Use-after-free vulnerability in the SplObjectStorage unserializer in PHP 5.2.x and 5.3.x through 5.3.2 allows remote attackers to execute arbitrary code or obtain sensitive information via serialized data, related to the PHP unserialize function.

PHP was updated to version 5.3.3 to fix serveral security issues.

(CVE-2010-0397, CVE-2010-1860, CVE-2010-1862, CVE-2010-1864, CVE-2010-1866, CVE-2010-1914, CVE-2010-1915, CVE-2010-1917, CVE-2010-2093, CVE-2010-2094, CVE-2010-2097, CVE-2010-2100, CVE-2010-2101, CVE-2010-2190, CVE-2010-2191, CVE-2010-2225, CVE-2010-2531, CVE-2010-2950, CVE-2010-3062, CVE-2010-3063, CVE-2010-3064, CVE-2010-3065)

The remote host is affected by the vulnerability described in GLSA-201110-06 (PHP: Multiple vulnerabilities)

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

    A context-dependent attacker could execute arbitrary code, obtain       sensitive information from process memory, bypass intended access       restrictions, or cause a Denial of Service in various ways.
    A remote attacker could cause a Denial of Service in various ways,       bypass spam detections, or bypass open_basedir restrictions.
  Workaround :

    There is no known workaround at this time.

PHP was updated to version 5.2.14 to fix serveral security issues :

  - CVE-2010-1860

  - CVE-2010-1862

  - CVE-2010-1864

  - CVE-2010-1914

  - CVE-2010-1915

  - CVE-2010-1917

  - CVE-2010-2093

  - CVE-2010-2094

  - CVE-2010-2097

  - CVE-2010-2100

  - CVE-2010-2101

  - CVE-2010-2190

  - CVE-2010-2191

  - CVE-2010-2225

  - CVE-2010-2484

  - CVE-2010-2531

  - CVE-2010-3062

  - CVE-2010-3063

  - CVE-2010-3064

  - CVE-2010-3065

PHP was updated to version 5.2.14 to fix several security issues :

- [CVE-2010-1860](http://cve.mitre.org/cgi-bin/cvename.cgi?nam e=CVE-2010-1860)

- [CVE-2010-1862](http://cve.mitre.org/cgi-bin/cvename.cgi?nam e=CVE-2010-1862)

- [CVE-2010-1864](http://cve.mitre.org/cgi-bin/cvename.cgi?nam e=CVE-2010-1864)

- [CVE-2010-1914](http://cve.mitre.org/cgi-bin/cvename.cgi?nam e=CVE-2010-1914)

- [CVE-2010-1915](http://cve.mitre.org/cgi-bin/cvename.cgi?nam e=CVE-2010-1915)

- [CVE-2010-1917](http://cve.mitre.org/cgi-bin/cvename.cgi?nam e=CVE-2010-1917)

- [CVE-2010-2093](http://cve.mitre.org/cgi-bin/cvename.cgi?nam e=CVE-2010-2093)

- [CVE-2010-2094](http://cve.mitre.org/cgi-bin/cvename.cgi?nam e=CVE-2010-2094)

- [CVE-2010-2097](http://cve.mitre.org/cgi-bin/cvename.cgi?nam e=CVE-2010-2097)

- [CVE-2010-2100](http://cve.mitre.org/cgi-bin/cvename.cgi?nam e=CVE-2010-2100)

- [CVE-2010-2101](http://cve.mitre.org/cgi-bin/cvename.cgi?nam e=CVE-2010-2101)

- [CVE-2010-2190](http://cve.mitre.org/cgi-bin/cvename.cgi?nam e=CVE-2010-2190)

- [CVE-2010-2191](http://cve.mitre.org/cgi-bin/cvename.cgi?nam e=CVE-2010-2191)

- [CVE-2010-2225](http://cve.mitre.org/cgi-bin/cvename.cgi?nam e=CVE-2010-2225)

