Integer overflow in memory allocation routines in PHP before 5.1.6, when running on a 64-bit system, allows context-dependent attackers to bypass the memory_limit restriction.

Updated PHP packages that fix a security issue are now available. 

This update has been rated as having important security impact by the Red Hat Security Response Team. 

PHP is an HTML-embedded scripting language commonly used with the Apache HTTP Web server. 

Users of PHP should upgrade to these updated packages which contain backported patches to correct these issues.  These packages also contain a fix for a bug where certain input strings to the metaphone() function could cause memory corruption. 


From Red Hat Security Advisory 2006:0730 :

The Hardened-PHP Project discovered an overflow in the PHP htmlentities() and htmlspecialchars() routines. If a PHP script used the vulnerable functions to parse UTF-8 data, a remote attacker sending a carefully crafted request could trigger the overflow and potentially execute arbitrary code as the 'apache' user.
(CVE-2006-5465)


From Red Hat Security Advisory 2006:0669 :

A response-splitting issue was discovered in the PHP session handling.
If a remote attacker can force a carefully crafted session identifier to be used, a cross-site-scripting or response-splitting attack could be possible. (CVE-2006-3016)

A buffer overflow was discovered in the PHP sscanf() function. If a script used the sscanf() function with positional arguments in the format string, a remote attacker sending a carefully crafted request could execute arbitrary code as the 'apache' user. (CVE-2006-4020)

An integer overflow was discovered in the PHP wordwrap() and str_repeat() functions. If a script running on a 64-bit server used either of these functions on untrusted user data, a remote attacker sending a carefully crafted request might be able to cause a heap overflow. (CVE-2006-4482)

A buffer overflow was discovered in the PHP gd extension. If a script was set up to process GIF images from untrusted sources using the gd extension, a remote attacker could cause a heap overflow.
(CVE-2006-4484)

An integer overflow was discovered in the PHP memory allocation handling. On 64-bit platforms, the 'memory_limit' setting was not enforced correctly, which could allow a denial of service attack by a remote user. (CVE-2006-4486)

 According to its banner, the version of PHP 5.x installed on the remote host is older than 5.2.0.  Such versions may be affected by several buffer overflows To exploit these issues, an attacker would need the ability to upload an arbitrary PHP script to the remote server, or to be able to manipulate several variables processed by some PHP functions such as htmlentities(). 

According to its banner, the version of PHP 5.x installed on the remote host is older than 5.2.  Such versions may be affected by several buffer overflows. 

To exploit these issues, an attacker would need the ability to upload an arbitrary PHP script on the remote server or to manipulate several variables processed by some PHP functions such as 'htmlentities().'

The stripos() function did not check for invalidly long or empty haystack strings. In an application that uses this function on arbitrary untrusted data this could be exploited to crash the PHP interpreter. (CVE-2006-4485)

An integer overflow was discovered in the PHP memory allocation handling. On 64-bit platforms, the 'memory_limit' setting was not enforced correctly. A remote attacker could exploit this to cause a Denial of Service attack through memory exhaustion. (CVE-2006-4486)

Maksymilian Arciemowicz discovered that security relevant configuration options like open_basedir and safe_mode (which can be configured in Apache's httpd.conf) could be bypassed and reset to their default value in php.ini by using the ini_restore() function.
(CVE-2006-4625)

Stefan Esser discovered that the ecalloc() function in the Zend engine did not check for integer overflows. This particularly affected the unserialize() function. In applications which unserialize untrusted user-defined data, this could be exploited to execute arbitrary code with the application's privileges. (CVE-2006-4812).

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.

Several remote vulnerabilities have been discovered in PHP, a server-side, HTML-embedded scripting language, which may lead to the execution of arbitrary code. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2006-0207     Stefan Esser discovered HTTP response splitting     vulnerabilities in the session extension. This only     affects Debian 3.1 (Sarge).

  - CVE-2006-4486     Stefan Esser discovered that an integer overflow in     memory allocation routines allows the bypass of memory     limit restrictions. This only affects Debian 3.1 (Sarge)     on 64 bit architectures.

  - CVE-2007-1864     It was discovered that a buffer overflow in the xmlrpc     extension allows the execution of arbitrary code.

The remote host is running a version of PHP that is older than 4.4.4 or 5.1.5.  This version is reported vulnerable to several flaws that may allow an attacker with the right to execute PHP scripts the ability to execute arbitrary code.  Executed code would be run with the permissions of the web server process. 

Updated PHP packages that fix multiple security issues are now available for Red Hat Enterprise Linux 2.1.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

PHP is an HTML-embedded scripting language commonly used with the Apache HTTP Web server.

