The Debian Security Team published a new security update for Debian GNU/Linux. Here the announcement:

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Debian Security Advisory DSA-1711-1 security@debian.org
http://www.debian.org/security/ Nico Golde
January 26, 2009 http://www.debian.org/security/faq
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Package : typo3-src
Vulnerability : several
Problem type : remote
Debian-specific: no
CVE ID : CVE-2009-0255 CVE-2009-0256 CVE-2009-0257 CVE-2009-0258
Debian Bug : 512608
BugTraq ID : 33376

Several remotely exploitable vulnerabilities have been discovered in the
TYPO3 web content management framework. The Common Vulnerabilities and
Exposures project identifies the following problems:

CVE-2009-0255
Chris John Riley discovered that the TYPO3-wide used encryption key is
generated with an insufficiently random seed resulting in low entropy
which makes it easier for attackers to crack this key.

CVE-2009-0256
Marcus Krause discovered that TYPO3 is not invalidating a supplied session
on authentication which allows an attacker to take over a victims
session via a session fixation attack.

CVE-2009-0257
Multiple cross-site scripting vulnerabilities allow remote attackers to
inject arbitrary web script or HTML via various arguments and user-
supplied strings used in the indexed search system extension, adodb
extension test scripts or the workspace module.

CVE-2009-0258
Mads Olesen discovered a remote command injection vulnerability in
the indexed search system extension which allows attackers to
execute arbitrary code via a crafted file name which is passed
unescaped to various system tools that extract file content for
the indexing.


Because of CVE-2009-0255, please make sure that besides installing
this update, you also create a new encryption key after the
installation.

For the stable distribution (etch) these problems have been fixed in
version 4.0.2+debian-7.

For the unstable distribution (sid) these problems have been fixed in
version 4.2.5-1.

We recommend that you upgrade your TYPO3 packages.

Upgrade instructions
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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 4.0 alias etch
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Source archives:

http://security.debian.org/pool/updates/main/t/typo3-src/typo3-src_4.0.2+debian.orig.tar.gz
Size/MD5 checksum: 7683527 be509391b0e4d24278c14100c09dc673
http://security.debian.org/pool/updates/main/t/typo3-src/typo3-src_4.0.2+debian-7.diff.gz
Size/MD5 checksum: 23596 344f6b5ada56d361e274556d6d7eaf99
http://security.debian.org/pool/updates/main/t/typo3-src/typo3-src_4.0.2+debian-7.dsc
Size/MD5 checksum: 610 6b99cc9acd82ec6010a38006910169c9

Architecture independent packages:

http://security.debian.org/pool/updates/main/t/typo3-src/typo3_4.0.2+debian-7_all.deb
Size/MD5 checksum: 76924 33b4077e99038121aa5667a3a166d99e
http://security.debian.org/pool/updates/main/t/typo3-src/typo3-src-4.0_4.0.2+debian-7_all.deb
Size/MD5 checksum: 7691182 f5c8ecbf93c7af50b29b5ded8f455b75


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

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For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/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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