- [CVE-2010-2484](http://cve.mitre.org/cgi-bin/cvename.cgi?nam e=CVE-2010-2484)

- [CVE-2010-2531](http://cve.mitre.org/cgi-bin/cvename.cgi?nam e=CVE-2010-2531)

- [CVE-2010-3062](http://cve.mitre.org/cgi-bin/cvename.cgi?nam e=CVE-2010-3062)

- [CVE-2010-3063](http://cve.mitre.org/cgi-bin/cvename.cgi?nam e=CVE-2010-3063)

- [CVE-2010-3064](http://cve.mitre.org/cgi-bin/cvename.cgi?nam e=CVE-2010-3064)

- [CVE-2010-3065](http://cve.mitre.org/cgi-bin/cvename.cgi?nam e=CVE-2010-3065)

Auke van Slooten discovered that PHP incorrectly handled certain xmlrpc requests. An attacker could exploit this issue to cause the PHP server to crash, resulting in a denial of service. This issue only affected Ubuntu 6.06 LTS, 8.04 LTS, 9.04 and 9.10. (CVE-2010-0397)

It was discovered that the pseudorandom number generator in PHP did not provide the expected entropy. An attacker could exploit this issue to predict values that were intended to be random, such as session cookies. This issue only affected Ubuntu 6.06 LTS, 8.04 LTS, 9.04 and 9.10. (CVE-2010-1128)

It was discovered that PHP did not properly handle directory pathnames that lacked a trailing slash character. An attacker could exploit this issue to bypass safe_mode restrictions. This issue only affected Ubuntu 6.06 LTS, 8.04 LTS, 9.04 and 9.10. (CVE-2010-1129)

Grzegorz Stachowiak discovered that the PHP session extension did not properly handle semicolon characters. An attacker could exploit this issue to bypass safe_mode restrictions. This issue only affected Ubuntu 8.04 LTS, 9.04 and 9.10. (CVE-2010-1130)

Stefan Esser discovered that PHP incorrectly decoded remote HTTP chunked encoding streams. An attacker could exploit this issue to cause the PHP server to crash and possibly execute arbitrary code with application privileges. This issue only affected Ubuntu 10.04 LTS.
(CVE-2010-1866)

Mateusz Kocielski discovered that certain PHP SQLite functions incorrectly handled empty SQL queries. An attacker could exploit this issue to possibly execute arbitrary code with application privileges.
(CVE-2010-1868)

Mateusz Kocielski discovered that PHP incorrectly handled certain arguments to the fnmatch function. An attacker could exploit this flaw and cause the PHP server to consume all available stack memory, resulting in a denial of service. (CVE-2010-1917)

Stefan Esser discovered that PHP incorrectly handled certain strings in the phar extension. An attacker could exploit this flaw to possibly view sensitive information. This issue only affected Ubuntu 10.04 LTS.
(CVE-2010-2094, CVE-2010-2950)

Stefan Esser discovered that PHP incorrectly handled deserialization of SPLObjectStorage objects. A remote attacker could exploit this issue to view sensitive information and possibly execute arbitrary code with application privileges. This issue only affected Ubuntu 8.04 LTS, 9.04, 9.10 and 10.04 LTS. (CVE-2010-2225)

It was discovered that PHP incorrectly filtered error messages when limits for memory, execution time, or recursion were exceeded. A remote attacker could exploit this issue to possibly view sensitive information. (CVE-2010-2531)

Stefan Esser discovered that the PHP session serializer incorrectly handled the PS_UNDEF_MARKER marker. An attacker could exploit this issue to alter arbitrary session variables. (CVE-2010-3065).

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

New php packages are available for Slackware 11.0 (extra), 12.0, 12.1, 12.2, 13.0, 13.1, and -current to fix security issues.

The remote host is running a version of Mac OS X 10.6 or 10.5 that does not have Security Update 2010-005 applied. 