A response-splitting issue was discovered in the PHP session handling.
If a remote attacker can force a carefully crafted session identifier to be used, a cross-site-scripting or response-splitting attack could be possible. (CVE-2006-3016)

A buffer overflow was discovered found in the PHP sscanf() function.
If a script used the sscanf() function with positional arguments in the format string, a remote attacker sending a carefully crafted request could execute arbitrary code as the 'apache' user.
(CVE-2006-4020)

An integer overflow was discovered in the PHP wordwrap() and str_repeat() functions. If a script running on a 64-bit server used either of these functions on untrusted user data, a remote attacker sending a carefully crafted request might be able to cause a heap overflow. (CVE-2006-4482)

An integer overflow was discovered in the PHP memory allocation handling. On 64-bit platforms, the 'memory_limit' setting was not enforced correctly, which could allow a denial of service attack by a remote user. (CVE-2006-4486)

Users of PHP should upgrade to these updated packages which contain backported patches to correct these issues. These packages also contain a fix for a bug where certain input strings to the metaphone() function could cause memory corruption.

Updated PHP packages that fix multiple security issues are now available for Red Hat Enterprise Linux 3 and 4.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

PHP is an HTML-embedded scripting language commonly used with the Apache HTTP Web server.

A response-splitting issue was discovered in the PHP session handling.
If a remote attacker can force a carefully crafted session identifier to be used, a cross-site-scripting or response-splitting attack could be possible. (CVE-2006-3016)

A buffer overflow was discovered in the PHP sscanf() function. If a script used the sscanf() function with positional arguments in the format string, a remote attacker sending a carefully crafted request could execute arbitrary code as the 'apache' user. (CVE-2006-4020)

An integer overflow was discovered in the PHP wordwrap() and str_repeat() functions. If a script running on a 64-bit server used either of these functions on untrusted user data, a remote attacker sending a carefully crafted request might be able to cause a heap overflow. (CVE-2006-4482)

A buffer overflow was discovered in the PHP gd extension. If a script was set up to process GIF images from untrusted sources using the gd extension, a remote attacker could cause a heap overflow.
(CVE-2006-4484)

An integer overflow was discovered in the PHP memory allocation handling. On 64-bit platforms, the 'memory_limit' setting was not enforced correctly, which could allow a denial of service attack by a remote user. (CVE-2006-4486)

Users of PHP should upgrade to these updated packages which contain backported patches to correct these issues. These packages also contain a fix for a bug where certain input strings to the metaphone() function could cause memory corruption.

The PHP development team reports :

- Added missing safe_mode/open_basedir checks inside the error_log(), file_exists(), imap_open() and imap_reopen() functions.

- Fixed overflows inside str_repeat() and wordwrap() functions on 64bit systems.

- Fixed possible open_basedir/safe_mode bypass in cURL extension and with realpath cache.

- Fixed overflow in GD extension on invalid GIF images.

- Fixed a buffer overflow inside sscanf() function.

- Fixed an out of bounds read inside stripos() function.

- Fixed memory_limit restriction on 64 bit system.

Multiple buffer overflows in the gd graphics library (libgd) 2.0.21 and earlier may allow remote attackers to execute arbitrary code via malformed image files that trigger the overflows due to improper calls to the gdMalloc function. One instance in gd_io_dp.c does not appear to be corrected in the embedded copy of GD used in php to build the php-gd package. (CVE-2004-0941)

Integer overflows were reported in the GD Graphics Library (libgd) 2.0.28, and possibly other versions. These overflows allow remote attackers to cause a denial of service and possibly execute arbitrary code via PNG image files with large image rows values that lead to a heap-based buffer overflow in the gdImageCreateFromPngCtx() function.
PHP, as packaged in Mandriva Linux, contains an embedded copy of the GD library, used to build the php-gd package. (CVE-2004-0990)

The c-client library 2000, 2001, or 2004 for PHP 3.x, 4.x, and 5.x, when used in applications that accept user-controlled input for the mailbox argument to the imap_open function, allow remote attackers to obtain access to an IMAP stream data structure and conduct unauthorized IMAP actions. (CVE-2006-1017)

Integer overflow in the wordwrap function in string.c in might allow context-dependent attackers to execute arbitrary code via certain long arguments that cause a small buffer to be allocated, which triggers a heap-based buffer overflow in a memcpy function call, a different vulnerability than CVE-2002-1396. (CVE-2006-1990) The previous update for this issue did not resolve the issue on 64bit platforms.

