PHP cURL library curl_init() safe mode bypass
| php-curl-safemode-bypass (26764) |  Medium Risk |
Description:
The PHP cURL library (libcurl) could allow a remote attacker to bypass safe mode restrictions, caused by improper validation of user-supplied input by the curl_init() function. A remote attacker could exploit this vulnerability using a file:// request containing a NULL character to bypass security restrictions and gain unauthorized access to arbitrary files on Web servers that are running an affected version of PHP.
Platforms Affected:
- MandrakeSoft, Mandrake Linux 2006
- MandrakeSoft, Mandrake Linux 2006 X86_64
- MandrakeSoft, Mandrake Linux LE2005 X86_64
- MandrakeSoft, Mandrake Linux LE2005
- MandrakeSoft, Mandrake Linux Corporate Server 3.0
- MandrakeSoft, Mandrake Linux Corporate Server 3.0 X86_64
- MandrakeSoft, Mandrake Multi Network Firewall 2.0
- Novell, Linux POS 9
- Novell, Open Enterprise Server
- Novell, Open Enterprise Server
- Novell, UnitedLinux 1.0
- PHP, PHP 4.4.2
- PHP, PHP 5.1.4
- SuSE, SLE SDK 10
- SuSE, SuSE Linux 10.0
- SuSE, SuSE Linux 10.1
- SuSE, SuSE Linux 9.2
- SuSE, SuSE Linux 9.3
- SuSE, SuSE Linux Enterprise Server 8.0
- SuSE, SuSE Linux OpenExchange Server 4
- SuSE, SuSE Linux Retail Solution 8
- SuSE, SuSE Linux School Server
- SuSE, SuSE Linux Standard Server 8
- SuSE, SuSE SLES 10
- SuSE, SuSE SLES 9
Remedy:
Upgrade to the latest CVS version of the cURL library, available from the PHP CVS Repository. See References.
For SUSE Linux:
Refer to SUSE-SA:2006:052 for patch, upgrade, or suggested workaround information. See References.
Consequences:
Bypass Security
References:
- BugTraq Mailing List, Fri May 26 2006 - 18:24:51 CDT , cURL Safe Mode Bypass PHP 4.4.2 and 5.1.4 at http://archives.neohapsis.com/archives/bugtraq/2006-05/0604.html.
- PHP CVS Repository, [cvs] Index of /php-src/ext/curl at http://cvs.php.net/viewcvs.cgi/php-src/ext/curl/.
- BID-18116: PHP cURL Encoded NULL Character Safe_Mode Restriction Bypass Vulnerability
- CVE-2006-2563: The cURL library (libcurl) in PHP 4.4.2 and 5.1.4 allows attackers to bypass safe mode and read files via a file:// request containing null characters.
- MDKSA-2006:122: Updated php packages fix multiple vulnerabilities
- SA20337: PHP "curl_init()" Safe Mode Bypass Weakness
- SECTRACK ID: 1016175: PHP libcurl Bug in Processing `file://` URLs Containing NULL Characters Lets Users Bypass Safe Mode Restrictions
- SUSE-SA:2006:052: php4php5 security update
- SUSE-SR:2006:022: SUSE Security Summary Report
- VUPEN/ADV-2006-2055: PHP curl_init() Function Null Byte Character Safe Mode Bypass Vulnerability
Reported:
May 26, 2006
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