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Category:   Application (File Transfer/Sharing)  >   FTP (Generic) Vendors:   FreeBSD, HPE, NetBSD, OpenBSD, SGI (Silicon Graphics), Sun
(Sun Issues Fix) Several FTP Server Implementations Allow Remote Users to Obtain Root-Level Privileges on the Server
SecurityTracker Alert ID:  1002152
SecurityTracker URL:  http://securitytracker.com/id/1002152
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Aug 7 2001
Impact:   Execution of arbitrary code via local system, Execution of arbitrary code via network, Root access via local system, Root access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   Network Associates COVERT Labs issued an advisory (COVERT-2001-02) for multiple FTP server implementations. These implementations allow remote and local users to obtain root-level privileges on the server.

In general, if the remote user has the ability to create directories on the FTP server, these vulnerabilities can be exploited. The vulnerabilities are related to the use of the glob() function.

In some cases, user input that has been expanded by glob() can exceed expected boundary lengths and trigger a buffer overflow. In other cases, the glob() function contains other buffer overflows.

Network Associates reports that the following operating systems have been confirmed to contain vulnerable FTP daemons:

FreeBSD 4.2, OpenBSD 2.8, NetBSD 1.5, IRIX 6.5.x, HPUX 11, Solaris 8

For details on the exact nature of the vulnerabilities, see the source message or refer to the COVERT Labs Advisory:

http://www.pgp.com/research/covert/advisories/048.asp

Impact:   A remote or local user can obtain root privileges on the FTP server.
Solution:   The vendor has released a fix. See the Source Message for the vendor's advisory containing directions on how to obtain the appropriate fix.
Vendor URL:  sunsolve.sun.com/security (Links to External Site)
Cause:   Boundary error
Underlying OS:  UNIX (Solaris - SunOS)

Message History:   This archive entry is a follow-up to the message listed below.
Apr 10 2001 Several FTP Server Implementations Allow Remote Users to Obtain Root-Level Privileges on the Server



 Source Message Contents

Subject:  Sun Security Bulletin #00205


-----BEGIN PGP SIGNED MESSAGE-----

________________________________________________________________________________
                    Sun Microsystems, Inc. Security Bulletin

Bulletin Number:          #00205
Date:                     August 2, 2001
Cross-Ref:                CERT Advisory CA-2001-07
Title:                    in.ftpd
________________________________________________________________________________

The information contained in this Security Bulletin is provided "AS IS."
Sun makes no warranties of any kind whatsoever with respect to the information
contained in this Security Bulletin. ALL EXPRESS OR IMPLIED CONDITIONS,
REPRESENTATIONS AND WARRANTIES, INCLUDING ANY WARRANTY OF NON-INFRINGEMENT OR
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE
HEREBY DISCLAIMED AND EXCLUDED TO THE EXTENT ALLOWED BY APPLICABLE LAW.

IN NO EVENT WILL SUN MICROSYSTEMS, INC. BE LIABLE FOR ANY LOST REVENUE,
PROFIT OR DATA, OR FOR DIRECT, SPECIAL, INDIRECT, CONSEQUENTIAL, INCIDENTAL
OR PUNITIVE DAMAGES HOWEVER CAUSED AND REGARDLESS OF ANY THEORY OF LIABILITY
ARISING OUT OF THE USE OF OR INABILITY TO USE THE INFORMATION CONTAINED IN
THIS SECURITY BULLETIN, EVEN IF SUN MICROSYSTEMS, INC. HAS BEEN ADVISED OF
THE POSSIBILITY OF SUCH DAMAGES.

If any of the above provisions are held to be in violation of applicable law,
void, or unenforceable in any jurisdiction, then such provisions are waived
to the extent necessary for this disclaimer to be otherwise enforceable in
such jurisdiction.
________________________________________________________________________________

1.  Bulletins Topics

    Sun announces the release of patches for Solaris(tm) 8, 7, 2.6,
    2.5.1, and 2.5 (SunOS(tm) 5.8, 5.7, 5.6, 5.5.1, and 5.5) which
    relate to an in.ftpd vulnerability reported in CERT CA-2001-07.

