{"id":2337,"date":"2016-04-15T06:22:13","date_gmt":"2016-04-14T21:22:13","guid":{"rendered":"http:\/\/www.catracing.org\/hendrb\/?p=2337"},"modified":"2018-03-20T21:47:38","modified_gmt":"2018-03-20T12:47:38","slug":"linux-alert","status":"publish","type":"post","link":"https:\/\/www.catracing.org\/hendrb\/linux-alert\/","title":{"rendered":"LINUX Alert! &#8211; SAMBA update 4.2.10-6.el7 Breaks Active Directory Authentication."},"content":{"rendered":"<h2><span style=\"color: #0000ff;\">Active Directory Authentication Breaks After Installing SAMBA 4.2.10-6.el7_2<\/span><\/h2>\n<h3><span style=\"text-decoration: underline;\"><span style=\"color: #ff0000;\">This Issue Has Been Resolved! <\/span><\/span><span style=\"color: #ff0000;\">See Post &#8211; <a href=\"http:\/\/www.catracing.org\/hendrb\/post-update-active-directory-authentication-fixed-samba-update-4-2-10-6-2-el7_2\/\"><span style=\"color: #ffff00;\">http:\/\/www.catracing.org\/hendrb\/post-update-active-directory-authentication-fixed-samba-update-4-2-10-6-2-el7_2\/<\/span> <span style=\"color: #ff0000;\">For additional information!<\/span><\/a><\/span><\/h3>\n<p>This is not going to be a very long technical post, but I did want to get the word out that the latest update to the SAMBA client broke Active Directory authentication on my web server, and how to fix the issue.<\/p>\n<p>While applying Windows Update fixes to my Windows servers, I also checked for updates on my CENT-OS box, and lo and behold there were quite a bit of updates, one being another SAMBA update. I can not remember a time where a package update broke something on my production box, the only other times I have had serious issue is after installing kernel updates.&nbsp; So needless to say I was quite shocked after rebooting the server (Runs as a virtual machine on top of the Windows box that had rebootable updates installed).&nbsp; I could no longer login with my AD account.&nbsp; NOT GOOD!&nbsp; Fortunately checking to make sure I can login as root and my local account is part of my pre-update checks.<\/p>\n<p><a href=\"http:\/\/www.catracing.org\/hendrb\/wp-content\/uploads\/2016\/04\/Packages.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-2338\" src=\"http:\/\/www.catracing.org\/hendrb\/wp-content\/uploads\/2016\/04\/Packages.jpg\" alt=\"Packages\" width=\"731\" height=\"461\" srcset=\"https:\/\/www.catracing.org\/hendrb\/wp-content\/uploads\/2016\/04\/Packages.jpg 731w, https:\/\/www.catracing.org\/hendrb\/wp-content\/uploads\/2016\/04\/Packages-300x189.jpg 300w, https:\/\/www.catracing.org\/hendrb\/wp-content\/uploads\/2016\/04\/Packages-476x300.jpg 476w\" sizes=\"auto, (max-width: 731px) 100vw, 731px\" \/><\/a><\/p>\n<p>After the updates and a reboot of the server you can see it is not allowing me to login with my domain account.<\/p>\n<p><a href=\"http:\/\/www.catracing.org\/hendrb\/wp-content\/uploads\/2016\/04\/Login-Failed.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2339\" src=\"http:\/\/www.catracing.org\/hendrb\/wp-content\/uploads\/2016\/04\/Login-Failed.jpg\" alt=\"Login Failed\" width=\"431\" height=\"214\" srcset=\"https:\/\/www.catracing.org\/hendrb\/wp-content\/uploads\/2016\/04\/Login-Failed.jpg 431w, https:\/\/www.catracing.org\/hendrb\/wp-content\/uploads\/2016\/04\/Login-Failed-300x149.jpg 300w\" sizes=\"auto, (max-width: 431px) 100vw, 431px\" \/><\/a><br \/>\nHere are the error message logged in \/var\/log\/secure<br \/>\n(Server hostname has been replaced with ****)<\/p>\n<p><span style=\"color: #00ffff;\">Apr 14 13:50:53 **** polkitd[804]: Registered Authentication Agent for unix-session:c1 (system bus name :1.28 [gnome-shell &#8211;mode=gdm], object path \/org\/freedesktop\/PolicyKit1\/AuthenticationAgent, locale en_US.UTF-8)<\/span><\/p>\n<p><span style=\"color: #00ffff;\">Apr 14 13:51:33 **** gdm-password]: pam_unix(gdm-password:auth): check pass; user unknown<\/span><\/p>\n<p><span style=\"color: #00ffff;\">Apr 14 13:51:33 **** gdm-password]: pam_unix(gdm-password:auth): authentication failure; logname= uid=0 euid=0 tty= ruser= rhost=<\/span><\/p>\n<p>I promptly removed the updated version of SAMBA and reinstalled the previous version. I always take a screen capture of the what yum is going to update before answering yes.&nbsp; This makes an easy reference in case I need to go back and remove anything.&nbsp; In this case I need to remove the following packages.