This security update contains fixes for the following products :

  - ATS
  - CFNetwork
  - ClamAV
  - CoreGraphics
  - libsecurity
  - PHP
  - Samba

Update to PHP 5.3.3 Security Enhancements and Fixes in PHP 5.3.3: * Rewrote var_export() to use smart_str rather than output buffering, prevents data disclosure if a fatal error occurs (CVE-2010-2531). * Fixed a possible resource destruction issues in shm_put_var(). * Fixed a possible information leak because of interruption of XOR operator. * Fixed a possible memory corruption because of unexpected call-time pass by refernce and following memory clobbering through callbacks. * Fixed a possible memory corruption in ArrayObject::uasort(). * Fixed a possible memory corruption in parse_str(). * Fixed a possible memory corruption in pack(). * Fixed a possible memory corruption in substr_replace(). * Fixed a possible memory corruption in addcslashes(). * Fixed a possible stack exhaustion inside fnmatch(). * Fixed a possible dechunking filter buffer overflow. * Fixed a possible arbitrary memory access inside sqlite extension. * Fixed string format validation inside phar extension. * Fixed handling of session variable serialization on certain prefix characters. * Fixed a NULL pointer dereference when processing invalid XML-RPC requests (Fixes CVE-2010-0397, bug #51288). * Fixed SplObjectStorage unserialization problems (CVE-2010-2225). * Fixed possible buffer overflows in mysqlnd_list_fields, mysqlnd_change_user. * Fixed possible buffer overflows when handling error packets in mysqlnd. Full upstream Changelog: http://www.php.net/ChangeLog-5.php#5.3.3

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.

Several remote vulnerabilities have been discovered in PHP 5, an hypertext preprocessor. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2010-1917     The fnmatch function can be abused to conduct denial of     service attacks (by crashing the interpreter) by the     means of a stack overflow.

  - CVE-2010-2225     The SplObjectStorage unserializer allows attackers to     execute arbitrary code via serialized data by the means     of a use-after-free vulnerability.

  - CVE-2010-3065     The default sessions serializer does not correctly     handle a special marker, which allows an attacker to     inject arbitrary variables into the session and possibly     exploit vulnerabilities in the unserializer.

  - CVE-2010-1128     For this vulnerability (predictable entropy for the     Linear Congruential Generator used to generate session     ids) we do not consider upstream's solution to be     sufficient. It is recommended to uncomment     the'session.entropy_file' and 'session.entropy_length'     settings in the php.ini files. Further improvements can     be achieved by setting'session.hash_function' to 1 (one)     and incrementing the value of'session.entropy_length'.

According to its banner, the version of PHP 5.3 installed on the remote host is older than 5.3.3.  Such versions may be affected by several security issues :

  - An error exists when processing invalid XML-RPC     requests that can lead to a NULL pointer     dereference. (bug #51288) (CVE-2010-0397)

  - An error exists in the function 'shm_put_var' that     is related to resource destruction.

  - An error exists in the function 'fnmatch' that can lead     to stack exhaustion. (CVE-2010-1917)

  - A memory corruption error exists related to call-time     pass by reference and callbacks.

  - The dechunking filter is vulnerable to buffer overflow.

  - An error exists in the sqlite extension that could     allow arbitrary memory access.

  - An error exists in the 'phar' extension related to     string format validation.

  - The functions 'mysqlnd_list_fields' and     'mysqlnd_change_user' are vulnerable to buffer overflow.

  - The Mysqlnd extension is vulnerable to buffer overflow     attack when handling error packets.

