http://www.osvdb.org/25974
OSVDB ID: 25974
Disclosure Date: Jun 5, 2006

Description:

ActiveState ActivePerl contains a flaw that may allow a malicious user to gain access to unauthorized privileges. The issue is triggered when the attacker creates a malicious 'sitecustomize.pl' file in the 'site/lib' directory. This flaw may lead to a loss of integrity.

Technical Description:

This issue can only be exploited on Windows operating systems.

The issue is caused due to a combination of insecure use of the 'sitecustomize.pl' file and insecure default directory permissions granting Users group to create files in 'site/lib' directory. This issue allows local attackers to execute Perl script code with the privileges of other users executing ActivePerl.

Vulnerability Classification:

* Local/Shell Access Required
* Misconfiguration Problem
* Loss Of Integrity
* Exploit Available

Products:

* ActiveState ActivePerl 5.8.8.817

Solution:

Currently, there are no known upgrades or patches to correct this issue. It is possible to correct the flaw by implementing the following workarounds:

1. Create an empty sitecustomize.pl in the 'site/lib' directory.
2. Always run ActivePerl with the '-f' command line option.

In reply to ActivePerl sitecustomize.pl Local Privilege Escalation by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.