[UNIX] ChangshinSoft ezTrans Server File Download Vulnerability
From: SecuriTeam (support_at_securiteam.com)
Date: 07/08/03
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To: list@securiteam.com Date: 8 Jul 2003 15:25:40 +0200
The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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ChangshinSoft ezTrans Server File Download Vulnerability
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SUMMARY
<http://cssoft.co.kr/jp/solutions01.html> ezTrans Server, used by famous
portal sites in Korea, is "a real-time Korean-to-Japanese and
Japanese-to-Korean translator made by ChangshinSoft". Due to inappropriate
input validation in a file download module of ezTrans Server, an attacker
can download any file that is accessible to web server's privileges.
DETAILS
Proof of Concept:
http://[victim
site]/question/crm/download.php?filename=../../../../../../../../../../../../etc/passwd
http://[victim
site]/download.php?filename=../../../../../../../../../../../../../etc/passwd
Workaround:
To minimize the effects of this vulnerability, we recommend following
workarounds.
1. Turn register_globals option in php.ini OFF. For detailed information,
refer to below sites.
2. Delete the vulnerable download.php and use static link to a file to
download inside your HTML source.
Vendor status:
2003-06-24 CSSoft notified.
2003-06-26 Second attempt to contact the vendor and system administrator.
2003-07-02 Third attempt to contact the vendor contact.
2003-07-04 Forth attempt to contact the vendor contact.
2003-07-04 Vendor replied.
2003-07-04 Last attempt to contact the vendor contact.
2003-07-04 Vendor issued a fix.
2003-07-08 Public disclosure.
ADDITIONAL INFORMATION
The information has been provided by <mailto:advisory@stgsecurity.com>
Jeremy Bae at STG Security SSR Team.
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