Cross-site scripting (XSS) vulnerability in PHP, possibly 5.2.7 and earlier, when displayerrors is enabled, allows remote attackers to inject arbitrary web script or HTML via unspecified vectors. NOTE: because of the lack of details, it is unclear whether this is related to CVE-2006-0208.

The IMAP functionality in PHP before 4.3.1 allows remote attackers to cause a denial of service via an e-mail message with a (1) To or (2) From header with an address that contains a large number of "\" (backslash) characters.

Buffer overflows in PHP before 4.3.3 have unknown impact and unknown attack vectors.

Integer overflows in (1) base64encode and (2) the GD library for PHP before 4.3.3 have unknown impact and unknown attack vectors.

Integer signedness error in emalloc() function for PHP before 4.3.2 allow remote attackers to cause a denial of service (memory consumption) and possibly execute arbitrary code via negative arguments to functions such as (1) socketrecv, (2) socketrecvfrom, and possibly other functions.

The imapheader function in the IMAP functionality for PHP before 4.3.0 allows remote attackers to cause a denial of service via an e-mail message with a large number of "To" addresses, which triggers an error in the rfc822writeaddress function.

Cross-site scripting (XSS) vulnerability in the phpinfo function in PHP 4.2.3 allows remote attackers to inject arbitrary web script or HTML via the query string argument, as demonstrated using soinfo.php.

Race condition in the symlink function in PHP 5.1.6 and earlier allows local users to bypass the openbasedir restriction by using a combination of symlink, mkdir, and unlink functions to change the file path after the openbasedir check and before the file is opened by the underlying system, as demonstrated by symlinking a symlink into a subdirectory, to point to a parent directory via .. (dot dot) sequences, and then unlinking the resulting symlink.

Integer overflow in PHP 5 up to 5.1.6 and 4 before 4.3.0 allows remote attackers to execute arbitrary code via an argument to the unserialize PHP function with a large value for the number of array elements, which triggers the overflow in the Zend Engine ecalloc function (Zend/zendalloc.c).

The zendrestoreinientrycb function in zendini.c in PHP 5.3.0, 5.2.10, and earlier versions allows context-specific attackers to obtain sensitive information (memory contents) and cause a PHP crash by using the iniset function to declare a variable, then using the inirestore function to restore the variable.

CRLF injection vulnerability in PHP 4.2.1 through 4.2.3, when allowurlfopen is enabled, allows remote attackers to modify HTTP headers for outgoing requests by causing CRLF sequences to be injected into arguments that are passed to the (1) fopen or (2) file functions.

Heap-based buffer overflow in the wordwrap function in PHP after 4.1.2 and before 4.3.0 may allow attackers to cause a denial of service or execute arbitrary code.

The deserialization code in PHP before 4.3.10 and PHP 5.x up to 5.0.2 allows remote attackers to cause a denial of service and execute arbitrary code via untrusted data to the unserialize function that may trigger "information disclosure, double-free and negative reference index array underflow" results.

Buffer overflow in the exifreaddata function in PHP before 4.3.10 and PHP 5.x up to 5.0.2 allows remote attackers to execute arbitrary code via a long section name in an image file.

The memorylimit functionality in PHP 4.x up to 4.3.7, and 5.x up to 5.0.0RC3, under certain conditions such as when registerglobals is enabled, allows remote attackers to execute arbitrary code by triggering a memorylimit abort during execution of the zendhashinit function and overwriting a HashTable destructor pointer before the initialization of key data structures is complete.

The striptags function in PHP 4.x up to 4.3.7, and 5.x up to 5.0.0RC3, does not filter null (\0) characters within tag names when restricting input to allowed tags, which allows dangerous tags to be processed by web browsers such as Internet Explorer and Safari, which ignore null characters and facilitate the exploitation of cross-site scripting (XSS) vulnerabilities.

CRLF injection vulnerability in the mbsendmail function in PHP before 5.1.0 might allow remote attackers to inject arbitrary e-mail headers via line feeds (LF) in the "To" address argument.

The exifreaddata function in the Exif module in PHP before 4.4.1 allows remote attackers to cause a denial of service (infinite loop) via a malformed JPEG image.

The apache2handler SAPI (sapiapache2.c) in the Apache module (modphp) for PHP 5.x before 5.1.0 final and 4.4 before 4.4.1 final allows attackers to cause a denial of service (segmentation fault) via the session.savepath option in a .htaccess file or VirtualHost.

The RFC1867 file upload feature in PHP 4.x up to 4.4.0 and 5.x up to 5.0.5, when registerglobals is enabled, allows remote attackers to modify the GLOBALS array and bypass security protections of PHP applications via a multipart/form-data POST request with a "GLOBALS" fileupload field.

Unspecified vulnerability in PHP before 4.4.1, when using the virtual function on Apache 2, allows remote attackers to bypass safemode and openbasedir directives.

Multiple vulnerabilities in PHP before 4.4.1 allow remote attackers to bypass safemode and openbasedir restrictions via unknown attack vectors in (1) ext/curl and (2) ext/gd.

The parsestr function in PHP 4.x up to 4.4.0 and 5.x up to 5.0.5, when called with only one parameter, allows remote attackers to enable the registerglobals directive via inputs that cause a request to be terminated due to the memorylimit setting, which causes PHP to set an internal flag that enables registerglobals and allows attackers to exploit vulnerabilities in PHP applications that would otherwise be protected.

Cross-site scripting (XSS) vulnerability in the phpinfo function in PHP 4.x up to 4.4.0 and 5.x up to 5.0.5 allows remote attackers to inject arbitrary web script or HTML via a crafted URL with a "stacked array assignment."

PHP before 5.3.4 accepts the \0 character in a pathname, which might allow context-dependent attackers to bypass intended access restrictions by placing a safe file extension after this character, as demonstrated by .php\0.jpg at the end of the argument to the fileexists function.

PHP 4.x up to 4.4.4 and PHP 5 up to 5.1.6 allows local users to bypass certain Apache HTTP Server httpd.conf options, such as safemode and openbasedir, via the inirestore function, which resets the values to their php.ini (Master Value) defaults.

PHP before 4.4.3 and 5.x before 5.1.4 does not limit the character set of the session identifier (PHPSESSID) for third party session handlers, which might make it easier for remote attackers to exploit other vulnerabilities by inserting PHP code into the PHPSESSID, which is stored in the session file. NOTE: it could be argued that this not a vulnerability in PHP itself, rather a design limitation that enables certain attacks against session handlers that do not account for this limitation.

scanf.c in PHP 5.1.4 and earlier, and 4.4.3 and earlier, allows context-dependent attackers to execute arbitrary code via a sscanf PHP function call that performs argument swapping, which increments an index past the end of an array and triggers a buffer over-read.

zendhashdelkeyorindex in zendhash.c in PHP before 4.4.3 and 5.x before 5.1.3 can cause zendhashdel to delete the wrong element, which prevents a variable from being unset even when the PHP unset function is called, which might cause the variable's value to be used in security-relevant operations.

The errorlog function in basicfunctions.c in PHP before 4.4.4 and 5.x before 5.1.5 allows local users to bypass safe mode and openbasedir restrictions via a "php://" or other scheme in the third argument, which disables safe mode.