The cURL library (libcurl) in PHP 4.4.2 and 5.1.4 allows attackers to bypass safe mode and read files via a file:// request containing nul characters. (CVE-2006-2563)

Buffer consumption vulnerability in the tempnam function in PHP 5.1.4 and 4.x before 4.4.3 allows local users to bypass restrictions and create PHP files with fixed names in other directories via a pathname argument longer than MAXPATHLEN, which prevents a unique string from being appended to the filename. (CVE-2006-2660)

The LZW decoding in the gdImageCreateFromGifPtr function in the Thomas Boutell graphics draw (GD) library (aka libgd) 2.0.33 allows remote attackers to cause a denial of service (CPU consumption) via malformed GIF data that causes an infinite loop. PHP, as packaged in Mandriva Linux, contains an embedded copy of the GD library, used to build the php-gd package. (CVE-2006-2906)

The error_log function in PHP allows local users to bypass safe mode and open_basedir restrictions via a 'php://' or other scheme in the third argument, which disables safe mode. (CVE-2006-3011)

An unspecified vulnerability in session.c in PHP before 5.1.3 has unknown impact and attack vectors, related to 'certain characters in session names', including special characters that are frequently associated with CRLF injection, SQL injection, and cross-site scripting (XSS) vulnerabilities. NOTE: while the nature of the vulnerability is unspecified, it is likely that this is related to a violation of an expectation by PHP applications that the session name is alphanumeric, as implied in the PHP manual for session_name().
(CVE-2006-3016)

An unspecified vulnerability in PHP before 5.1.3 can prevent a variable from being unset even when the unset function is called, which might cause the variable's value to be used in security-relevant operations. (CVE-2006-3017)

An unspecified vulnerability in the session extension functionality in PHP before 5.1.3 has unkown impact and attack vectors related to heap corruption. (CVE-2006-3018)

Multiple heap-based buffer overflows in the (1) str_repeat and (2) wordwrap functions in ext/standard/string.c in PHP before 5.1.5, when used on a 64-bit system, have unspecified impact and attack vectors, a different vulnerability than CVE-2006-1990. (CVE-2006-4482)

The cURL extension files (1) ext/curl/interface.c and (2) ext/curl/streams.c in PHP before 5.1.5 permit the CURLOPT_FOLLOWLOCATION option when open_basedir or safe_mode is enabled, which allows attackers to perform unauthorized actions, possibly related to the realpath cache. (CVE-2006-4483)

Unspecified vulnerability in PHP before 5.1.6, when running on a 64-bit system, has unknown impact and attack vectors related to the memory_limit restriction. (CVE-2006-4486)

The GD related issues (CVE-2004-0941, CVE-2004-0990, CVE-2006-2906) affect only Corporate 3 and Mandrake Network Firewall 2.

The php-curl issues (CVE-2006-2563, CVE-2006-4483) affect only Mandriva 2006.0.

Updated packages have been patched to address all these issues. Once these packages have been installed, you will need to restart Apache (service httpd restart) in order for the changes to take effect.

The remote host is running a version of PHP that is older than 4.4.4 or 5.1.5.  This version is reported vulnerable to several flaws that may allow an attacker with the right to execute PHP scripts the ability to execute arbitrary code.  Executed code would be run with the permissions of the web server process.

ID	Name	Product	Family	Severity
67421	Oracle Linux 4 : php (ELSA-2006-0730 / ELSA-2006-0669)	Nessus	Oracle Linux Local Security Checks	high
4444	PHP 5.x < 5.2.0 Multiple Vulnerabilities	Nessus Network Monitor	Web Servers	high
31649	PHP 5.x < 5.2 Multiple Vulnerabilities	Nessus	CGI abuses	high
27942	Ubuntu 5.04 / 5.10 / 6.06 LTS : php4, php5 vulnerabilities (USN-362-1)	Nessus	Ubuntu Local Security Checks	critical
25678	Debian DSA-1331-1 : php4 - several vulnerabilities	Nessus	Debian Local Security Checks	high
3732	PHP 4.x < 4.4.4 / 5.x < 5.1.4 Multiple Vulnerabilities	Nessus Network Monitor	Web Servers	medium
22444	RHEL 2.1 : php (RHSA-2006:0682)	Nessus	Red Hat Local Security Checks	high
22443	RHEL 3 / 4 : php (RHSA-2006:0669)	Nessus	Red Hat Local Security Checks	high
22423	CentOS 3 / 4 : php (CESA-2006:0669)	Nessus	CentOS Local Security Checks	high
22343	FreeBSD : php -- multiple vulnerabilities (ea09c5df-4362-11db-81e1-000e0c2e438a)	Nessus	FreeBSD Local Security Checks	critical
22053	Mandrake Linux Security Advisory : php (MDKSA-2006:122)	Nessus	Mandriva Local Security Checks	critical
801073	PHP < 4.4.4 / 5.1.4 Multiple Vulnerabilities	Log Correlation Engine	Web Servers	high

Detections

Analytics

CVE-2006-4486

critical

Tenable Plugins

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