Apple has issued a security update for Mac OS X, which fixes multiple vulnerabilities.

1) The CUPS web interface allows users to perform certain actions via HTTP requests without performing any validity checks to verify the requests. This can be exploited to change CUPS settings if a logged-in administrative user visits a malicious web site.

2) A use-after-free error in CUPS when processing "get-printer-jobs" requests can be exploited to crash "cupsd".

NOTE: "cupsd" is automatically restarted after the crash occurs.

3) An uninitialised memory access error in the CUPS web interface when handling form variables can be exploited to disclose potentially sensitive "cupsd" memory.

4) The "Finder" implementation leaves the ownership of selected files unchanged when "Apply to enclosed items..." is selected in the "Get Info" window, resulting in unexpected permissions.

5) An error in Adobe Flash Player can be exploited to bypass domain sandbox limitations and perform unauthorized cross-domain requests.

For more information:
SA38547

6) An error in "Folder Manager" when unmounting disk images containing a malicious "Cleanup At Startup" directory can be exploited to delete arbitrary directories via symlink attacks.

7) An input sanitation error exists in "Help Viewer" when handling "help:" URLs. This can be exploited to execute arbitrary JavaScript code in the context of the local domain and disclose sensitive information or potentially execute arbitrary code.

8) An error in iChat when handling inline image transfers can be exploited to upload files to arbitrary locations on an AIM user's system via directory traversal attacks.

9) Multiple integer overflow errors in LibTIFF can be exploited to cause heap-based buffer overflows and potentially execute arbitrary code.

For more information:
SA40181

10) An unspecified error in ImageIO when processing MPEG2 movie files can be exploited to corrupt memory and potentially execute arbitrary code.

11) Multiple integer underflow errors in Kerberos can be exploited to corrupt heap memory and potentially execute arbitrary code.

For more information:
SA38080

12) An error in Kerberos can be exploited by malicious users to trigger a double-free and potentially execute arbitrary code.

For more information:
SA39420

13) An error in Kerberos when handling authorization data can be exploited to terminate an affected server.

14) An error in libcurl when handling compressed web content can potentially be exploited to cause a buffer overflow and execute arbitrary code.

For more information:
SA38427

15) The "NetAuthSysAgent" application performs certain operations without requiring authorization, allowing local users to potentially gain escalated privileges.

16) A format string error when handling "afp:", "cifs:", and "smb:" URLs can be exploited to potentially execute arbitrary code.

17) Open Directory establishes plain text connections when binding to network account servers without SSL support. This can be exploited to potentially execute arbitrary code via Man-in-the-Middle (MitM) attacks.

18) An error when handling local network printers having a Unicode character in the service name can be exploited to trigger a printing failure in certain applications.

19) An integer overflow error in the CUPS "cgtexttops" filter can be exploited to corrupt memory and potentially execute arbitrary code.

20) An error in the Ruby WEBrick HTTP server can be exploited to generate error pages interpreted as having an UTF-7 character set. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.

21) An error in the configuration of the included Samba distribution can be exploited to gain access to arbitrary files via symlink attacks.

This may be related to:
SA38454

22) Multiple errors in SquirrelMail can be exploited to conduct cross-site scripting, cross-site request forgery, session fixation, and phishing attacks.

For more information:
SA34627
SA35073

23) Wiki Server does not specify a character set when serving HTML documents. This can be exploited to execute arbitrary HTML and script code in a user's browser session by making a specially crafted post or comment.

Solution
Apply Security Update 2010-004 or update to version 10.6.4.
Further details available to Secunia VIM customers

Provided and/or discovered by
1) Adrian 'pagvac' Pastor of Gnucitizen
6, 8, 10, 15, 20) Reported by the vendor.

The vendor also credits:
1) Tim Starling
2) Tim Waugh
3) Luca Carettoni
4) Michi Ruepp of pianobakery.com
7) Clint Ruoho of Laconic Security
9) Kevin Finisterre of digitalmunition.com
16) Ilja van Sprundel of IOActive, and Chris Ries of Carnegie Mellon University Computing Services
18) Filipp Lepalaan of mcare Oy
19) regenrecht working with iDefense

Changelog
Further details available to Secunia VIM customers

Original Advisory
Apple:
http://support.apple.com/kb/HT4188

Gnucitizen:
http://www.gnucitizen.org/blog/apple-further-locks-down-cups-cve-2010-0540/

Other references
Further details available to Secunia VIM customers

Deep Links
Links available to Secunia VIM customers