  - The following functions are not properly protected     against function interruptions :

    addcslashes, chunk_split, html_entity_decode,     iconv_mime_decode, iconv_substr, iconv_mime_encode,     htmlentities, htmlspecialchars, str_getcsv,     http_build_query, strpbrk, strtr, str_pad,     str_word_count, wordwrap, strtok, setcookie,     strip_tags, trim, ltrim, rtrim, substr_replace,     parse_str, pack, unpack, uasort, preg_match, strrchr     (CVE-2010-1860, CVE-2010-1862, CVE-2010-1864,     CVE-2010-2097, CVE-2010-2100, CVE-2010-2101,     CVE-2010-2190, CVE-2010-2191, CVE-2010-2484)

  - The following opcodes are not properly protected     against function interruptions :

    ZEND_CONCAT, ZEND_ASSIGN_CONCAT, ZEND_FETCH_RW, XOR     (CVE-2010-2191)

  - The default session serializer contains an error     that can be exploited when assigning session     variables having user defined names. Arbitrary     serialized values can be injected into sessions by     including the PS_UNDEF_MARKER, '!', character in     variable names.

  - A use-after-free error exists in the function     'spl_object_storage_attach'. (CVE-2010-2225)

  - An information disclosure vulnerability exists in the     function 'var_export' when handling certain error     conditions. (CVE-2010-2531)

According to its banner, the version of PHP 5.2 installed on the remote host is older than 5.2.14.  Such versions may be affected by several security issues :

  - An error exists when processing invalid XML-RPC     requests that can lead to a NULL pointer     dereference. (bug #51288) (CVE-2010-0397)

  - An error exists in the function 'fnmatch' that can lead     to stack exhaustion.

  - An error exists in the sqlite extension that could     allow arbitrary memory access.

  - A memory corruption error exists in the function     'substr_replace'.

  - The following functions are not properly protected     against function interruptions :

    addcslashes, chunk_split, html_entity_decode,     iconv_mime_decode, iconv_substr, iconv_mime_encode,     htmlentities, htmlspecialchars, str_getcsv,     http_build_query, strpbrk, strstr, str_pad,     str_word_count, wordwrap, strtok, setcookie,     strip_tags, trim, ltrim, rtrim, parse_str, pack, unpack,     uasort, preg_match, strrchr, strchr, substr, str_repeat     (CVE-2010-1860, CVE-2010-1862, CVE-2010-1864,     CVE-2010-2097, CVE-2010-2100, CVE-2010-2101,     CVE-2010-2190, CVE-2010-2191, CVE-2010-2484)

  - The following opcodes are not properly protected     against function interruptions :

    ZEND_CONCAT, ZEND_ASSIGN_CONCAT, ZEND_FETCH_RW     (CVE-2010-2191)

  - The default session serializer contains an error     that can be exploited when assigning session     variables having user defined names. Arbitrary     serialized values can be injected into sessions by     including the PS_UNDEF_MARKER, '!', character in     variable names.

  - A use-after-free error exists in the function     'spl_object_storage_attach'. (CVE-2010-2225)

  - An information disclosure vulnerability exists in the     function 'var_export' when handling certain error     conditions. (CVE-2010-2531)

This is a maintenance and security update that upgrades php to 5.3.3 for 2010.0/2010.1.

Security Enhancements and Fixes in PHP 5.3.3 :

  - Rewrote var_export() to use smart_str rather than output     buffering, prevents data disclosure if a fatal error     occurs (CVE-2010-2531).

  - Fixed a possible resource destruction issues in     shm_put_var().

    - Fixed a possible information leak because of       interruption of XOR operator.

  - Fixed a possible memory corruption because of unexpected     call-time pass by refernce and following memory     clobbering through callbacks.

  - Fixed a possible memory corruption in     ArrayObject::uasort().

    - Fixed a possible memory corruption in parse_str().

    - Fixed a possible memory corruption in pack().

    - Fixed a possible memory corruption in       substr_replace().

    - Fixed a possible memory corruption in addcslashes().

    - Fixed a possible stack exhaustion inside fnmatch().

    - Fixed a possible dechunking filter buffer overflow.

    - Fixed a possible arbitrary memory access inside sqlite       extension.

