DoctorDoom
02-21-2006, 06:30 PM
Description:
Michael Lehn has discovered a vulnerability in Mac OS X, which can be exploited by malicious people to compromise a user's system.
The vulnerability is caused due to an error in the processing of file association meta data (stored in the "__MACOSX" folder) in ZIP archives. This can be exploited to trick users into executing a malicious shell script renamed to a safe file extension stored in a ZIP archive.
This can also be exploited automatically via the Safari browser when visiting a malicious web site.
Secunia has constructed a test, which can be used to check if your system is affected by this issue:
http://secunia.com/mac_os_x_command_execution_vulnerability_test/
The vulnerability has been confirmed on a fully patched system with Safari 2.0.3 (417.8) and Mac OS X 10.4.5.
Solution:
The vulnerability can be mitigated by disabling the "Open safe files after downloading" option in Safari.
Do not open files in ZIP archives originating from untrusted sources.MACOSX ZIP Archive Shell Script Execution (http://secunia.com/advisories/18963/)
This vulnerability is deemed extremely critical by Secunia. It has not yet been patched.
Michael Lehn has discovered a vulnerability in Mac OS X, which can be exploited by malicious people to compromise a user's system.
The vulnerability is caused due to an error in the processing of file association meta data (stored in the "__MACOSX" folder) in ZIP archives. This can be exploited to trick users into executing a malicious shell script renamed to a safe file extension stored in a ZIP archive.
This can also be exploited automatically via the Safari browser when visiting a malicious web site.
Secunia has constructed a test, which can be used to check if your system is affected by this issue:
http://secunia.com/mac_os_x_command_execution_vulnerability_test/
The vulnerability has been confirmed on a fully patched system with Safari 2.0.3 (417.8) and Mac OS X 10.4.5.
Solution:
The vulnerability can be mitigated by disabling the "Open safe files after downloading" option in Safari.
Do not open files in ZIP archives originating from untrusted sources.MACOSX ZIP Archive Shell Script Execution (http://secunia.com/advisories/18963/)
This vulnerability is deemed extremely critical by Secunia. It has not yet been patched.