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Sicherheit: Unsichere Filterregeln in ipmasq
Aktuelle Meldungen Distributionen
Name: Unsichere Filterregeln in ipmasq
ID: DSA-389-1
Distribution: Debian
Plattformen: Debian woody
Datum: Mo, 22. September 2003, 13:00
Referenzen: Keine Angabe
Applikationen: ipmasq

Originalnachricht

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Debian Security Advisory DSA 389-1 security@debian.org
http://www.debian.org/security/ Matt Zimmerman
September 20th, 2003 http://www.debian.org/security/faq
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Package : ipmasq
Vulnerability : insecure packet filtering rules
Problem-Type : remote
Debian-specific: no
CVE Ids : CAN-2003-0785

ipmasq is a package which simplifies configuration of Linux IP
masquerading, a form of network address translation which allows a
number of hosts to share a single public IP address. Due to use of
certain improper filtering rules, traffic arriving on the external
interface addressed for an internal host would be forwarded,
regardless of whether it was associated with an established
connection. This vulnerability could be exploited by an attacker
capable of forwarding IP traffic with an arbitrary destination address
to the external interface of a system with ipmasq installed.

For the current stable distribution (woody) this problem has been
fixed in version 3.5.10c.

For the unstable distribution (sid) this problem has been fixed in
version 3.5.12.

We recommend that you update your ipmasq package.

Upgrade Instructions
--------------------

wget url
will fetch the file for you
dpkg -i file.deb
will install the referenced file.

If you are using the apt-get package manager, use the line for
sources.list as given below:

apt-get update
will update the internal database
apt-get upgrade
will install corrected packages

You may use an automated update by adding the resources from the
footer to the proper configuration.

Debian GNU/Linux 3.0 alias woody
--------------------------------

Source archives:

http://security.debian.org/pool/updates/main/i/ipmasq/ipmasq_3.5.10c.dsc
Size/MD5 checksum: 502 f5f259d819d47b687c3da42d931b1404
http://security.debian.org/pool/updates/main/i/ipmasq/ipmasq_3.5.10c.tar.gz
Size/MD5 checksum: 30656 e9a9a1f86bd88dcceaeba900698165bb

Architecture independent components:

ipmasq_3.5.10c_all.deb
Size/MD5 checksum: 47748 199a747d5c48c145cf34772f26cbba4d

These files will probably be moved into the stable distribution on
its next revision.

--------------------------------------------------------------------------------
-
For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-securitydists/stable/updates/main
Mailing list: debian-security-announce@lists.debian.org
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>
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