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Security Advisory Moderate: lftp security update

Advisory: RHSA-2010:0585-1
Type: Security Advisory
Severity: Moderate
Issued on: 2010-08-02
Last updated on: 2010-08-02
Affected Products: Red Hat Enterprise Linux (v. 5 server)
Red Hat Enterprise Linux Desktop (v. 5 client)
CVEs (cve.mitre.org): CVE-2010-2251

Details

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.

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.


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

Updated packages

Red Hat Enterprise Linux (v. 5 server)

IA-32:
lftp-3.7.11-4.el5_5.3.i386.rpm
File outdated by:  RHBA-2013:0071
    MD5: 296c398000c1130de126f4bed79a3220
SHA-256: 66ed6e65c53aadceab813f0b5483b98df97f7a4dcc4c0800a9324fe896556583
 
IA-64:
lftp-3.7.11-4.el5_5.3.ia64.rpm
File outdated by:  RHBA-2013:0071
    MD5: 45c391199a649a28656234120c89f1f1
SHA-256: 69508b6c2b5b74a8f998813d8273a04fee96a1df9d83c60f63f00b217cd7f0d8
 
PPC:
lftp-3.7.11-4.el5_5.3.ppc.rpm
File outdated by:  RHBA-2013:0071
    MD5: 133190f55da0cb83fc65041560612965
SHA-256: 680bd464aceb5cea4384281166f52b255587b8087ca38d1a5fba99934a13994b
 
s390x:
lftp-3.7.11-4.el5_5.3.s390x.rpm
File outdated by:  RHBA-2013:0071
    MD5: 162d192e94606676bf2ea4578f0b5cf9
SHA-256: bfd600c0a5f8eb54518bcad69f9755ff7cbaa377e12ed2aa791d9656e92603ad
 
x86_64:
lftp-3.7.11-4.el5_5.3.x86_64.rpm
File outdated by:  RHBA-2013:0071
    MD5: 81bb8c209b0ebae61fd5920d23fd4d74
SHA-256: 1e9fe094006ffdde666c491558c1be6e6dbbe052f2a07ca71818c2cce7729d71
 
Red Hat Enterprise Linux Desktop (v. 5 client)

IA-32:
lftp-3.7.11-4.el5_5.3.i386.rpm
File outdated by:  RHBA-2013:0071
    MD5: 296c398000c1130de126f4bed79a3220
SHA-256: 66ed6e65c53aadceab813f0b5483b98df97f7a4dcc4c0800a9324fe896556583
 
x86_64:
lftp-3.7.11-4.el5_5.3.x86_64.rpm
File outdated by:  RHBA-2013:0071
    MD5: 81bb8c209b0ebae61fd5920d23fd4d74
SHA-256: 1e9fe094006ffdde666c491558c1be6e6dbbe052f2a07ca71818c2cce7729d71
 
(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

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


References



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

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