source: php4
date: May 28th, 2007
author: Stefan Fritsch
vuln-type: several vulnerabilities
problem-scope: remote
debian-specifc: no
cve: CVE-2007-1286 CVE-2007-1380 CVE-2007-1521 CVE-2007-1583 CVE-2007-1718 CVE-2007-1777 CVE-2007-2509
vendor-advisory: 
testing-fix: 6:4.4.4-9+lenny1
sid-fix: 6:4.4.6-2
upgrade: apt-get upgrade

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.