secure testing announce - May 2007 - [SECURITY] [DTSA-40-1] New php4 packages fix several vulnerabilities

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Debian Testing Security Advisory DTSA-40-1                  May 28th, 2007
secure-testing-team at lists.alioth.debian.org                 Stefan Fritsch
http://secure-testing-master.debian.net/
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Package        : php4
Vulnerability  : several vulnerabilities
Problem-Scope  : remote
Debian-specific: No
CVE ID         : CVE-2007-1286 CVE-2007-1380 CVE-2007-1521 CVE-2007-1583
CVE-2007-1718 CVE-2007-1777 CVE-2007-2509

IMPORTANT NOTE: 
    php4 will be removed from testing (lenny); thus you are strongly
    advised to migrate to php5. If you cannot upgrade, you should
    consider using the stable distribution (etch) instead.

Several remote vulnerabilities have been discovered in PHP, a
server-side, HTML-embedded scripting language, which may lead to the
execution of arbitrary code. The Common Vulnerabilities and Exposures
project identifies the following problems:

CVE-2007-1286
    Stefan Esser discovered an overflow in the object reference handling
    code of the unserialize() function, which allows the execution of
    arbitrary code if malformed input is passed from an application.

CVE-2007-1380
    Stefan Esser discovered that the session handler performs
    insufficient validation of variable name length values, which allows
    information disclosure through a heap information leak.

CVE-2007-1521
    Stefan Esser discovered a double free vulnerability in the
    session_regenerate_id() function, which allows the execution of
    arbitrary code. 

CVE-2007-1538
    Stefan Esser discovered that the mb_parse_str function sets the internal
    register_globals flag and does not disable it in certain cases when a script
    terminates, which allows remote attackers to invoke available PHP scripts
with
    register_globals functionality that is not detectable by these scripts

CVE-2007-1718
    Stefan Esser discovered that the mail() function performs
    insufficient validation of folded mail headers, which allows mail
    header injection.

CVE-2007-1777
    Stefan Esser discovered that the extension to handle ZIP archives
    performs insufficient length checks, which allows the execution of
    arbitrary code.

CVE-2007-2509
    It was discovered that the ftp extension of PHP, a server-side,
    HTML-embedded scripting language performs insufficient input sanitising,
    which permits an attacker to execute arbitrary FTP commands. This
    requires the attacker to already have access to the FTP server.

For the testing distribution (lenny) this is fixed in version
6:4.4.4-9+lenny1

Packages for the alpha, mipsel, and powerpc architectures are still missing and
will
be released when they become available.

For the unstable distribution (sid) this is fixed in version
6:4.4.6-2

This upgrade is recommended if you use php4.

Upgrade Instructions
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To use the Debian testing security archive, add the following lines to
your /etc/apt/sources.list:

deb http://security.debian.org/ testing/updates main contrib non-free
deb-src http://security.debian.org/ testing/updates main contrib non-free

To install the update, run this command as root:

apt-get update && apt-get upgrade

For further information about the Debian testing security team, please refer
to http://secure-testing-master.debian.net/
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