    Sun recommends that you install the patches listed in section 4
    immediately on systems running SunOS 5.8, 5.7, 5.6, 5.5.1, and 
    5.5 which use in.ftpd.

2.  Who is Affected

    Vulnerable:                SunOS 5.8, 5.8_x86, 5.7, 5.7_x86, 5.6,
                               5.6_x86, 5.5.1, 5.5.1_x86, 5.5, 5.5_x86

3.  Understanding the Vulnerability

    The in.ftpd daemon is the Internet File Transfer Protocol (FTP)
    server process.  The FTP server process interprets file names
    according to the "globbing" conventions used by sh(1).  CERT
    Advisory CA-2001-07 describes a vulnerability in some of the
    "globbing" routines which incorrectly manage buffers and may
    allow remote users to execute arbitrary code on the FTP server.
    The issue was discovered by COVERT Labs at PGP Security who
    describe their findings at:

    http://www.pgp.com/research/covert/advisories/048.asp

    CERT Advisory CA-2001-07 is available from:

    http://www.cert.org/advisories/CA-2001-07.html

4.  List of Patches

    The following patches are available in relation to the above problems.

    OS Version               Patch ID
    __________               _________
    SunOS 5.8                111606-01
    SunOS 5.8_x86            111607-01
    SunOS 5.7                110646-02
    SunOS 5.7_x86            110647-02
    SunOS 5.6                106301-03
    SunOS 5.6_x86            106302-03
    SunOS 5.5.1              103603-16
    SunOS 5.5.1_x86          103604-16
    SunOS 5.5                103577-12
    SunOS 5.5_x86            103578-12
_______________________________________________________________________________

APPENDICES

A.  Patches listed in this bulletin are available to all Sun customers at:

    http://sunsolve.sun.com/securitypatch

B.  Checksums for the patches listed in this bulletin are available at:

    ftp://sunsolve.sun.com/pub/patches/CHECKSUMS

C.  Sun security bulletins are available at:

    http://sunsolve.sun.com/security

D.  Sun Security Coordination Team's PGP key is available at:

    http://sunsolve.sun.com/pgpkey.txt

E.  To report or inquire about a security problem with Sun software, contact
    one or more of the following:

        - Your local Sun answer centers
        - Your representative computer security response team, such as CERT
        - Sun Security Coordination Team. Send email to:

        security-alert@sun.com

F.  To receive information or subscribe to our CWS (Customer Warning System)
    mailing list, send email to:

        security-alert@sun.com

    with a subject line (not body) containing one of the following commands:

        Command         Information Returned/Action Taken
        _______         _________________________________

        help            An explanation of how to get information

        key             Sun Security Coordination Team's PGP key

        list            A list of current security topics

        query [topic]   The email is treated as an inquiry and is forwarded to
                        the Security Coordination Team

        report [topic]  The email is treated as a security report and is
                        forwarded to the Security Coordination Team. Please
                        encrypt sensitive mail using Sun Security Coordination
                        Team's PGP key

        send topic      A short status summary or bulletin. For example, to
                        retrieve a Security Bulletin #00138, supply the
                        following in the subject line (not body):

                                send #138

        subscribe       Sender is added to our mailing list.  To subscribe,
                        supply the following in the subject line (not body):

                                subscribe cws your-email-address

                        Note that your-email-address should be substituted
                        by your email address.

        unsubscribe     Sender is removed from the CWS mailing list.
________________________________________________________________________________

Copyright 2000 Sun Microsystems, Inc. All rights reserved. Sun,
Sun Microsystems, Solaris and SunOS are trademarks or registered trademarks
of Sun Microsystems, Inc. in the United States and other countries. This
Security Bulletin may be reproduced and distributed, provided that this
Security Bulletin is not modified in any way and is attributed to
Sun Microsystems, Inc. and provided that such reproduction and distribution
is performed for non-commercial purposes.

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