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Category:   Application (File Transfer/Sharing)  >   Midnight Commander Vendors:   GNU Midnight Commander Project
(Red Hat Issues Fix for mc for RHEL) GNOME VFS Scripts May Let Users Execute Commands
SecurityTracker Alert ID:  1011295
SecurityTracker URL:  http://securitytracker.com/id/1011295
CVE Reference:   CVE-2004-0494   (Links to External Site)
Date:  Sep 15 2004
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   Some vulnerabilities were reported in several GNOME VFS extfs backend scripts. A remote user may be able to cause commands to be executed on the target system. Midnight Commander is affected.

Red Hat reported that a remote user can create a specially crafted URL that, when opened by a target user with gnome-vfs, will execute commands with the privileges of the target user.

Some of the extfs scripts shipped with gnome-vfs (and mc) do not properly validate user-supplied input.

Impact:   A remote user can cause commands to be executed.
Solution:   Red Hat has released a fix for Midnight Commander, which is affected by the gnome-vfs vulnerability.

Red Hat Enterprise Linux AS (Advanced Server) version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/mc-4.5.51-36.4.src.rpm
afec2c565d6a6ddef751653eebaa3ad6 mc-4.5.51-36.4.src.rpm

i386:
10f69a32fd981ffcb2c018e070ca9b62 mc-4.5.51-36.4.i386.rpm

ia64:
662118226d4084bbe6e67f19f7918af1 mc-4.5.51-36.4.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AW/en/os/SRPMS/mc-4.5.51-36.4.src.rpm
afec2c565d6a6ddef751653eebaa3ad6 mc-4.5.51-36.4.src.rpm

ia64:
662118226d4084bbe6e67f19f7918af1 mc-4.5.51-36.4.ia64.rpm

Red Hat Enterprise Linux WS version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1WS/en/os/SRPMS/mc-4.5.51-36.4.src.rpm
afec2c565d6a6ddef751653eebaa3ad6 mc-4.5.51-36.4.src.rpm

i386:
10f69a32fd981ffcb2c018e070ca9b62 mc-4.5.51-36.4.i386.rpm

Cause:   Input validation error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  2.1

Message History:   This archive entry is a follow-up to the message listed below.
Aug 4 2004 GNOME VFS Scripts May Let Users Execute Commands



 Source Message Contents

Subject:  [RHSA-2004:464-01] Updated mc package resolves security


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

- ---------------------------------------------------------------------
                   Red Hat Security Advisory

Synopsis:          Updated mc package resolves security vulnerabilities
Advisory ID:       RHSA-2004:464-01
Issue date:        2004-09-15
Updated on:        2004-09-15
Product:           Red Hat Enterprise Linux
CVE Names:         CAN-2004-0494
- ---------------------------------------------------------------------

1. Summary:

An updated mc package that resolves several shell escape security issues is
now available.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1 - i386, ia64
Red Hat Linux Advanced Workstation 2.1 - ia64
Red Hat Enterprise Linux WS version 2.1 - i386

3. Problem description:

Midnight Commander (mc) is a visual shell much like a file manager.

Shell escape bugs have been discovered in several of the mc vfs backend
scripts. An attacker who is able to influence a victim to open a
specially-crafted URI using mc could execute arbitrary commands as the
victim. The Common Vulnerabilities and Exposures project (cve.mitre.org) has
assigned the name CAN-2004-0494 to this issue.

Users of mc should upgrade to this updated package which contains
backported patches and is not vulnerable to this issue.

4. Solution:

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.  Use Red Hat
Network to download and update your packages.  To launch the Red Hat
Update Agent, use the following command:

    up2date

For information on how to install packages manually, refer to the
following Web page for the System Administration or Customization
guide specific to your system:

    http://www.redhat.com/docs/manuals/enterprise/

5. Bug IDs fixed (http://bugzilla.redhat.com/ for more info):

127974 - CAN-2004-0494 extfs vfs vulnerability in mc

6. RPMs required:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/mc-4.5.51-36.4.src.rpm
afec2c565d6a6ddef751653eebaa3ad6  mc-4.5.51-36.4.src.rpm

i386:
10f69a32fd981ffcb2c018e070ca9b62  mc-4.5.51-36.4.i386.rpm

ia64:
662118226d4084bbe6e67f19f7918af1  mc-4.5.51-36.4.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AW/en/os/SRPMS/mc-4.5.51-36.4.src.rpm
afec2c565d6a6ddef751653eebaa3ad6  mc-4.5.51-36.4.src.rpm

ia64:
662118226d4084bbe6e67f19f7918af1  mc-4.5.51-36.4.ia64.rpm

Red Hat Enterprise Linux WS version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1WS/en/os/SRPMS/mc-4.5.51-36.4.src.rpm
afec2c565d6a6ddef751653eebaa3ad6  mc-4.5.51-36.4.src.rpm

i386:
10f69a32fd981ffcb2c018e070ca9b62  mc-4.5.51-36.4.i386.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.html#package

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0494

8. Contact:

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

Copyright 2004 Red Hat, Inc.
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