    - Fixed string format validation inside phar extension.

    - Fixed handling of session variable serialization on       certain prefix characters.

  - Fixed a NULL pointer dereference when processing invalid     XML-RPC requests (Fixes CVE-2010-0397, bug #51288).

  - Fixed SplObjectStorage unserialization problems     (CVE-2010-2225).

    - Fixed possible buffer overflows in       mysqlnd_list_fields, mysqlnd_change_user.

  - Fixed possible buffer overflows when handling error     packets in mysqlnd.

Additionally some of the third-party extensions and required dependencies has been upgraded and/or rebuilt for the new php version.

This is a maintenance and security update that upgrades php to 5.2.14 for CS4/MES5/2008.0/2009.0/2009.1.

Security Enhancements and Fixes in PHP 5.2.14 :

  - Rewrote var_export() to use smart_str rather than output     buffering, prevents data disclosure if a fatal error     occurs (CVE-2010-2531).

  - Fixed a possible interruption array leak in     strrchr().(CVE-2010-2484)

  - Fixed a possible interruption array leak in strchr(),     strstr(), substr(), chunk_split(), strtok(),     addcslashes(), str_repeat(), trim().

  - Fixed a possible memory corruption in substr_replace().

    - Fixed SplObjectStorage unserialization problems       (CVE-2010-2225).

    - Fixed a possible stack exaustion inside fnmatch().

    - Fixed a NULL pointer dereference when processing       invalid XML-RPC requests (Fixes CVE-2010-0397, bug       #51288).

  - Fixed handling of session variable serialization on     certain prefix characters.

  - Fixed a possible arbitrary memory access inside sqlite     extension. Reported by Mateusz Kocielski.

Additionally some of the third-party extensions has been upgraded and/or rebuilt for the new php version.

Packages for 2008.0 and 2009.0 are provided as of the Extended Maintenance Program. Please visit this link to learn more:
http://store.mandriva.com/product_info.php?cPath=149&amp;products_id=4 90

According to its banner the version of PHP installed on the remote host is earlier than 5.3.3 / 5.2.14.  Such version are potentially affected by multiple vulnerabilities :

  - An information disclosure vulnerability in var_export() when a fatal error occurs.

  - A resource destruction issue in shm_put_var().

  - A possible information leak because of an interruption of XOR operator.

  - A memory corruption issue caused by an unexpected call-time pass by reference and the following memory clobbering through callbacks.

  - A memory corruption issue in ArrayObject::uasort().

  - A memory corruption issue in parse_str().

  - A memory corruption issue in pack().

  - A memory corruption issue in substr_replace().

  - A memory corruption issue in addcslashes().

  - A stack exhaustion issue in fnmatch().

  - A buffer overflow vulnerability in the dechunking filter.

  - An arbitrary memory access issue in the sqlite extension.

  - A string format validation issue in the phar extension.

  - An unspecified issue relating to the handling of session variable serialization on certain prefix characters.

  - A NULL pointer dereference issue when processing invalid XML-RPC requests.

  - An unserialization issue in SplObjectStorage.

  - Buffer overflow vulnerabilities in mysqlnd_list_fields and mysqlnd_change_user.

  - Buffer overflows when handling error packets in mysqlnd.

Versions of PHP prior to 5.2.14, or 5.3.x prior to 5.3.3 are affected by the following vulnerabilities :

