BugTraq
PmWiki <= 2.2.34 (pagelist) Remote PHP Code Injection Vulnerability Nov 23 2011 03:06PM
n0b0d13s gmail com
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PmWiki <= 2.2.34 (pagelist) Remote PHP Code Injection Vulnerability
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author...............: Egidio Romano aka EgiX
mail.................: n0b0d13s[at]gmail[dot]com
software link........: http://www.pmwiki.org/
affected versions....: from 2.0.0 to 2.2.34

[-] vulnerable code in PageListSort() function defined into /scripts/pagelist.php

452. $code = '';
453. foreach($opt['=order'] as $o => $r) {
454. if (@$PageListSortCmp[$o])
455. $code .= "\$c = {$PageListSortCmp[$o]}; ";
456. else
457. $code .= "\$c = @strcasecmp(\$PCache[\$x]['$o'],\$PCache[\$y]['$o']); ";
458. $code .= "if (\$c) return $r\$c;\n";
459. }
460. StopWatch('PageListSort sort');
461. if ($code)
462. uasort($list,
463. create_function('$x,$y', "global \$PCache; $code return 0;"));
464. StopWatch('PageListSort end');

Input passed through 'order' parameter of 'pagelist' directive isn't properly sanitized before being used
in a call to create_function() at line 463. This can be exploited to inject and execute arbitrary PHP code.
Successful exploitation of this vulnerability might require authentication if the wiki isn't public writable.

[-] Disclosure timeline:

[09/11/2011] - Vulnerability discovered
[11/11/2011] - Issue reported to http://www.pmwiki.org/wiki/PITS/01271
[11/11/2011] - Version 2.2.35 released: http://www.pmwiki.org/wiki/PmWiki/ChangeLog#v2235
[12/11/2011] - CVE number requested
[15/11/2011] - Assigned CVE-2011-4453
[23/11/2011] - Public disclosure

[-] Proof of concept:

http://www.exploit-db.com/exploits/18149

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