Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2001.110 -- FreeBSD-SA-01:23.icecast
icecast port contains remote vulnerability
13 March 2001
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: icecast
Vendor: FreeBSD Ports Collection
Operating System: FreeBSD
BSD
Linux
Platform: i386
Alpha
Impact: Root Compromise
Execute Arbitrary Code/Commands
Access Required: Remote
- --------------------------BEGIN INCLUDED TEXT--------------------
- -----BEGIN PGP SIGNED MESSAGE-----
=============================================================================
FreeBSD-SA-01:23 Security Advisory
FreeBSD, Inc.
Topic: icecast port contains remote vulnerability
Category: ports
Module: icecast
Announced: 2001-03-12
Credits: |CyRaX| <cyrax@pkcrew.org>
Affects: Ports collection prior to the correction date.
Corrected: 2001-03-10
Vendor status: Unresponsive
FreeBSD only: NO
I. Background
icecast is a server for streaming MP3 audio.
II. Problem Description
The icecast software, versions prior to 1.3.7_1, contains multiple
format string vulnerabilities, which allow a remote attacker to
execute arbitrary code as the user running icecast, usually the root
user.
There are a number of other potential abuses of format strings which
may or may not pose security risks, but have not currently been
audited.
The icecast port is not installed by default, nor is it "part of
FreeBSD" as such: it is part of the FreeBSD ports collection, which
contains nearly 4700 third-party applications in a ready-to-install
format. The ports collections shipped with FreeBSD 3.5.1 and 4.2
contain this problem since it was discovered after the releases.
FreeBSD makes no claim about the security of these third-party
applications, although an effort is underway to provide a security
audit of the most security-critical ports.
III. Impact
Arbitrary remote users can execute arbitrary code on the local system
as the user running icecast, usually the root user.
If you have not chosen to install the icecast port/package, then your
system is not vulnerable to this problem.
IV. Workaround
Deinstall the icecast port/package, if you have installed it.
V. Solution
Consider running the icecast software as a non-privileged user to
minimize the impact of further security vulnerabilities in this
software.
To upgrade icecast, choose one of the following options:
1) Upgrade your entire ports collection and rebuild the icecast port.
2) Deinstall the old package and install a new package dated after the
correction date, obtained from:
[i386]
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/audio/icecast-1.3.7_1.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/audio/icecast-1.3.7_1.tgz
NOTE: It may be several days before updated packages are available
[alpha]
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/audio/icecast-1.3.7_1.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/audio/icecast-1.3.7_1.tgz
3) download a new port skeleton for the icecast port from:
http://www.freebsd.org/ports/
and use it to rebuild the port.
4) Use the portcheckout utility to automate option (3) above. The
portcheckout port is available in /usr/ports/devel/portcheckout or the
package can be obtained from:
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/devel/portcheckout-2.0.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/devel/portcheckout-2.0.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/devel/portcheckout-2.0.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/devel/portcheckout-2.0.tgz
- -----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.4 (FreeBSD)
Comment: For info see http://www.gnupg.org
iQCVAwUBOq1b9lUuHi5z0oilAQF0VQQAgjsvLSPtZ1pu6OtkGxuMJhCmmeCvFJvL
4szsF1csrFrXhaH7z1VjJP8r/Q2NBzWcS3qujkhGRObsGGyvAJKk7QVrqnjXV3gD
rgLnphjNlKt0VuXafxXwTT8YTxoCbzOHy23aa0KaRWoCAVcVi4AAZs4XHEUgU+Ov
lWOyEgxUBEk=
=WM3Y
- -----END PGP SIGNATURE-----
- --------------------------END INCLUDED TEXT--------------------
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to use any or all of this information is
the responsibility of each user or organisation, and should be done so in
accordance with site policies and procedures.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the original authors to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
http://www.auscert.org.au/Information/advisories.html
If you believe that your system has been compromised, contact AusCERT or
your representative in FIRST (Forum of Incident Response and Security
Teams).
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for emergencies.
-----BEGIN PGP SIGNATURE-----
Version: 2.6.3i
Charset: noconv
Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key
iQCVAwUBOq4AMCh9+71yA2DNAQEhowP+KZPni0srqBRjFehqR39yIQqbz5tpyqBq
ii8s3XA81NoLJ0fX+iD5pvMzlwCNxSVEl0iNSKlxP3iLfF5Ej2HsaJwVq3tNUGJ5
XQKT7yoXnhVrpFAxbZwS4gviQDZOwixIK3nCoFJNwu1kAi+bLZ3TB9bJVhtbgQyd
AChi9h3PzZ0=
=BPG/
-----END PGP SIGNATURE-----