Technical Description

Multiple vulnerabilities have been identified in PHP, which could be exploited by attackers or malicious users to bypass security restrictions or execute arbitrary commands.

The first issue is due to missing "safe_mode" and "open_basedir" checks in the "error_log()", "file_exists()", "imap_open()", and "imap_reopen()" functions, which could be exploited by attackers to bypass security restrictions.

The second flaw is due to buffer overflow errors in the "str_repeat()" and "wordwrap()" functions on 64bit systems, which could be exploited by attackers or malicious users to execute arbitrary commands.

The third vulnerability is due to errors in the cURL extension and the realpath cache, which could be exploited by attackers to bypass "safe_mode" and "open_basedir" restrictions.

The fourth flaw is due to a buffer overflow error in the GD extension when handling malformed GIF images, which could be exploited by attackers or malicious users to execute arbitrary commands.

The fifth vulnerability is due to a buffer overflow error in the "sscanf()" function, which could be exploited by attackers or malicious users to execute arbitrary commands.

The sixth issue is due to an out-of-bounds memory read in the "stripos()" function.

The seventh flaw is due to incorrect "memory_limit" restrictions on 64 bit systems.

Affected Products

PHP version 4.4.3 and prior
PHP version 5.1.4 and prior

Solution

Upgrade to PHP version 4.4.4 or 5.1.5 :
http://www.php.net/downloads.php

References

http://www.vupen.com/english/advisories/2006/3318
http://www.php.net/release_4_4_4.php
http://www.php.net/release_5_1_5.php

Credits

Vulnerabilities reported by the vendor

ChangeLog

2006-08-18 : Initial release

Vulnerability Management

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