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TITLE:
PerlSoft Gästebuch "loginname1" Code Execution Vulnerability

SECUNIA ADVISORY ID:
SA33772

VERIFY ADVISORY:
http://secunia.com/advisories/33772/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
PerlSoft Gästebuch 1.x
http://secunia.com/advisories/product/21288/

DESCRIPTION:
Perforin has reported a vulnerability in PerlSoft Gästebuch, which
can be exploited by malicious users to compromise a vulnerable
system.

Input passed to the "loginname1" parameter in admincenter.cgi is not
properly sanitised before being written to the "adminuserdata.cgi"
file. This can be exploited to execute arbitrary commands by saving a
user name containing Perl code.

Successful exploitation of this vulnerability requires administrative
access.

This vulnerability is reported in version 1.7b. Other versions may
also be affected.

SOLUTION:
Grant only trusted users access to the administrative interface.

PROVIDED AND/OR DISCOVERED BY:
Perforin

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