 - An information disclosure vulnerability in 'var_export()' when a fatal error occurs.
 - A resource destruction issue in 'shm_put_var()'.
 - A possible information leak because of an interruption of XOR operator.
 - A memory corruption issue caused by an unexpected call-time pass by reference and the following memory clobbering through callbacks.
 - A memory corruption issue in 'ArrayObject::uasort()'.
 - A memory corruption issue in 'parse_str()'.
 - A memory corruption issue in 'pack()'.
 - A memory corruption issue in 'substr_replace()'.
 - A memory corruption issue in 'addcslashes()'.
 - A stack exhaustion issue in 'fnmatch()'.
 - A buffer overflow vulnerability in the dechunking filter.
 - An arbitrary memory access issue in the sqlite extension.
 - A string format validation issue in the phar extension.
 - An unspecified issue relating to the handling of session variable serialization on certain prefix characters.
 - A NULL pointer dereference issue when processing invalid XML-RPC requests.
 - An unserialization issue in 'SplObjectStorage'.
 - Buffer overflow vulnerabilities in 'mysqlnd_list_fields' and 'mysqlnd_change_user'.
 - Buffer overflows when handling error packets in mysqlnd.
 - A flaw affects 'sqlite_single_query()' and 'sqlite_array_query()' methods included in the 'ext/sqlite/sqlite.c' source file. Specifically, the 'rres' resource is not properly initialized before use which may trigger a double-free condition when an empty query is passed to the 'real_result_dtor()' function.

ID	Name	Product	Family	Severity
75429	openSUSE Security Update : apache2-mod_php5 (openSUSE-SU-2010:0599-1)	Nessus	SuSE Local Security Checks	high
56459	GLSA-201110-06 : PHP: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	critical
50890	SuSE 11 / 11.1 Security Update : Apache 2 (SAT Patch Numbers 2880 / 2881)	Nessus	SuSE Local Security Checks	high
49830	SuSE 10 Security Update : Linux kernel (ZYPP Patch Number 7110)	Nessus	SuSE Local Security Checks	high
49752	openSUSE Security Update : apache2-mod_php5 (openSUSE-SU-2010:0678-1)	Nessus	SuSE Local Security Checks	high
49306	Ubuntu 6.06 LTS / 8.04 LTS / 9.04 / 9.10 / 10.04 LTS : php5 vulnerabilities (USN-989-1)	Nessus	Ubuntu Local Security Checks	high
49210	openSUSE Security Update : apache2-mod_php5 (openSUSE-SU-2010:0599-1)	Nessus	SuSE Local Security Checks	high
48921	Slackware 11.0 / 12.0 / 12.1 / 12.2 / 13.0 / 13.1 / current : php (SSA:2010-240-04)	Nessus	Slackware Local Security Checks	high
48424	Mac OS X Multiple Vulnerabilities (Security Update 2010-005)	Nessus	MacOS X Local Security Checks	high
48412	Fedora 13 : maniadrive-1.2-22.fc13 / php-5.3.3-1.fc13 / php-eaccelerator-0.9.6.1-2.fc13 (2010-11481)	Nessus	Fedora Local Security Checks	high
48411	Fedora 12 : maniadrive-1.2-22.fc12 / php-5.3.3-1.fc12 / php-eaccelerator-0.9.6.1-2.fc12 (2010-11428)	Nessus	Fedora Local Security Checks	high
48384	Debian DSA-2089-1 : php5 - several vulnerabilities	Nessus	Debian Local Security Checks	high
48245	PHP 5.3 < 5.3.3 Multiple Vulnerabilities	Nessus	CGI abuses	high
48244	PHP 5.2 < 5.2.14 Multiple Vulnerabilities	Nessus	CGI abuses	high
48198	Mandriva Linux Security Advisory : php (MDVSA-2010:140)	Nessus	Mandriva Local Security Checks	high
48197	Mandriva Linux Security Advisory : php (MDVSA-2010:139)	Nessus	Mandriva Local Security Checks	high
801070	PHP < 5.3.3 / 5.2.14 Multiple Vulnerabilities	Log Correlation Engine	Web Servers	high
5616	PHP < 5.2.14 / 5.3.x < 5.3.3 Multiple Vulnerabilities	Nessus Network Monitor	Web Servers	high

Detections

Analytics

CVE-2010-2225

critical

Tenable Plugins

high

critical

high

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high

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high