<\/p>\n<p><span style=\"color: #ffff00;\">&nbsp;samba&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; x86_64 &nbsp;&nbsp;4.2.10-6.el7_2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; updates&nbsp;&nbsp; 614 k<\/span><br \/>\n<span style=\"color: #ffff00;\">&nbsp;samba-client&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;x86_64&nbsp;&nbsp; 4.2.10-6.el7_2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; updates&nbsp;&nbsp; 496k<\/span><br \/>\n<span style=\"color: #ffff00;\">&nbsp;samba-client-libs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; x86_64&nbsp;&nbsp; 4.2.10-6.el7_2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; updates&nbsp;&nbsp; 4.3 M&nbsp;&nbsp;&nbsp;&nbsp;<\/span><br \/>\n<span style=\"color: #ffff00;\">&nbsp;samba-common&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;noarch&nbsp;&nbsp; 4.2.10-6.el7_2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; updates&nbsp;&nbsp; 272 k<\/span><br \/>\n<span style=\"color: #ffff00;\">&nbsp;samba-common-libs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; x86_64 &nbsp;&nbsp;4.2.10-6.el7_2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; updates&nbsp;&nbsp; 156 k<\/span><br \/>\n<span style=\"color: #ffff00;\">&nbsp;samba-common-tools&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;x86_64 &nbsp;&nbsp;4.2.10-6.el7_2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; updates&nbsp;&nbsp; 444 k<\/span><br \/>\n<span style=\"color: #ffff00;\">&nbsp;samba-libs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; x86_64&nbsp;&nbsp; 4.2.10-6.el7_2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; updates&nbsp;&nbsp; 260 k<\/span><br \/>\n<span style=\"color: #ffff00;\">&nbsp;samba-winbind&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; x86_64&nbsp;&nbsp; 4.2.10-6.el7_2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; updates&nbsp;&nbsp; 465 k<\/span><br \/>\n<span style=\"color: #ffff00;\">&nbsp;samba-winbind-modules&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; x86_64&nbsp;&nbsp;4.2.10-6.el7_2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;updates&nbsp;&nbsp; 105 k<\/span><\/p>\n<p><span style=\"color: #ffff00;\">$ yum remove samba samba-client samb-client-libs samba-common samba-common-libs samba-common-tools samba-libs samba-winbind samba-winbind-modules<\/span><\/p>\n<p>Once samba, and samba-winbind have been uninstalled, we need to install the previous version, again the listing I keep of all updates installed on the server come in handy, as I know SAMBA was updated back in January.<\/p>\n<p><span style=\"color: #00ffff;\">samba-client&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; x86_64&nbsp;&nbsp;&nbsp;&nbsp; 4.2.3-11.el7_2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; updates&nbsp;&nbsp;&nbsp;&nbsp; 496 k<\/span><br \/>\n<span style=\"color: #00ffff;\">samba-client-libs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; x86_64&nbsp;&nbsp;&nbsp;&nbsp; 4.2.3-11.el7_2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; updates&nbsp;&nbsp;&nbsp;&nbsp; 4.3 M<\/span><br \/>\n<span style=\"color: #00ffff;\">samba-common&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;noarch&nbsp;&nbsp;&nbsp;&nbsp; 4.2.3-11.el7_2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; updates&nbsp;&nbsp;&nbsp;&nbsp; 269 k<\/span><br \/>\n<span style=\"color: #00ffff;\">samba-common-libs&nbsp;&nbsp;x86_64&nbsp;&nbsp;&nbsp;&nbsp; 4.2.3-11.el7_2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; updates&nbsp;&nbsp;&nbsp;&nbsp; 156 k<\/span><br \/>\n<span style=\"color: #00ffff;\">samba-common-tools x86_64&nbsp;&nbsp;&nbsp;&nbsp;4.2.3-11.el7_2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; updates&nbsp;&nbsp;&nbsp;&nbsp; 443 k<\/span><br \/>\n<span style=\"color: #00ffff;\">samba-libs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; x86_64&nbsp;&nbsp;&nbsp;&nbsp; 4.2.3-11.el7_2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; updates&nbsp;&nbsp;&nbsp;&nbsp; 259 k<\/span><br \/>\n<span style=\"color: #00ffff;\">samba-winbind&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;x86_64&nbsp;&nbsp;&nbsp;&nbsp; 4.2.3-11.el7_2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; updates&nbsp;&nbsp;&nbsp;&nbsp; 463 k<\/span><br \/>\n<span style=\"color: #00ffff;\">samba-winbind-modules&nbsp;x86_64&nbsp;4.2.3-11.el7_2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;updates&nbsp;&nbsp;&nbsp;&nbsp; 104 k<\/span><\/p>\n<p>First let\u2019s get the package names for all available versions of samba<\/p>\n<p><span style=\"color: #ffff00;\">$ yum \u2013showduplicates list samba<\/span><\/p>\n<p><a href=\"http:\/\/www.catracing.org\/hendrb\/wp-content\/uploads\/2016\/04\/Available-samba.