Bugtraq mailing list archives
mirror 2.9 hole
From: wise () TOMCAT RU (3APA3A)
Date: Tue, 28 Sep 1999 18:27:54 +0400
Hello BUGTRAQ () SECURITYFOCUS COM, mirror is a Perl script which is widely used for making copy of remote FTP site. It's included in FreeBSD packages. There are security holes, which allows overwrite local files from remote ftp site with permissions of the user who uses mirror. Then retrieving directory listing mirror doesn't check filename or directory name to contain ".." or "\" This allows to create or overwrite files in directory different from destination. To simply test this bug you can create " .." directory on your ftp site and mirror your site. Mirror will create temporary files in directory one level higher then specifyed. This way you couldn't overwrite some useful information, but this may be used, for example, to fill out / directory (if mirror is ran from root). But with putting little changes into you ftpd (for example making him change '\' to '/' on listings) you can force mirror to overwrite _any_ file with permissions of mirror user then he mirrors your ftp site. Tested with: $ mirror -v $Id: mirror.pl,v 2.9 1998/05/29 19:01:07 lmjm Exp lmjm $ /\_/\ { . . } |\ +--oQQo->{ ^ }<-----+ \ |úÄÅÓØ ÂÙÌ U õÞÅÎÙÊ ëÏÔ} +-------------o66o--+ / |/ ïÓÏÂÕÀ ÐÒÏÂÌÅÍÕ ÓÏÓÔÁ×ÌÑÅÔ ÁÌËÏÇÏÌÉÚÍ. (ìÅÍ)
Current thread:
- Kvirc bug Rodolfo Garcia Peas (Sep 24)
- Re: Kvirc bug Szymon Stefanek (Sep 27)
- mirror 2.9 hole 3APA3A (Sep 28)