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Advisories for 4 vulnerabilities addressed by Apple SU 2005-005
From: David Remahl <vuln () remahl se>
Date: Tue, 3 May 2005 22:05:22 +0200

Hash: SHA1

I have published advisories for 4 security vulnerabilities in Mac OS X that were addressed by Apple Security Update 2005-005, released today. <http://docs.info.apple.com/article.html?artnum=301528>.

This email contains brief summaries of the problems. Full details can be found on my web site <http://remahl.se/david/vuln/>.

Description: help: URI handler execution of JavaScripts with known paths vulnerability
My name: DR004 <http://remahl.se/david/vuln/004/>
CVE: CAN-2005-1337 [yes, cool, isn't it ;-)]
Summary: The Help Viewer application allows JavaScript and is thus vulnerable to having scripts with arbitrary paths run with the privileges granted to file: protocol URIs. The files can be started with a URI on the form of help:///path/to/file.html. Combined with XMLHttpRequest's ability to disclose arbitrary files, this security bug becomes critcal.

Description: Invisible characters in applescript: URL protocol messaging vulnerability
My name: DR010 <http://remahl.se/david/vuln/010/>
CVE: CAN-2005-1331
Summary: URL Protocol Messaging is a technique used by Script Editor to facilitate sharing of AppleScripts between users. By clicking a link (for example in a web forum), a user can create a new Script Editor document automatically, with text from the query string of the URI. This avoids problems with copying text from the web or manually typing code snippets. However, the technique can be used to trick users into running dangerous code (with embedded control characters), since insufficient input validation is performed.

Description: Apple Terminal insufficient input sanitation of x-man- path: URIs vulnerability
My name: DR011 <http://remahl.se/david/vuln/011/>
CVE: CAN-2005-1342
Summary: Apple Terminal fails to properly sanitize the contents of x- man-path: URIs passed to it. This can lead to execution of arbitrary commands, aided by some of the escape sequences that Terminal supports.

Description: Mac OS X terminal emulators allow reading and writing of window title through escape sequences
My name: DR012 <http://remahl.se/david/vuln/012/>
CVE: CAN-2005-1341
Summary: Apple Terminal (often referred to as Terminal.app) and xterm which both ship with current versions of Mac OS X are vulnerable to a well-known type of attack when displaying untrusted content. Using escape sequences and social engineering attacks it is in some cases possible to trick the user into performing arbitrary commands.

I would like to acknowledge the willingness of Apple's Product Security team to cooperate with me in resolving these issues. CERT's assistance has also been helpful.

/ Regards, David Remahl
Version: GnuPG v1.4.1 (Darwin)

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