lixlpixel has reported a vulnerability in Mac OS X, potentially allowing malicious web sites to compromise a vulnerable system.<\/p>\n
The problem is that the “help” URI handler allows execution of arbitrary local scripts (.scpt) via the classic directory traversal character sequence using “help:runscript”.<\/p>\n
It is reportedly possible to place arbitrary files in a known location, including script files, on a user’s system if the Safari browser has been configured to (“Open “safe” files after download”) (default behaviour) by asking a user to download a “.dmg” (disk image) file.<\/p>\n
This has been confirmed on Macintosh OS X using Safari 1.2.1 (v125.1) and Internet Explorer 5.2.
\nUncheck (“Open “safe” files after download”) in “Safari -> Preferences -> General”.<\/p>\n
Do not surf the Internet as a privileged user.<\/p>\n
Rename the help URI handler.<\/p>\n
Provided and\/or discovered by: lixlpixel<\/p>\n
Proof of Concept: copy\/paste “help:\/\/cat \/etc\/passwd” in the address bar<\/p>\n
This is a harmless POC that will launch the help and dump the passwd file.<\/p>\n","protected":false},"excerpt":{"rendered":"
Mac OS X Help URI Handler Arbitrary Script Execution<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","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":""},"categories":[4],"tags":[],"class_list":["post-180","post","type-post","status-publish","format-standard","hentry","category-apple"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p4bBYZ-2U","_links":{"self":[{"href":"https:\/\/deepquest.code511.com\/blog\/wp-json\/wp\/v2\/posts\/180","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/deepquest.code511.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/deepquest.code511.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/deepquest.code511.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/deepquest.code511.com\/blog\/wp-json\/wp\/v2\/comments?post=180"}],"version-history":[{"count":0,"href":"https:\/\/deepquest.code511.com\/blog\/wp-json\/wp\/v2\/posts\/180\/revisions"}],"wp:attachment":[{"href":"https:\/\/deepquest.code511.com\/blog\/wp-json\/wp\/v2\/media?parent=180"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/deepquest.code511.com\/blog\/wp-json\/wp\/v2\/categories?post=180"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/deepquest.code511.com\/blog\/wp-json\/wp\/v2\/tags?post=180"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}