<\/span> is a member of that role, it inherits the grantable permission. However, as shown in Using GRANT ... WITH GRANT OPTION<\/span> on roles<\/a>, TestUser1<\/span> now needs to use the AS TestRole1<\/span> postfix when trying to grant the permission to another principal:\n<\/p>\n

\n\"Grantable<\/a>\n<\/p>\n

\nAs you can see, TestUser1<\/span> is able to grant the permission to other principals. If we now need to revoke that right, we can just drop TestUser1<\/span> from the role:\n<\/p>\n

\n\"Revoking<\/a>\n<\/p>\n

\nAfter the drop, TestUser1<\/span> cannot access the table anymore (and consequently cannot grant access to it anymore either). However, TestUser2<\/span>'s ability to access the table was not affected.\n<\/p>\n

Summary<\/h3>\n

\nYou can use roles in conjunction with grantable grants to get the benefits of permission delegation without the disadvantages that come from the requirement to use CASCADE<\/span> when revoking a grantable permission.\n<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Grantable grant are an easy way to delegate permission management. However, revoking a grantable grant can cause trouble. Read on to see how using roles in conjunction with grantable grants can alleviate that problem.<\/p>\n

[more…]<\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[5,34],"tags":[57,88,50,98,38,58,55,15],"class_list":["post-2077","post","type-post","status-publish","format-standard","hentry","category-general","category-security","tag-database-roles","tag-grant","tag-permission","tag-revoke","tag-security-2","tag-security-management","tag-server-roles","tag-sql-server"],"acf":[],"yoast_head":"\nPermission Delegation Done Right - Preventing Cascading Revokes - sqlity.net<\/title>\n<meta name=\"description\" content=\"Grantable grant are an easy way to delegate permission management. However, revoking them can cause trouble. Using roles can alleviate that problem.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sqlity.net\/en\/2077\/preventing-cascading-revokes\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Permission Delegation Done Right - Preventing Cascading Revokes - sqlity.net\" \/>\n<meta property=\"og:description\" content=\"Grantable grant are an easy way to delegate permission management. However, revoking them can cause trouble. Using roles can alleviate that problem.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/sqlity.net\/en\/2077\/preventing-cascading-revokes\/\" \/>\n<meta property=\"og:site_name\" content=\"sqlity.net\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/sqlity.net\" \/>\n<meta property=\"article:published_time\" content=\"2014-02-17T16:00:15+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2014-11-13T18:15:54+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/sqlity.net\/wp-content\/uploads\/2014\/02\/Grantable_Grant_to_a_Role_in_action.jpg\" \/>\n<meta name=\"author\" content=\"Sebastian Meine\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@sqlity\" \/>\n<meta name=\"twitter:site\" content=\"@sqlity\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Sebastian Meine\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/sqlity.net\\\/en\\\/2077\\\/preventing-cascading-revokes\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/sqlity.net\\\/en\\\/2077\\\/preventing-cascading-revokes\\\/\"},\"author\":{\"name\":\"Sebastian Meine\",\"@id\":\"https:\\\/\\\/sqlity.net\\\/en\\\/#\\\/schema\\\/person\\\/bcffd8c572bc2f1bd10fdba80135e53c\"},\"headline\":\"Permission Delegation Done Right – Preventing Cascading Revokes\",\"datePublished\":\"2014-02-17T16:00:15+00:00\",\"dateModified\":\"2014-11-13T18:15:54+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/sqlity.net\\\/en\\\/2077\\\/preventing-cascading-revokes\\\/\"},\"wordCount\":443,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/sqlity.net\\\/en\\\/2077\\\/preventing-cascading-revokes\\\/#primaryimage\"},\"thumbnailUrl\":\"http:\\\/\\\/sqlity.net\\\/wp-content\\\/uploads\\\/2014\\\/02\\\/Grantable_Grant_to_a_Role_in_action.jpg\",\"keywords\":[\"database roles\",\"GRANT\",\"Permission\",\"REVOKE\",\"security\",\"security management\",\"server roles\",\"SQL Server\"],\"articleSection\":[\"General\",\"Security\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/sqlity.net\\\/en\\\/2077\\\/preventing-cascading-revokes\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/sqlity.net\\\/en\\\/2077\\\/preventing-cascading-revokes\\\/\",\"url\":\"https:\\\/\\\/sqlity.net\\\/en\\\/2077\\\/preventing-cascading-revokes\\\/\",\"name\":\"Permission