Re: *ALERT* BID 3581: Wu-Ftpd File Globbing Heap Corruption Vulnerability

From: Andre Oppermann (oppermannat_private)
Date: Wed Nov 28 2001 - 16:00:03 PST

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    The FreeBSD ftpd on at least FreeBSD 4.4 and FreeBSD 5.0-current does
    not crash but simply provides a normal 'ls' output even though script0r
    sees his Linux port of the (Open)BSD ftpd crashing.
    
    -- 
    Andre
    
    
    script0r wrote:
    > 
    > >
    > > --------------------------------------------------------------------------
    > -
    > >                              Security Alert
    > >
    > > Subject:      Wu-Ftpd File Globbing Heap Corruption Vulnerability
    > > BUGTRAQ ID:   3581                   CVE ID:         CVE-MAP-NOMATCH
    > > Published:    Nov 27, 2001           Updated:        Nov 28, 2001
    > > 01:12:56
    > >
    > > Remote:       Yes                    Local:          No
    > > Availability: Always                 Authentication: Not Required
    > > Credibility:  Vendor Confirmed       Ease:           No Exploit
    > > Available Class:        Failure to Handle Exceptional Conditions
    > >
    > > Impact:   10.0           Severity: 10.0            Urgency:  8.2
    > >
    > > Last Change:  Initial analysis.
    > > --------------------------------------------------------------------------
    > 
    > I am running the a linux port of the bsd ftpd and it might be vulnerable to
    > a similar attack,
    > 
    > ftp localhost
    > Connected to localhost.
    > 220 playlandFTP server (Version 6.5/OpenBSD, linux port 0.3.3) ready.
    > Name (localhost:user): ftp
    > 331 Guest login ok, type your name as password.
    > Password:
    > 230 Guest login ok, access restrictions apply.
    > Remote system type is UNIX.
    > Using binary mode to transfer files.
    > ftp> ls ~{
    > 200 PORT command successful.
    > 421 Service not available, remote server has closed connection
    > 
    > in inetd I find an error stating that the ftpd process has died unexpectedly
    > 
    > Nov 28 14:21:28 playland inetd[82]: pid 16341: exit signal 11
    



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