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-2341\" src=\"http:\/\/www.catracing.org\/hendrb\/wp-content\/uploads\/2016\/04\/Available-samba.jpg\" alt=\"Available samba\" width=\"1300\" height=\"82\" srcset=\"https:\/\/www.catracing.org\/hendrb\/wp-content\/uploads\/2016\/04\/Available-samba.jpg 1300w, https:\/\/www.catracing.org\/hendrb\/wp-content\/uploads\/2016\/04\/Available-samba-300x19.jpg 300w, https:\/\/www.catracing.org\/hendrb\/wp-content\/uploads\/2016\/04\/Available-samba-768x48.jpg 768w, https:\/\/www.catracing.org\/hendrb\/wp-content\/uploads\/2016\/04\/Available-samba-1024x65.jpg 1024w, https:\/\/www.catracing.org\/hendrb\/wp-content\/uploads\/2016\/04\/Available-samba-500x32.jpg 500w\" sizes=\"auto, (max-width: 1300px) 100vw, 1300px\" \/><\/a><\/p>\n<p>The update we want 4.2.3-11.el7-2 is available. So let\u2019s go ahead and install them.<\/p>\n<p><span style=\"color: #ffff00;\">$ yum install samba-0:4.2.3-11.el7_2.x86_64<\/span><\/p>\n<p>Once the samba client is installed we need to install samba-winbind<\/p>\n<p><span style=\"color: #ffff00;\">$ yum install samba_winbind-0:4.2.3-11.el7_2.x86_64<\/span><\/p>\n<p>Once this was complete, I rebooted the server, but was still unable to connect to the domain controller. Comparing files on my development server, I noticed that the \/etc\/samba\/smb.conf file was modified on the server during the removal of the samba package.&nbsp; Not to worry yum made a backup first.<\/p>\n<p><a href=\"http:\/\/www.catracing.org\/hendrb\/wp-content\/uploads\/2016\/04\/files.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2340 size-full\" src=\"http:\/\/www.catracing.org\/hendrb\/wp-content\/uploads\/2016\/04\/files.jpg\" alt=\"files\" width=\"423\" height=\"20\" srcset=\"https:\/\/www.catracing.org\/hendrb\/wp-content\/uploads\/2016\/04\/files.jpg 423w, https:\/\/www.catracing.org\/hendrb\/wp-content\/uploads\/2016\/04\/files-300x14.jpg 300w\" sizes=\"auto, (max-width: 423px) 100vw, 423px\" \/><\/a><\/p>\n<p>So let\u2019s remove the new smb.conf<\/p>\n<p><span style=\"color: #ffff00;\">$ rm smb.conf<\/span><\/p>\n<p>Now let\u2019s rename the smb.conf.rpmsave to smb.conf<\/p>\n<p><span style=\"color: #ffff00;\">$ mv smb.conf.rpmsave smb.conf<\/span><\/p>\n<p>Now let\u2019s go ahead and reboot (You don\u2019t need to, you can just shutdown your networking and samba service.), but a reboot never hurts.<\/p>\n<p><span style=\"color: #ffff00;\">$ reboot<\/span><\/p>\n<p>Test logging in with a domain account, if the login still fails, log back in as your local account and troubleshoot the AD connection.<\/p>\n<ol>\n<li>Is the time on the LINUX box within 5 minutes of the time on the Active Directory server? If no this will cause the Kerberos ticket issuance to fail<\/li>\n<li>Can you issue wbinfo commands.IE wbinfo -g or wbinfo -u. If not, you may have to rejoin the domain.<\/li>\n<\/ol>\n<p>These instructions should repair your domain authentication until the issue with the new version of SAMBA is resolved. I will keep working on a fix, unless another update fixes the problem.<\/p>\n<h4><span style=\"color: #ff0000;\">NOTE: If you know the fix for this issue with SAMBA update, please either shoot me an email, or post it to our forums or as a comment.&nbsp; You will get full credit for providing the fix.<\/span><\/h4>\n","protected":false},"excerpt":{"rendered":"<p>Active Directory Authentication Breaks After Installing SAMBA 4.2.10-6.el7_2 This Issue Has Been Resolved! See Post &#8211; http:\/\/www.catracing.org\/hendrb\/post-update-active-directory-authentication-fixed-samba-update-4-2-10-6-2-el7_2\/ For additional information! This is not going to be a very long technical post, but I did want to get the word out <span class=\"excerpt-dots\">&hellip;<\/span> <a class=\"more-link\" href=\"https:\/\/www.catracing.org\/hendrb\/linux-alert\/\"><span class=\"more-msg\">Continue reading &rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[3],"tags":[],"class_list":["post-2337","post","type-post","status-publish","format-standard","hentry","category-technical"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>LINUX Alert! - SAMBA update 4.2.10-6.el7 Breaks Active Directory Authentication. - Brent&#039;s World<\/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.catracing.org\/hendrb\/linux-alert\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"LINUX Alert! - SAMBA update 4.2.10-6.el7 Breaks Active Directory Authentication. - Brent&#039;s World\" \/>\n<meta property=\"og:description\" content=\"Active Directory Authentication Breaks After Installing SAMBA 4.2.10-6.el7_2 This Issue Has Been Resolved! 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