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Mac OS X Perl "$<" Privilege Dropping Security Issue Advisory Available in Danish 

Secunia Advisory: SA17922  
Release Date: 2005-12-13
Last Update: 2006-03-02

Critical:
Less critical
Impact: Security Bypass
Where: From remote
Solution Status: Vendor Patch

OS:Apple Macintosh OS X


CVE reference:CVE-2005-4217 (Secunia mirror)

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Description:
Jason Self has reported a security issue in Mac OS X, which can be exploited by malicious people to bypass certain security restrictions.

The security issue is caused due to the Perl binary included with Mac OS X not correctly dropping privileges when a Perl application uses the "$< = numeric_id;" statement to set its uid. The issue may be caused due to wrong compilation options being selected when compiling the Perl binary.

The security issue has been reported in the Perl binary included with Mac OS X Server 10.3.9. Prior versions may also be affected.

Note: The actual impact depends on how a Perl application is written to use the affected Perl functionality.

Solution:
Apply Security Update 2006-001.

Provided and/or discovered by:
Jason Self

Changelog:
2006-03-02: Updated "Solution" section. Added CVE reference.



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

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