Several vulnerabilities were found in PHP, a general-purpose scripting language commonly used for web application development.

The vulnerabilities are addressed by upgrading PHP to new upstream versions (5.4.45 and 5.6.13), which include additional bug fixes.
Please refer to the upstream changelog for more information :

  - https://php.net/ChangeLog-5.php#5.4.45
  - https://php.net/ChangeLog-5.php#5.6.13

- CVE-2015-6831 Use after free vulnerability was found in     unserialize() function. We can create ZVAL and free it     via Serializable::unserialize. However the unserialize()     will still allow to use R: or r: to set references to     that already freed memory. It is possible to     use-after-free attack and execute arbitrary code     remotely.

  - CVE-2015-6832 Dangling pointer in the unserialization of     ArrayObject items.

  - CVE-2015-6833 Files extracted from archive may be placed     outside of destination directory

  - CVE-2015-6834 Use after free vulnerability was found in     unserialize() function. We can create ZVAL and free it     via Serializable::unserialize. However the unserialize()     will still allow to use R: or r: to set references to     that already freed memory. It is possible to     use-after-free attack and execute arbitrary code     remotely.

  - CVE-2015-6836 A type confusion occurs within SOAP     serialize_function_call due to an insufficient     validation of the headers field. In the SoapClient's
    __call method, the verify_soap_headers_array check is     applied only to headers retrieved from     zend_parse_parameters; problem is that a few lines     later, soap_headers could be updated or even replaced     with values from the __default_headers object fields.

  - CVE-2015-6837 The XSLTProcessor class misses a few     checks on the input from the libxslt library. The     valuePop() function call is able to return NULL pointer     and php does not check that.

  - CVE-2015-6838 The XSLTProcessor class misses a few     checks on the input from the libxslt library. The     valuePop() function call is able to return NULL pointer     and php does not check that.

  - CVE-2015-7803 A NULL pointer dereference flaw was found     in the way PHP's Phar extension parsed Phar archives. A     specially crafted archive could cause PHP to crash.

  - CVE-2015-7804 An uninitialized pointer use flaw was     found in the phar_make_dirstream() function of PHP's     Phar extension. A specially crafted phar file in the ZIP     format with a directory entry with a file name '/ZIP'     could cause a PHP application function to crash.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote host is affected by the vulnerability described in GLSA-201606-10 (PHP: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in PHP. Please review the       CVE identifiers referenced below for details.
  Impact :

    An attacker can possibly execute arbitrary code or create a Denial of       Service condition.
  Workaround :

    There is no known workaround at this time.

03 Sep 2015, **PHP 5.6.13** **Core:** * Fixed bug #69900 (Too long timeout on pipes). (Anatol) * Fixed bug #69487 (SAPI may truncate POST data). (cmb) * Fixed bug #70198 (Checking liveness does not work as expected). (Shafreeck Sea, Anatol Belski) * Fixed bug #70172 (Use After Free Vulnerability in unserialize()). (Stas) * Fixed bug #70219 (Use after free vulnerability in session deserializer). (taoguangchen at icloud dot com) **CLI server:** * Fixed bug #66606 (Sets HTTP_CONTENT_TYPE but not CONTENT_TYPE). (wusuopu, cmb) * Fixed bug #70264 (CLI server directory traversal). (cmb) **Date:** * Fixed bug #70266 (DateInterval::__construct.interval_spec is not supposed to be optional). (cmb)

  - Fixed bug #70277 (new DateTimeZone($foo) is ignoring     text after null byte). (cmb) **EXIF:** * Fixed bug     #70385 (Buffer over-read in exif_read_data with TIFF IFD     tag byte value of 32 bytes). (Stas) **hash:** * Fixed     bug #70312 (HAVAL gives wrong hashes in specific cases).
    (letsgolee at naver dot com) **MCrypt:** * Fixed bug     #69833 (mcrypt fd caching not working). (Anatol)
    **Opcache:** * Fixed bug #70237 (Empty while and     do-while segmentation fault with opcode on CLI enabled).
    (Dmitry, Laruence) **PCRE:** * Fixed bug #70232     (Incorrect bump-along behavior with \K and empty string     match). (cmb) * Fixed bug #70345 (Multiple     vulnerabilities related to PCRE functions). (Anatol     Belski) **SOAP:** * Fixed bug #70388 (SOAP     serialize_function_call() type confusion / RCE). (Stas)
    **SPL:** * Fixed bug #70290 (NULL pointer deref     (segfault) in spl_autoload via ob_start). (hugh at     allthethings dot co dot nz) * Fixed bug #70303     (Incorrect constructor reflection for ArrayObject).
    (cmb) * Fixed bug #70365 (Use-after-free vulnerability     in unserialize() with SplObjectStorage). (taoguangchen     at icloud dot com) * Fixed bug #70366 (Use-after-free     vulnerability in unserialize() with     SplDoublyLinkedList). (taoguangchen at icloud dot com)
    **Standard:** * Fixed bug #70052 (getimagesize() fails     for very large and very small WBMP). (cmb) * Fixed bug     #70157 (parse_ini_string() segmentation fault with     INI_SCANNER_TYPED). (Tjerk) **XSLT:** * Fixed bug #69782     (NULL pointer dereference). (Stas)

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Use after free vulnerability was found in unserialize() function. We can create ZVAL and free it via Serializable::unserialize. However the unserialize() will still allow to use R: or r: to set references to that already freed memory. It is possible to use-after-free attack and execute arbitrary code remotely.

