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Category:   Application (File Transfer/Sharing)  >   gFTP Vendors:   Masney, Brian
(Debian Releases Fix) Re: gFTP Client May Allow Remote FTP Servers to Cause the FTP Client to Execute Arbitrary Code on the User's Host
SecurityTracker Alert ID:  1001488
SecurityTracker URL:
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  May 8 2001
Impact:   Denial of service via network, Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 2.0.8
Description:   It is reported that the gFTP client contains a vulnerability that may allow a remote server to cause arbitrary code to be executed on the client user's host.

The software reportedly contains a format string security problem in the logging of ftp and http responses. This apparently allows malicious ftp servers to potentially execute code on the gFTP user's system. No further details are available.

Impact:   A malicious ftp server could potentially execute code on the gFTP user's system when the user connects to the server. The malicious server could also cause the gFTP client to crash.
Solution:   Debian has released a fix. For details, see Debian Security Advisory DSA-055-1, contained in the Source Message.
Vendor URL: (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Debian)

Message History:   This archive entry is a follow-up to the message listed below.
Apr 28 2001 gFTP Client May Allow Remote FTP Servers to Cause the FTP Client to Execute Arbitrary Code on the User's Host

 Source Message Contents

Subject:  [SECURITY] [DSA-055-1] gftp remote exploit


- ------------------------------------------------------------------------
Debian Security Advisory DSA-055-1                                  Wichert Akkerman
May  8, 2001
- ------------------------------------------------------------------------

Package        : gftp
Problem type   : printf format attack
Debian-specific: no

The gftp package as distributed with Debian GNU/Linux 2.2 has a problem
in its logging code: it logged data received from the network but it did
not protect itself from printf format attacks. An attacker can use this
by making a FTP server return special responses that exploit this.

This has been fixed in version 2.0.6a-3.1, and we recommend that you
upgrade your gftp package.

wget url
        will fetch the file for you
dpkg -i file.deb
        will install the referenced file.

Debian GNU/Linux 2.2 alias potato
- ---------------------------------

  Potato was released for alpha, arm, i386, m68k, powerpc and sparc.

  Source archives:
      MD5 checksum: 23df5107a21eaa36b3dcc50367bd3b46
      MD5 checksum: b99704d17c10b1f2bbbb80d430b55d21
      MD5 checksum: 8eba39ab947712b46756b4e014b72e8c

  Alpha architecture:
      MD5 checksum: 7df9efccb67296eb2df1e070e66add80

  ARM architecture:
      MD5 checksum: 2d701b8c6c4f5e05ca8664a65cf2e8d3

  Intel ia32 architecture:
      MD5 checksum: 71b547eec5c5e24f9dca56882b5fbf8a

  Motorola 680x0 architecture:
      MD5 checksum: 4f824249dd40ed70ba3f373cbad1a790

  PowerPC architecture:
      MD5 checksum: 12d5e7b0b433d9eeefef48c31786ee83

  Sun Sparc architecture:
      MD5 checksum: c0de4c7a87d2dbb153bc6a67530ac0cc

  These packages will be moved into the stable distribution on its next

For not yet released architectures please refer to the appropriate
directory$arch/ .

- -- 
- ----------------------------------------------------------------------------
apt-get: deb stable/updates main
dpkg-ftp: dists/stable/updates/main
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