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TITLE:
Mac OS X pty Permission Security Issue

SECUNIA ADVISORY ID:
SA15224

VERIFY ADVISORY:
http://secunia.com/advisories/15224/

CRITICAL:
Less critical

IMPACT:
Exposure of sensitive information

WHERE:
Local system

OPERATING SYSTEM:
Apple Macintosh OS X
http://secunia.com/product/96/

DESCRIPTION:
Matt Johnston has discovered a security issue in Mac OS X, which can
be exploited by malicious, local users to gain knowledge of
potentially sensitive information.

The problem is that non-setuid root applications can't change the
permissions of ptys. This can be exploited to sniff other users' ttys
opened via non-setuid root applications (e.g. screen).

The security problem has been confirmed in version 10.3.9. Prior
versions may also be affected.

SOLUTION:
The security problem has reportedly been fixed in version 10.4.

PROVIDED AND/OR DISCOVERED BY:
Matt Johnston

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About:
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