Delegation Done Right - Preventing Cascading Revokes - sqlity.net\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/sqlity.net\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/sqlity.net\\\/en\\\/2077\\\/preventing-cascading-revokes\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/sqlity.net\\\/en\\\/2077\\\/preventing-cascading-revokes\\\/#primaryimage\"},\"thumbnailUrl\":\"http:\\\/\\\/sqlity.net\\\/wp-content\\\/uploads\\\/2014\\\/02\\\/Grantable_Grant_to_a_Role_in_action.jpg\",\"datePublished\":\"2014-02-17T16:00:15+00:00\",\"dateModified\":\"2014-11-13T18:15:54+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/sqlity.net\\\/en\\\/#\\\/schema\\\/person\\\/bcffd8c572bc2f1bd10fdba80135e53c\"},\"description\":\"Grantable grant are an easy way to delegate permission management. However, revoking them can cause trouble. Using roles can alleviate that problem.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/sqlity.net\\\/en\\\/2077\\\/preventing-cascading-revokes\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/sqlity.net\\\/en\\\/2077\\\/preventing-cascading-revokes\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/sqlity.net\\\/en\\\/2077\\\/preventing-cascading-revokes\\\/#primaryimage\",\"url\":\"http:\\\/\\\/sqlity.net\\\/wp-content\\\/uploads\\\/2014\\\/02\\\/Grantable_Grant_to_a_Role_in_action.jpg\",\"contentUrl\":\"http:\\\/\\\/sqlity.net\\\/wp-content\\\/uploads\\\/2014\\\/02\\\/Grantable_Grant_to_a_Role_in_action.jpg\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/sqlity.net\\\/en\\\/2077\\\/preventing-cascading-revokes\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/sqlity.net\\\/en\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Permission Delegation Done Right – Preventing Cascading Revokes\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/sqlity.net\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/sqlity.net\\\/en\\\/\",\"name\":\"sqlity.net\",\"description\":\"Quality for SQL\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/sqlity.net\\\/en\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/sqlity.net\\\/en\\\/#\\\/schema\\\/person\\\/bcffd8c572bc2f1bd10fdba80135e53c\",\"name\":\"Sebastian Meine\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/4ab0a6d02dd494849a584a2c3c8bc3bdcef1d0aa5f87e98bf905dbdb9ad2ce3a?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/4ab0a6d02dd494849a584a2c3c8bc3bdcef1d0aa5f87e98bf905dbdb9ad2ce3a?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/4ab0a6d02dd494849a584a2c3c8bc3bdcef1d0aa5f87e98bf905dbdb9ad2ce3a?s=96&d=mm&r=g\",\"caption\":\"Sebastian Meine\"},\"sameAs\":[\"http:\\\/\\\/sqlity.net\",\"https:\\\/\\\/x.com\\\/sqlity\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Permission Delegation Done Right - Preventing Cascading Revokes - sqlity.net","description":"Grantable grant are an easy way to delegate permission management. However, revoking them can cause trouble. Using roles can alleviate that problem.","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:\/\/sqlity.net\/en\/2077\/preventing-cascading-revokes\/","og_locale":"en_US","og_type":"article","og_title":"Permission Delegation Done Right - Preventing Cascading Revokes - sqlity.net","og_description":"Grantable grant are an easy way to delegate permission management. However, revoking them can cause trouble. Using roles can alleviate that problem.","og_url":"https:\/\/sqlity.net\/en\/2077\/preventing-cascading-revokes\/","og_site_name":"sqlity.net","article_publisher":"https:\/\/www.facebook.com\/sqlity.net","article_published_time":"2014-02-17T16:00:15+00:00","article_modified_time":"2014-11-13T18:15:54+00:00","og_image":[{"url":"http:\/\/sqlity.net\/wp-content\/uploads\/2014\/02\/Grantable_Grant_to_a_Role_in_action.jpg","type":"","width":"","height":""}],"author":"Sebastian Meine","twitter_card":"summary_large_image","twitter_creator":"@sqlity","twitter_site":"@sqlity","twitter_misc":{"Written by":"Sebastian Meine","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/sqlity.net\/en\/2077\/preventing-cascading-revokes\/#article","isPartOf":{"@id":"https:\/\/sqlity.net\/en\/2077\/preventing-cascading-revokes\/"},"author":{"name":"Sebastian