{"id":5852,"date":"2014-06-27T12:27:45","date_gmt":"2014-06-27T16:27:45","guid":{"rendered":"http:\/\/blog.nccomputertech.com\/?p=5852"},"modified":"2014-06-27T12:27:45","modified_gmt":"2014-06-27T16:27:45","slug":"running-wordpress-got-webshot-enabled-turn-it-off-or-youre-toast","status":"publish","type":"post","link":"https:\/\/nccomputertech.com\/techtalk\/2014\/06\/27\/running-wordpress-got-webshot-enabled-turn-it-off-or-youre-toast\/","title":{"rendered":"Running WordPress? Got webshot enabled? Turn it off or you\u2019re toast"},"content":{"rendered":"

A zero-day vulnerability in the popular TimThumb plugin for WordPress leaves many websites vulnerable to exploits that allow unauthorized attackers to execute malicious code, security researchers have warned.<\/p>\n

The vulnerability, which was disclosed Tuesday on the Full Disclosure mailing list, affects WordPress sites that have TimThumb installed with the webshot option enabled. Fortunately, it is disabled by default, and sites that are hosted on WordPress.com are also not susceptible. Still, at press time, there was no patch for the remote-code execution hole. People who are unsure if their WordPress-enabled site is vulnerable should open the timthumb file inside their theme or plugin directory, search for the text string “WEBSHOT_ENABLED,” and ensure that it’s set to false.<\/p>\n

When “WEBSHOT_ENABLED” is set to true, attackers can create or delete files and execute a variety of other commands, Daniel Cid, CTO of security firm Sucuri, warned in a blog post published Thursday. He said uploading a file to a vulnerable site was possible using URLs such as the following, where a.txt was the file being created:<\/p>\n

http:\/\/vulnerablesite.com\/wp-content\/plugins\/pluginX\/timthumb.php??webshot=1&src=http:\/\/vulnerablesite.com\/$(touch$IFS\/tmp\/a.txt)<\/p>\n

Another mitigating condition is that some firewalls will prevent attacks from working against otherwise vulnerable sites. Still, given the potential harm, operators of WordPress sites should double-check their settings to ensure webshot is disabled.<\/p>\n

via Running WordPress? Got webshot enabled? Turn it off or you\u2019re toast | Ars Technica<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

A zero-day vulnerability in the popular TimThumb plugin for WordPress leaves many websites vulnerable to exploits that allow unauthorized attackers […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_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":[7],"tags":[341,1243],"class_list":["post-5852","post","type-post","status-publish","format-standard","hentry","category-security","tag-exploit","tag-wordpress"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/papNkV-1wo","jetpack-related-posts":[{"id":7150,"url":"https:\/\/nccomputertech.com\/techtalk\/2014\/12\/17\/russian-malware-targets-wordpress-users-over-100000-sites-infected\/","url_meta":{"origin":5852,"position":0},"title":"Russian malware targets WordPress users, over 100,000 sites infected","author":"NCCT","date":"December 17, 2014","format":false,"excerpt":"Our blog was not affected...NCCT. A Russian malware dubbed SoakSoak has infected nearly 100,000 WordPress websites since Sunday, prompting Google to blacklist over 11,000 of those domains (the number is increasing), according to a report from cybersecurity firm Sucuri. The malware exploits a previously-known vulnerability in a WordPress plugin called\u2026","rel":"","context":"In "Security"","block_context":{"text":"Security","link":"https:\/\/nccomputertech.com\/techtalk\/category\/security\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":7112,"url":"https:\/\/nccomputertech.com\/techtalk\/2014\/12\/10\/researchers-say-poodle-can-be-repurposed-to-attack-tls-10-percent-of-the-servers-vulnerable\/","url_meta":{"origin":5852,"position":1},"title":"Researchers say Poodle can be repurposed to attack TLS, 10 percent of the servers vulnerable","author":"NCCT","date":"December 10, 2014","format":false,"excerpt":"A couple of months after researchers at Google uncovered POODLE (Padding Oracle On Downgraded Legacy Encryption), a vulnerability in a specific version of the SSL protocol, security firm Qualys has announced that the issue also affects implementations of the TLS protocol. 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The WordPress content management system used by millions of websites is vulnerable to two newly discovered threats that allow attackers to take full\u2026","rel":"","context":"In "Security"","block_context":{"text":"Security","link":"https:\/\/nccomputertech.com\/techtalk\/category\/security\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/img.youtube.com\/vi\/OCqQZJZ1Ie4\/0.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":8907,"url":"https:\/\/nccomputertech.com\/techtalk\/2016\/05\/04\/huge-number-of-sites-imperiled-by-critical-image-processing-vulnerability-updated\/","url_meta":{"origin":5852,"position":3},"title":"Huge number of sites imperiled by critical image-processing vulnerability [Updated]","author":"NCCT","date":"May 4, 2016","format":false,"excerpt":"By Dan Goodin | Ars Technica Attack code exploiting critical ImageMagick vulnerability expected within hours. 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