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PHP Multiple Code Execution Vulnerabilities
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Secunia Advisory:
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SA24542
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Release Date:
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2007-03-16
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Last Update:
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2007-05-04
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Popularity:
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10,596 views
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Critical:
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Less critical
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Impact:
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Exposure of sensitive information
Privilege escalation
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Where:
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Local system
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Solution Status:
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Partial Fix
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| Software: | PHP 4.4.x
PHP 5.2.x
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Subscribe:
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Instant alerts on relevant vulnerabilities 
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| CVE reference: | CVE-2007-1484
CVE-2007-1581
CVE-2007-1582
CVE-2007-1883
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Description:
Stefan Esser has discovered some vulnerabilities and a weakness in PHP, which can be exploited by malicious users to disclose potentially sensitive information or to gain escalated privileges.
1) An error in the "array_user_key_compare()" function where key references are incorrectly destroyed can be exploited to cause memory corruption.
2) An error in the handling of resource data can be exploited to destroy and replace certain resources by interrupting the processing PHP function (e.g. functions of the GD extension). This allows read and write access to arbitrary memory addresses.
Successful exploitation of these vulnerabilities allows execution of arbitrary code, which can lead to security restrictions, such as the "disable_functions" directive, being bypassed.
3) An error in the handling of references in functions can be exploited to read arbitrary heap memory via a user space error handler interrupting e.g. the "iptcembed()" function.
The vulnerabilities are confirmed in version 5.2.1 and also reported in version 4.4.6. Other versions may also be affected.
Solution:
Update to version 5.2.2 or 4.4.7 to fix vulnerability #1. Grant only trusted users permissions to execute PHP code.
Provided and/or discovered by:
Stefan Esser
Changelog:
2007-03-20: Updated "Description" section and "Title". Added vulnerability #2.
2007-03-21: Added link to "Original Advisory" section.
2007-03-21: Added CVE reference.
2007-03-26: Added CVE reference.
2007-03-30: Updated "Description" section. Added weakness #3.
2007-04-12: Added CVE reference.
2007-05-04: Updated "Solution" section.
Original Advisory:
PHP:
http://www.php.net/releases/5_2_2.php
http://www.php.net/releases/4_4_7.php
MOPB:
1) http://www.php-security.org/MOPB/MOPB-24-2007.html
2) http://www.php-security.org/MOPB/MOPB-27-2007.html
http://www.php-security.org/MOPB/MOPB-28-2007.html
3) http://www.php-security.org/MOPB/MOPB-37-2007.html
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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