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===================================================================== 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: 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: 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/
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