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Category:   Application (File Transfer/Sharing)  >   LFTP Vendors:   Lukyanov, Alexander
(Mandrake Issues Fix) LFTP Buffer Overflow in Processing HTTP Responses May Allow Remote Code Execution
SecurityTracker Alert ID:  1008482
SecurityTracker URL:  http://securitytracker.com/id/1008482
CVE Reference:   CVE-2003-0963   (Links to External Site)
Date:  Dec 16 2003
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 2.6.10
Description:   A buffer overflow vulnerability was reported in LFTP. A remote server may be able to cause arbitrary code to be executed on a connected client.

It is reported that LFTP contains buffer overflows that can be triggered by a remote user. The flaws reside in the try_netscape_proxy() and try_squid_eplf() functions in 'HttpDir.cc'. A remote user operating a web server can reportedly create a specially crafted directory so that when a target user connects to the web server (secure or non-secure) with the LFTP client and issues the "ls" or "rels" command, arbitrary code will be executed on the target user's system.

Ulf Harnhammar is credited with discovering the bugs.

Impact:   A remote server can cause arbitrary code to be executed on the target user's LFTP client when the client connects to the server and issues an "ls" or "rels" command.
Solution:   Mandrake has released a fix.

Updated Packages:

Corporate Server 2.1:
701dc411181f76222b9da521ecb918ea corporate/2.1/RPMS/lftp-2.6.0-1.1.C21mdk.i586.rpm
645a7dc1cb448119e396caa811f166f4 corporate/2.1/SRPMS/lftp-2.6.0-1.1.C21mdk.src.rpm

Corporate Server 2.1/x86_64:
4fb0dba34a2bf34eb308302a3c3a539a x86_64/corporate/2.1/RPMS/lftp-2.6.0-1.1.C21mdk.x86_64.rpm
645a7dc1cb448119e396caa811f166f4 x86_64/corporate/2.1/SRPMS/lftp-2.6.0-1.1.C21mdk.src.rpm

Mandrake Linux 9.0:
d25f45fc551ba6dff648b5606cf28f50 9.0/RPMS/lftp-2.6.0-1.1.90mdk.i586.rpm
d61a1547159595711598777db73bab3e 9.0/SRPMS/lftp-2.6.0-1.1.90mdk.src.rpm

Mandrake Linux 9.1:
c4b66d9cd6da996a8b75f8e64f53453f 9.1/RPMS/lftp-2.6.4-2.1.91mdk.i586.rpm
025d21cc6a3e309760ffe36d51fc091a 9.1/SRPMS/lftp-2.6.4-2.1.91mdk.src.rpm

Mandrake Linux 9.1/PPC:
2f282a7fa70ab9d0a8e556ecaf95bfd9 ppc/9.1/RPMS/lftp-2.6.4-2.1.91mdk.ppc.rpm
025d21cc6a3e309760ffe36d51fc091a ppc/9.1/SRPMS/lftp-2.6.4-2.1.91mdk.src.rpm

Mandrake Linux 9.2:
c24d53a5c4566d0ef9155fe427347fa8 9.2/RPMS/lftp-2.6.6-2.1.92mdk.i586.rpm
38cd1ea07bd0e2cbfbfaaf8b84d505e3 9.2/SRPMS/lftp-2.6.6-2.1.92mdk.src.rpm

Mandrake Linux 9.2/AMD64:
72cc8612325d8e985c3bbe40fa34fd8b amd64/9.2/RPMS/lftp-2.6.6-2.1.92mdk.amd64.rpm
38cd1ea07bd0e2cbfbfaaf8b84d505e3 amd64/9.2/SRPMS/lftp-2.6.6-2.1.92mdk.src.rpm

Vendor URL:  lftp.yar.ru/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Mandriva/Mandrake)
Underlying OS Comments:  9.0, 9.1, 9.2, Corporate Server 2.1

Message History:   This archive entry is a follow-up to the message listed below.
Dec 14 2003 LFTP Buffer Overflow in Processing HTTP Responses May Allow Remote Code Execution



 Source Message Contents

Subject:  MDKSA-2003:116 - Updated lftp packages fix buffer overflow vulnerability


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

 _______________________________________________________________________

                Mandrake Linux Security Update Advisory
 _______________________________________________________________________

 Package name:           lftp
 Advisory ID:            MDKSA-2003:116
 Date:                   December 15th, 2003

 Affected versions:	 9.0, 9.1, 9.2, Corporate Server 2.1
 ______________________________________________________________________

 Problem Description:

 A buffer overflow vulnerability was discovered by Ulf Harnhammar in
 the lftp FTP client when connecting to a web server using HTTP or
 HTTPS and using the "ls" or "rels" command on specially prepared
 directory.  This vulnerability exists in lftp versions 2.3.0 through
 2.6.9 and is corrected upstream in 2.6.10.
 
