PHP 5.6.x < 5.6.27 Multiple Vulnerabilities

critical Web App Scanning Plugin ID 98817

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Synopsis

Description

According to its banner, the version of PHP running on the remote web server is 5.6.x prior to 5.6.27. It is, therefore, affected by multiple vulnerabilities :

- A NULL pointer dereference flaw exists in the SimpleXMLElement::asXML() function within file ext/simplexml/simplexml.c. An unauthenticated, remote attacker can exploit this to cause a denial of service condition.

- A heap-based buffer overflow condition exists in the php_ereg_replace() function within file ext/ereg/ereg.c due to improper validation of user-supplied input. An unauthenticated, remote attacker can exploit this to cause a denial of service condition or the execution of arbitrary code.

- A flaw exists in the openssl_random_pseudo_bytes() function within file ext/openssl/openssl.c when handling strings larger than 2GB. An unauthenticated, remote attacker can exploit this to cause a denial of service condition.

- A flaw exists in the openssl_encrypt() function within file ext/openssl/openssl.c when handling strings larger than 2GB. An unauthenticated, remote attacker can exploit this to cause a denial of service condition.

- An integer overflow condition exists in the imap_8bit() function within file ext/imap/php_imap.c due to improper validation of user-supplied input. An unauthenticated, remote attacker can exploit this to cause a denial of service condition or the execution of arbitrary code.

- A flaw exists in the _bc_new_num_ex() function within file ext/bcmath/libbcmath/src/init.c when handling values passed via the 'scale' parameter. An unauthenticated, remote attacker can exploit this to cause a denial of service condition.

- A flaw exists in the php_resolve_path() function within file main/fopen_wrappers.c when handling negative size values passed via the 'filename' parameter. An unauthenticated, remote attacker can exploit this to cause a denial of service condition.

- A flaw exists in the dom_document_save_html() function within file ext/dom/document.c due to missing NULL checks. An unauthenticated, remote attacker can exploit this to cause a denial of service condition.

- A use-after-free error exists in the unserialize() function that allows an unauthenticated, remote attacker to dereference already freed memory, resulting in the execution of arbitrary code.

- An integer overflow condition exists in the mb_encode_*() functions in file ext/mbstring/mbstring.c due to improper validation of the length of encoded data. An unauthenticated, remote attacker can exploit this to cause a denial of service condition or the execution of arbitrary code.

- A NULL pointer dereference flaw exists in the CachingIterator() function within file ext/spl/spl_iterators.c when handling string conversions. An unauthenticated, remote attacker can exploit this to cause a denial of service condition.

- An integer overflow condition exists in the number_format() function within file ext/standard/math.c when handling 'decimals' and 'dec_point' parameters that have values that are equal or close to 0x7fffffff. An unauthenticated, remote attacker can exploit this to cause a heap buffer overflow, resulting in a denial of service condition or the execution of arbitrary code.

- A stack-based overflow condition exists in the ResourceBundle::create and ResourceBundle::getLocales methods and their respective functions within file ext/intl/resourcebundle/resourcebundle_class.c due to improper validation of input passed via the 'bundlename' parameter. An unauthenticated, remote attacker can exploit this to cause a denial of service condition or the execution or arbitrary code.

- An integer overflow condition exists in the php_pcre_replace_impl() function within file ext/pcre/php_pcre.c due to improper validation of user-supplied input. An unauthenticated, remote attacker can exploit this to cause a heap-based buffer overflow, resulting in a denial of service condition or the execution of arbitrary code.

Note that the scanner has not attempted to exploit this issue but has instead relied only on the application's self-reported version number.