Meine","@id":"https:\/\/sqlity.net\/en\/#\/schema\/person\/bcffd8c572bc2f1bd10fdba80135e53c"},"headline":"Permission Delegation Done Right – Preventing Cascading Revokes","datePublished":"2014-02-17T16:00:15+00:00","dateModified":"2014-11-13T18:15:54+00:00","mainEntityOfPage":{"@id":"https:\/\/sqlity.net\/en\/2077\/preventing-cascading-revokes\/"},"wordCount":443,"commentCount":0,"image":{"@id":"https:\/\/sqlity.net\/en\/2077\/preventing-cascading-revokes\/#primaryimage"},"thumbnailUrl":"http:\/\/sqlity.net\/wp-content\/uploads\/2014\/02\/Grantable_Grant_to_a_Role_in_action.jpg","keywords":["database roles","GRANT","Permission","REVOKE","security","security management","server roles","SQL Server"],"articleSection":["General","Security"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/sqlity.net\/en\/2077\/preventing-cascading-revokes\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/sqlity.net\/en\/2077\/preventing-cascading-revokes\/","url":"https:\/\/sqlity.net\/en\/2077\/preventing-cascading-revokes\/","name":"Permission Delegation Done Right - Preventing Cascading Revokes - sqlity.net","isPartOf":{"@id":"https:\/\/sqlity.net\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/sqlity.net\/en\/2077\/preventing-cascading-revokes\/#primaryimage"},"image":{"@id":"https:\/\/sqlity.net\/en\/2077\/preventing-cascading-revokes\/#primaryimage"},"thumbnailUrl":"http:\/\/sqlity.net\/wp-content\/uploads\/2014\/02\/Grantable_Grant_to_a_Role_in_action.jpg","datePublished":"2014-02-17T16:00:15+00:00","dateModified":"2014-11-13T18:15:54+00:00","author":{"@id":"https:\/\/sqlity.net\/en\/#\/schema\/person\/bcffd8c572bc2f1bd10fdba80135e53c"},"description":"Grantable grant are an easy way to delegate permission management. However, revoking them can cause trouble. Using roles can alleviate that problem.","breadcrumb":{"@id":"https:\/\/sqlity.net\/en\/2077\/preventing-cascading-revokes\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/sqlity.net\/en\/2077\/preventing-cascading-revokes\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/sqlity.net\/en\/2077\/preventing-cascading-revokes\/#primaryimage","url":"http:\/\/sqlity.net\/wp-content\/uploads\/2014\/02\/Grantable_Grant_to_a_Role_in_action.jpg","contentUrl":"http:\/\/sqlity.net\/wp-content\/uploads\/2014\/02\/Grantable_Grant_to_a_Role_in_action.jpg"},{"@type":"BreadcrumbList","@id":"https:\/\/sqlity.net\/en\/2077\/preventing-cascading-revokes\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/sqlity.net\/en\/"},{"@type":"ListItem","position":2,"name":"Permission Delegation Done Right – Preventing Cascading Revokes"}]},{"@type":"WebSite","@id":"https:\/\/sqlity.net\/en\/#website","url":"https:\/\/sqlity.net\/en\/","name":"sqlity.net","description":"Quality for SQL","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/sqlity.net\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/sqlity.net\/en\/#\/schema\/person\/bcffd8c572bc2f1bd10fdba80135e53c","name":"Sebastian Meine","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/4ab0a6d02dd494849a584a2c3c8bc3bdcef1d0aa5f87e98bf905dbdb9ad2ce3a?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/4ab0a6d02dd494849a584a2c3c8bc3bdcef1d0aa5f87e98bf905dbdb9ad2ce3a?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/4ab0a6d02dd494849a584a2c3c8bc3bdcef1d0aa5f87e98bf905dbdb9ad2ce3a?s=96&d=mm&r=g","caption":"Sebastian Meine"},"sameAs":["http:\/\/sqlity.net","https:\/\/x.com\/sqlity"]}]}},"jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2wXuw-xv","jetpack-related-posts":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/sqlity.net\/en\/wp-json\/wp\/v2\/posts\/2077","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sqlity.net\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sqlity.net\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sqlity.net\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/sqlity.net\/en\/wp-json\/wp\/v2\/comments?post=2077"}],"version-history":[{"count":0,"href":"https:\/\/sqlity.net\/en\/wp-json\/wp\/v2\/posts\/2077\/revisions"}],"wp:attachment":[{"href":"https:\/\/sqlity.net\/en\/wp-json\/wp\/v2\/media?parent=2077"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sqlity.net\/en\/wp-json\/wp\/v2\/categories?post=2077"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sqlity.net\/en\/wp-json\/wp\/v2\/tags?post=2077"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}