 The updated packages are patched to protect against this problem.
 ______________________________________________________________________

 Updated Packages:
  
 Corporate Server 2.1:
 701dc411181f76222b9da521ecb918ea  corporate/2.1/RPMS/lftp-2.6.0-1.1.C21mdk.i586.rpm
 645a7dc1cb448119e396caa811f166f4  corporate/2.1/SRPMS/lftp-2.6.0-1.1.C21mdk.src.rpm

 Corporate Server 2.1/x86_64:
 4fb0dba34a2bf34eb308302a3c3a539a  x86_64/corporate/2.1/RPMS/lftp-2.6.0-1.1.C21mdk.x86_64.rpm
 645a7dc1cb448119e396caa811f166f4  x86_64/corporate/2.1/SRPMS/lftp-2.6.0-1.1.C21mdk.src.rpm

 Mandrake Linux 9.0:
 d25f45fc551ba6dff648b5606cf28f50  9.0/RPMS/lftp-2.6.0-1.1.90mdk.i586.rpm
 d61a1547159595711598777db73bab3e  9.0/SRPMS/lftp-2.6.0-1.1.90mdk.src.rpm

 Mandrake Linux 9.1:
 c4b66d9cd6da996a8b75f8e64f53453f  9.1/RPMS/lftp-2.6.4-2.1.91mdk.i586.rpm
 025d21cc6a3e309760ffe36d51fc091a  9.1/SRPMS/lftp-2.6.4-2.1.91mdk.src.rpm

 Mandrake Linux 9.1/PPC:
 2f282a7fa70ab9d0a8e556ecaf95bfd9  ppc/9.1/RPMS/lftp-2.6.4-2.1.91mdk.ppc.rpm
 025d21cc6a3e309760ffe36d51fc091a  ppc/9.1/SRPMS/lftp-2.6.4-2.1.91mdk.src.rpm

 Mandrake Linux 9.2:
 c24d53a5c4566d0ef9155fe427347fa8  9.2/RPMS/lftp-2.6.6-2.1.92mdk.i586.rpm
 38cd1ea07bd0e2cbfbfaaf8b84d505e3  9.2/SRPMS/lftp-2.6.6-2.1.92mdk.src.rpm

 Mandrake Linux 9.2/AMD64:
 72cc8612325d8e985c3bbe40fa34fd8b  amd64/9.2/RPMS/lftp-2.6.6-2.1.92mdk.amd64.rpm
 38cd1ea07bd0e2cbfbfaaf8b84d505e3  amd64/9.2/SRPMS/lftp-2.6.6-2.1.92mdk.src.rpm
 _______________________________________________________________________

 To upgrade automatically use MandrakeUpdate or urpmi.  The verification
 of md5 checksums and GPG signatures is performed automatically for you.

 A list of FTP mirrors can be obtained from:

  http://www.mandrakesecure.net/en/ftp.php

 All packages are signed by MandrakeSoft for security.  You can obtain
 the GPG public key of the Mandrake Linux Security Team by executing:

  gpg --recv-keys --keyserver www.mandrakesecure.net 0x22458A98

 Please be aware that sometimes it takes the mirrors a few hours to
 update.

 You can view other update advisories for Mandrake Linux at:

  http://www.mandrakesecure.net/en/advisories/

 MandrakeSoft has several security-related mailing list services that
 anyone can subscribe to.  Information on these lists can be obtained by
 visiting:

  http://www.mandrakesecure.net/en/mlist.php

 If you want to report vulnerabilities, please contact

  security_linux-mandrake.com

 Type Bits/KeyID     Date       User ID
 pub  1024D/22458A98 2000-07-10 Linux Mandrake Security Team
  <security linux-mandrake.com>
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-----END PGP SIGNATURE-----

 
 


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