SecurityTracker.com
    Home    |    View Topics    |    Search    |    Contact Us    |   

SecurityTracker
Archives


 


Category:   Application (File Transfer/Sharing)  >   LFTP Vendors:   Lukyanov, Alexander
(Red Hat Issues Fix) LFTP Content-Disposition Header Processing Flaw Lets Remote Users Overwrite Files on the Target System
SecurityTracker Alert ID:  1024273
SecurityTracker URL:  http://securitytracker.com/id/1024273
CVE Reference:   CVE-2010-2251   (Links to External Site)
Date:  Aug 3 2010
Impact:   Modification of system information, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 4.0.6
Description:   A vulnerability was reported in LFTP. A remote user can write or overwrite files on the target user's system.

A remote server can supply a specially crafted HTTP Content-Disposition header value to cause the requested file to be written (or overwritten) to arbitrary locations on the target user's system.

Hank Leininger and Solar Designer reported this vulnerability.

The original advisory is available at:

http://www.ocert.org/advisories/ocert-2010-001.html

[Editor's note: The vulnerability was originally disclosed in May 2010.]

Impact:   A remote user can write or overwrite files on the target user's system.
Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2010-0585.html

Vendor URL:  lftp.yar.ru/news.html (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  5

Message History:   This archive entry is a follow-up to the message listed below.
Aug 3 2010 LFTP Content-Disposition Header Processing Flaw Lets Remote Users Overwrite Files on the Target System



 Source Message Contents

Subject:  [RHSA-2010:0585-01] Moderate: lftp security update

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

=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: lftp security update
Advisory ID:       RHSA-2010:0585-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2010-0585.html
Issue date:        2010-08-02
CVE Names:         CVE-2010-2251 
=====================================================================

1. Summary:

An updated lftp package that fixes one security issue is now available for
Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate
security impact. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available from the CVE link in
the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

3. Description:

LFTP is a sophisticated file transfer program for the FTP and HTTP
protocols. Like Bash, it has job control and uses the Readline library for
input. It has bookmarks, built-in mirroring, and can transfer several files
in parallel. It is designed with reliability in mind.

It was discovered that lftp trusted the file name provided in the
Content-Disposition HTTP header. A malicious HTTP server could use this
flaw to write or overwrite files in the current working directory of a
victim running lftp, by sending a different file from what the victim
requested. (CVE-2010-2251)

To correct this flaw, the following changes were made to lftp: the
"xfer:clobber" option now defaults to "no", causing lftp to not overwrite
existing files, and a new option, "xfer:auto-rename", which defaults to
"no", has been introduced to control whether lftp should use
server-suggested file names. Refer to the "Settings" section of the lftp(1)
manual page for additional details on changing lftp settings.

All lftp users should upgrade to this updated package, which contains a
backported patch to correct this issue.

4. Solution:

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

5. Bugs fixed (http://bugzilla.redhat.com/):

591580 - CVE-2010-2251 lftp: multiple HTTP client download filename vulnerability [OCERT 2010-001]

6. Package List:

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/lftp-3.7.11-4.el5_5.3.src.rpm

i386:
lftp-3.7.11-4.el5_5.3.i386.rpm
lftp-debuginfo-3.7.11-4.el5_5.3.i386.rpm

x86_64:
lftp-3.7.11-4.el5_5.3.x86_64.rpm
lftp-debuginfo-3.7.11-4.el5_5.3.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/lftp-3.7.11-4.el5_5.3.src.rpm

i386:
lftp-3.7.11-4.el5_5.3.i386.rpm
lftp-debuginfo-3.7.11-4.el5_5.3.i386.rpm

ia64:
lftp-3.7.11-4.el5_5.3.ia64.rpm
lftp-debuginfo-3.7.11-4.el5_5.3.ia64.rpm

ppc:
lftp-3.7.11-4.el5_5.3.ppc.rpm
lftp-debuginfo-3.7.11-4.el5_5.3.ppc.rpm

s390x:
lftp-3.7.11-4.el5_5.3.s390x.rpm
lftp-debuginfo-3.7.11-4.el5_5.3.s390x.rpm

x86_64:
lftp-3.7.11-4.el5_5.3.x86_64.rpm
lftp-debuginfo-3.7.11-4.el5_5.3.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2010-2251.html
http://www.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2010 Red Hat, Inc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.4 (GNU/Linux)

iD8DBQFMVzDuXlSAg2UNWIIRAhrrAJwNjDY4mvdYFR1tP7FcuvBJ68bU/gCeMOMi
QbmSJ86CpEbV+fV15w//KYU=
=iQsF
-----END PGP SIGNATURE-----


-- 
Enterprise-watch-list mailing list
Enterprise-watch-list@redhat.com
https://www.redhat.com/mailman/listinfo/enterprise-watch-list
 
 


Go to the Top of This SecurityTracker Archive Page





Home   |    View Topics   |    Search   |    Contact Us

This web site uses cookies for web analytics. Learn More

Copyright 2021, SecurityGlobal.net LLC