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Category:   Application (Multimedia)  >   Icecast Vendors:   Icecast.org
(Red Hat Issues Fix) Icecast MP3 Streaming Server Buffer Overflow Lets Remote Users Execute Arbitrary Code on the Server, Usually With Root Level Privileges
SecurityTracker Alert ID:  1004162
SecurityTracker URL:  http://securitytracker.com/id/1004162
CVE Reference:   CVE-2002-0177   (Links to External Site)
Date:  Apr 26 2002
Impact:   Execution of arbitrary code via network, Root access via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 1.3.11 and prior versions
Description:   A vulnerability was reported in the Icecast audio streaming server. A remote user can execute arbitrary code on the server, generally with root level permissions.

A remote user can reportedly trigger a buffer overflow in the Icecast server. This will apparently yield root level access if the Icecast server is run as root, as many users apparently do. Otherwise, this will apparently yield user-level access.

A remote user can create a specially crafted URL to trigger the overflow, which reportedly exists in the client_login() function. According to the report, another buffer overflow may also exist in the icecast extract_vars() function, as well as some libavl routines, but these have not been confirmed.

Demonstration exploit code is provided in the Source Message [it is Base64 encoded].

The vendor has reportedly been notified.

Impact:   A remote user can execute arbitrary code on the server with the privileges of the Icecast server.
Solution:   The vendor has released a fix for Red Hat Powertools 7.0 and 7.1.

Red Hat Powertools 7.0:

SRPMS:
ftp://updates.redhat.com/7.0/en/powertools/SRPMS/icecast-1.3.12-1.src.rpm

alpha:
ftp://updates.redhat.com/7.0/en/powertools/alpha/icecast-1.3.12-1.alpha.rpm

i386:
ftp://updates.redhat.com/7.0/en/powertools/i386/icecast-1.3.12-1.i386.rpm

Red Hat Powertools 7.1:

SRPMS:
ftp://updates.redhat.com/7.1/en/powertools/SRPMS/icecast-1.3.12-1.src.rpm

alpha:
ftp://updates.redhat.com/7.1/en/powertools/alpha/icecast-1.3.12-1.alpha.rpm

i386:
ftp://updates.redhat.com/7.1/en/powertools/i386/icecast-1.3.12-1.i386.rpm

The verification checksums are:

MD5 sum Package Name
--------------------------------------------------------------------------
baaf27a3908bfa01191452e3f4fc9c08 7.0/en/powertools/SRPMS/icecast-1.3.12-1.src.rpm
135f94bf2781ffe7ca1d5d19a4fc7e6a 7.0/en/powertools/alpha/icecast-1.3.12-1.alpha.rpm
50d6273850643032246b3a98d03ef61d 7.0/en/powertools/i386/icecast-1.3.12-1.i386.rpm
baaf27a3908bfa01191452e3f4fc9c08 7.1/en/powertools/SRPMS/icecast-1.3.12-1.src.rpm
135f94bf2781ffe7ca1d5d19a4fc7e6a 7.1/en/powertools/alpha/icecast-1.3.12-1.alpha.rpm
50d6273850643032246b3a98d03ef61d 7.1/en/powertools/i386/icecast-1.3.12-1.i386.rpm

Vendor URL:  www.icecast.org/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Red Hat Linux)
Underlying OS Comments:  Powertools 7.0, 7.1

Message History:   This archive entry is a follow-up to the message listed below.
Apr 3 2002 Icecast MP3 Streaming Server Buffer Overflow Lets Remote Users Execute Arbitrary Code on the Server, Usually With Root Level Privileges



 Source Message Contents

Subject:  [RHSA-2002:063-05] Updated icecast packages are available


---------------------------------------------------------------------
                   Red Hat, Inc. Red Hat Security Advisory

Synopsis:          Updated icecast packages are available
Advisory ID:       RHSA-2002:063-05
Issue date:        2002-04-11
Updated on:        2002-04-24
Product:           Red Hat Powertools
Keywords:          icecast buffer overflow DoS long get request
Cross references:  
Obsoletes:         RHSA-2001:004
---------------------------------------------------------------------

1. Topic:

Updated icecast packages are available which fix a number of security issues.

2. Relevant releases/architectures:

Red Hat Powertools 7.0 - alpha, i386

Red Hat Powertools 7.1 - alpha, i386

3. Problem description:

Icecast is a mp3-based broadcasting system. Buffer overflows in Icecast
1.3.11 and earlier allow remote attackers to execute arbitrary code via a
long HTTP GET request. The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CAN-2002-0177 to this issue.

Additional buffer overflow vulnerabilities exist in previous versions of
Icecast that are also fixed by this update.  These vulnerabilities can
cause denial of service attacks as well as arbitrary code execution. The
Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned
the names CAN-2001-0784, CAN-2001-1083, CAN-2001-1229, and CAN-2001-1230 to
these issues.

Users of Icecast are advised to update to the errata packages containing
Icecast 1.3.12 which is not vulnerable to these issues.

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.

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



6. RPMs required:

Red Hat Powertools 7.0:

SRPMS:
ftp://updates.redhat.com/7.0/en/powertools/SRPMS/icecast-1.3.12-1.src.rpm

alpha:
ftp://updates.redhat.com/7.0/en/powertools/alpha/icecast-1.3.12-1.alpha.rpm

i386:
ftp://updates.redhat.com/7.0/en/powertools/i386/icecast-1.3.12-1.i386.rpm

Red Hat Powertools 7.1:

SRPMS:
ftp://updates.redhat.com/7.1/en/powertools/SRPMS/icecast-1.3.12-1.src.rpm

alpha:
ftp://updates.redhat.com/7.1/en/powertools/alpha/icecast-1.3.12-1.alpha.rpm

i386:
ftp://updates.redhat.com/7.1/en/powertools/i386/icecast-1.3.12-1.i386.rpm



7. Verification:

MD5 sum                          Package Name
--------------------------------------------------------------------------
baaf27a3908bfa01191452e3f4fc9c08 7.0/en/powertools/SRPMS/icecast-1.3.12-1.src.rpm
135f94bf2781ffe7ca1d5d19a4fc7e6a 7.0/en/powertools/alpha/icecast-1.3.12-1.alpha.rpm
50d6273850643032246b3a98d03ef61d 7.0/en/powertools/i386/icecast-1.3.12-1.i386.rpm
baaf27a3908bfa01191452e3f4fc9c08 7.1/en/powertools/SRPMS/icecast-1.3.12-1.src.rpm
135f94bf2781ffe7ca1d5d19a4fc7e6a 7.1/en/powertools/alpha/icecast-1.3.12-1.alpha.rpm
50d6273850643032246b3a98d03ef61d 7.1/en/powertools/i386/icecast-1.3.12-1.i386.rpm
 

These packages are GPG signed by Red Hat, Inc. for security.  Our key
is available at:
    http://www.redhat.com/about/contact/pgpkey.html

You can verify each package with the following command:
    rpm --checksig  <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:
    rpm --checksig --nogpg <filename>

8. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-0784
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-1083
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-1229
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-1230
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0177


Copyright(c) 2000, 2001, 2002 Red Hat, Inc.



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