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[edit] Last updated: Fri, 26 Apr 2013

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libxml_disable_entity_loader

(PHP 5 >= 5.2.11)

libxml_disable_entity_loaderDisable the ability to load external entities

Description

bool libxml_disable_entity_loader ([ bool $disable = true ] )

Disable/enable the ability to load external entities.

Parameters

disable

Disable (TRUE) or enable (FALSE) libxml extensions (such as DOM, XMLWriter and XMLReader) to load external entities.

Return Values

Returns the previous value.

See Also



add a note add a note User Contributed Notes libxml_disable_entity_loader - [1 notes]
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simonsimcity
1 year ago
Using this function you can prevent a vulnerable to Local and Remote File Inclusion attacks.

You'll see it in an example where I load and validate the following string:

<!DOCTYPE scan [<!ENTITY test SYSTEM "php://filter/read=convert.base64-encode/resource=/etc/passwd">]>
<scan>&test;</scan>

One way to prevent that the file in given back is to set this value to 0.
Please take a closer look at the release of symfony 2.0.11

 
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