This update of PHP5 brings several security fixes.

Security fixes :

  - CVE-2015-6831: A use after free vulnerability in     unserialize() has been fixed which could be used to     crash php or potentially execute code. [bnc#942291]     [bnc#942294] [bnc#942295]

  - CVE-2015-6836: A SOAP serialize_function_call() type     confusion leading to remote code execution problem was     fixed. [bnc#945428]

  - CVE-2015-6837 CVE-2015-6838: Two NULL pointer     dereferences in the XSLTProcessor class were fixed.
    [bnc#945412]

It also includes a bugfix for the odbc module :

  - compare with SQL_NULL_DATA correctly [bnc#935074]

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to its banner, the version of PHP running on the remote web server is 5.4.x prior to 5.4.45. It is, therefore, affected by the following vulnerabilities :

  - A directory traversal vulnerability in the     ZipArchive::extractTo function in ext/zip/php_zip.c     could allow a remote attacker to create arbitrary     empty directories via a crafted ZIP archive.
    (CVE-2014-9767)

  - Multiple use-after-free memory errors exist related to     the unserialize() function. A remote attacker can     exploit these errors to execute arbitrary code.
    (CVE-2015-6834)

  - A use-after-free memory error exists related to the     php_var_unserialize() function. A remote attacker, using     a crafted serialize string, can exploit this to execute     arbitrary code. (CVE-2015-6835)

  - A type confusion error exists related to the     serialize_function_call() function due to improper     validation of the headers field. A remote attacker can     exploit this to have unspecified impact. (CVE-2015-6836)

  - Multiple flaws exist in the XSLTProcessor class due to     improper validation of input from the libxslt library. A     remote attacker can exploit thse flaws to have an     unspecified impact. (CVE-2015-6837, CVE-2015-6838)

  - A flaw exists in the php_zip_extract_file() function     in file php_zip.c due to improper sanitization of     user-supplied input. An unauthenticated, remote attacker     can exploit this to create arbitrary directories outside     of the restricted path.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

As reported upstream, A NULL pointer dereference flaw was found in the way PHP's Phar extension parsed Phar archives. A specially crafted archive could cause PHP to crash. (CVE-2015-7803 )

A flaw was discovered in the way PHP performed object unserialization.
Specially crafted input processed by the unserialize() function could cause a PHP application to crash or, possibly, execute arbitrary code.
(CVE-2015-6834 , CVE-2015-6835 , CVE-2015-6836)

A NULL pointer dereference flaw was found in the XSLTProcessor class in PHP. An attacker could use this flaw to cause a PHP application to crash if it performed Extensible Stylesheet Language (XSL) transformations using untrusted XSLT files and allowed the use of PHP functions to be used as XSLT functions within XSL stylesheets.
(CVE-2015-6837 , CVE-2015-6838)

As reported upstream, an uninitialized pointer use flaw was found in the phar_make_dirstream() function of PHP's Phar extension. A specially crafted phar file in the ZIP format with a directory entry with a file name '/ZIP' could cause a PHP application function to crash. (CVE-2015-7804)

ID	Name	Product	Family	Published	Updated	Severity
85914	Debian DSA-3358-1 : php5 - security update	Nessus	Debian Local Security Checks	9/14/2015	1/11/2021	critical
86794	Debian DLA-341-1 : php5 security update	Nessus	Debian Local Security Checks	11/9/2015	1/11/2021	critical
91704	GLSA-201606-10 : PHP: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	6/20/2016	1/11/2021	critical
86030	Fedora 23 : php-5.6.13-1.fc23 (2015-14978)	Nessus	Fedora Local Security Checks	9/21/2015	1/11/2021	critical
91433	F5 Networks BIG-IP : PHP vulnerabilities (SOL17377)	Nessus	F5 Networks Local Security Checks	6/2/2016	4/11/2019	critical
86616	SUSE SLES11 Security Update : php53 (SUSE-SU-2015:1818-1)	Nessus	SuSE Local Security Checks	10/27/2015	1/19/2021	high
85885	PHP 5.4.x < 5.4.45 Multiple Vulnerabilities	Nessus	CGI abuses	9/10/2015	5/26/2025	high
86495	Amazon Linux AMI : php56 (ALAS-2015-601)	Nessus	Amazon Linux Local Security Checks	10/22/2015	4/18/2018	critical

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