New! Vulnerability Priority Rating (VPR)
Tenable calculates a dynamic VPR for every vulnerability. VPR combines vulnerability information with threat intelligence and machine learning algorithms to predict which vulnerabilities are most likely to be exploited in attacks. Read more about what VPR is and how it's different from CVSS.
VPR Score: 5.9
SynopsisThe remote web server uses a version of PHP that is affected by multiple vulnerabilities.
DescriptionAccording to its banner, the version of PHP running on the remote web server is 5.5.x prior to 5.5.28. It is, therefore, affected by multiple vulnerabilities :
- Multiple use-after-free errors exist in spl_array.c, spl_observer.c, and spl_dllist.c due to improper sanitization of input to the unserialize() function. An attacker can exploit these issues, by using a specially crafted SplDoublyLinkedList, SplArrayObject, or SplObjectStorage object, to deference freed memory and thus execute arbitrary code. (CVE-2015-6831)
- A dangling pointer error exists in file spl_array.c due to improper sanitization of input to the unserialize() function. An attacker can exploit this, by using a specially crafted SplDoublyLinkedList object, to gain control over a deallocated pointer and thus execute arbitrary code. (CVE-2015-6832)
- A path traversal flaw exists in file phar_object.c due to improper sanitization of user-supplied input. An attacker can exploit this to write arbitrary files.
- A type confusion flaw exists in the serialize_function_call() function in soap.c due to improper validation of input passed via the header field. A remote attacker can exploit this to execute arbitrary code. (CVE-2015-6836)
- Multiple type confusion flaws exist in the _call() method in file php_http.c when handling calls for zend_hash_get_current_key or 'Z*'. An attacker can exploit this to disclose memory contents or crash an application using PHP. (CVE-2015-8835)
- The openssl_random_pseudo_bytes() function in file openssl.c does not generate sufficiently random numbers.
This allows an attacker to more easily predict the results, thus allowing further attacks to be carried out. (CVE-2015-8867)
- A flaw exists in file zend_exceptions.c due to the improper use of the function unserialize() during recursive method calls. A remote attacker can exploit this to crash an application using PHP. (CVE-2015-8873)
- A flaw exists in file zend_exceptions.c due to insufficient type checking by functions unserialize() and __toString(). A remote attacker can exploit this to cause a NULL pointer deference or unexpected method execution, thus causing an application using PHP to crash. (CVE-2015-8876)
- An integer truncation flaw exists in the zend_hash_compare() function in zend_hash.c that is triggered when comparing arrays. A remote attacker can exploit this to cause arrays to be improperly matched during comparison.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
SolutionUpgrade to PHP version 5.5.28 or later.