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Red Hat Linux Advisory: mc

Jan 21, 2004, 11:59 (0 Talkback[s])

Red Hat Security Advisory

Synopsis: Updated mc packages resolve buffer overflow vulnerability
Advisory ID: RHSA-2004:034-01
Issue date: 2004-01-19
Updated on: 2004-01-19
Product: Red Hat Linux
Keywords: mc buffer overflow vfs
Cross references:  
Obsoletes:  
CVE Names: CAN-2003-1023

1. Topic:

Updated mc packages that resolve a buffer overflow vulnerability are now available.

2. Relevant releases/architectures:

Red Hat Linux 9 - i386

3. Problem description:

Midnight Commander is a visual shell much like a file manager.

A buffer overflow has been found in Midnight Commander's virtual filesystem code. Specifically, a stack-based buffer overflow in vfs_s_resolve_symlink of vfs/direntry.c allows remote attackers to execute arbitrary code during symlink conversion.

Users of Midnight Commander should install these updated packages, which resolve this issue.

4. Solution:

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

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade. Only those RPMs which are currently installed will be updated. Those RPMs which are not installed but included in the list will not be updated. Note that you can also use wildcards (*.rpm) if your current directory only contains the desired RPMs.

Please note that this update is also available via Red Hat Network. Many people find this an easier way to apply updates. To use Red Hat Network, launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate RPMs being upgraded on your system.

If up2date fails to connect to Red Hat Network due to SSL Certificate Errors, you need to install a version of the up2date client with an updated certificate. The latest version of up2date is available from the Red Hat FTP site and may also be downloaded directly from the RHN website:

https://rhn.redhat.com/help/latest-up2date.pxt

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

113850 - CAN-2003-1023 mc stack overflow

6. RPMs required:

Red Hat Linux 9:

SRPMS:
ftp://updates.redhat.com/9/en/os/SRPMS/mc-4.6.0-7.9.src.rpm

i386:
ftp://updates.redhat.com/9/en/os/i386/mc-4.6.0-7.9.i386.rpm

7. Verification:

MD5 sum Package Name


a95b46e77c33aa44922b85fa87fd55e0 9/en/os/SRPMS/mc-4.6.0-7.9.src.rpm
ecce8798d9e33465f8aef6be1c0f7914 9/en/os/i386/mc-4.6.0-7.9.i386.rpm

These packages are GPG signed by Red Hat for security. Our key is available from https://www.redhat.com/security/keys.html

You can verify each package with the following command:

rpm --checksig -v <filename>

If you only wish to verify that each package has not been corrupted or tampered with, examine only the md5sum with the following command:

md5sum <filename>

8. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-1023

9. Contact:

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

Copyright 2003 Red Hat, Inc.