Buffer overflow in the LWZReadByte_ function in ext/gd/libgd/gd_gif_in.c in the GD extension in PHP before 5.1.5 allows remote attackers to have an unknown impact via a GIF file with input_code_size greater than MAX_LWZ_BITS, which triggers an overflow when initializing the table array.

The remote Oracle Linux 5 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2008-0146 advisory.

    [2.0.28-5.E4.1]
     - security fixes
     - Resolves: #432784

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

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

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)

Multiple issues were discovered in the gd GIF image-handling code. A carefully-crafted GIF file could cause a crash or possibly execute code with the privileges of the application using the gd library.
(CVE-2006-4484, CVE-2007-3475, CVE-2007-3476)

An integer overflow was discovered in the gdImageCreateTrueColor() function, leading to incorrect memory allocations. A carefully crafted image could cause a crash or possibly execute code with the privileges of the application using the gd library. (CVE-2007-3472)

A buffer over-read flaw was discovered. This could cause a crash in an application using the gd library to render certain strings using a JIS-encoded font. (CVE-2007-0455)

A flaw was discovered in the gd PNG image handling code. A truncated PNG image could cause an infinite loop in an application using the gd library. (CVE-2007-2756)

A flaw was discovered in the gd X BitMap (XBM) image-handling code. A malformed or truncated XBM image could cause a crash in an application using the gd library. (CVE-2007-3473)

According to its banner, the version of PHP 5.x installed on the remote host is older than 5.1.5.  Such versions may be affected by the following vulnerabilities :

  - The c-client library 2000, 2001, or 2004 for PHP does     not check the safe_mode or open_basedir functions.
    (CVE-2006-1017)

  - A buffer overflow exists in the sscanf function.
    (CVE-2006-4020)

  - The file_exists and imap_reopen functions do not check     for the safe_mode and open_basedir settings, which     allows local users to bypass the settings.     (CVE-2006-4481)

  - Multiple heap-based buffer overflows exist in the     str_repeat and wordwrap functions in     ext/standard/string.c. (CVE-2006-4482)

  - The cURL extension files permit the     CURLOPT_FOLLOWLOCATION option when open_basedir or     safe_mode is enabled, which allows attackers to perform     unauthorized actions. (CVE-2006-4483)

  - A buffer overflow vulnerability exists in the     LWZReadByte_ function in ext/gd/libgd/gd_gif_in.c in the     GD extension. (CVE-2006-4484)

  - The stripos function is affected by an out-of-bounds     read. (CVE-2006-4485)

Specially crafted GIF files could crash perl-Tk. (CVE-2006-4484)

Buffer overflow in the LWZReadByte() function in gd_gif_in.c in GD prior to 2.0.34 allows remote attackers to have an unknown impact via a GIF file with input_code_size greater than MAX_LWZ_BITS, which triggers an overflow when initializing the table array.

This was originally fixed in PHP's embedded GD with MDKSA-2006:162;
patches had not been applied to the system libgd at that time.

The updated packages have been patched to correct this issue.

A vulnerability in perl-Tk was found where specially crafted GIF images could crash perl-Tk (an identical issue to that found in php-gd, gd, and SDL_image).

The updated packages have been patched to correct this issue.

This update fixes two vulnerabilities while parsing GIF images.
(CVE-2008-0553, CVE-2006-4484)

Specially crafted GIF files could crash perl-Tk (CVE-2006-4484).

Updated gd packages that fix multiple security issues are now available for Red Hat Enterprise Linux 4 and 5.

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

The gd package contains a graphics library used for the dynamic creation of images such as PNG and JPEG.

Multiple issues were discovered in the gd GIF image-handling code. A carefully-crafted GIF file could cause a crash or possibly execute code with the privileges of the application using the gd library.
(CVE-2006-4484, CVE-2007-3475, CVE-2007-3476)

An integer overflow was discovered in the gdImageCreateTrueColor() function, leading to incorrect memory allocations. A carefully crafted image could cause a crash or possibly execute code with the privileges of the application using the gd library. (CVE-2007-3472)

A buffer over-read flaw was discovered. This could cause a crash in an application using the gd library to render certain strings using a JIS-encoded font. (CVE-2007-0455)

A flaw was discovered in the gd PNG image handling code. A truncated PNG image could cause an infinite loop in an application using the gd library. (CVE-2007-2756)

A flaw was discovered in the gd X BitMap (XBM) image-handling code. A malformed or truncated XBM image could cause a crash in an application using the gd library. (CVE-2007-3473)

Users of gd should upgrade to these updated packages, which contain backported patches which resolve these issues.

Rebuilt to utilize system gd instead of internal copy.

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.

Specially crafted GIF files could crash the SDL_image library (CVE-2006-4484).

The sscanf() function did not properly check array boundaries. In applications which use sscanf() with argument swapping, a remote attacker could potentially exploit this to crash the affected web application or even execute arbitrary code with the application's privileges. (CVE-2006-4020)

The file_exists() and imap_reopen() functions did not perform proper open_basedir and safe_mode checks which could allow local scripts to bypass intended restrictions. (CVE-2006-4481)

On 64 bit systems the str_repeat() and wordwrap() functions did not properly check buffer boundaries. Depending on the application, this could potentially be exploited to execute arbitrary code with the applications' privileges. This only affects the amd64 and sparc platforms. (CVE-2006-4482)

A buffer overflow was discovered in the LWZReadByte_() function of the GIF image file parser. By tricking a PHP application into processing a specially crafted GIF image, a remote attacker could exploit this to execute arbitrary code with the application's privileges.
(CVE-2006-4484).

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.

The (1) file_exists and (2) imap_reopen functions in PHP before 5.1.5 do not check for the safe_mode and open_basedir settings, which allows local users to bypass the settings (CVE-2006-4481).

Buffer overflow in the LWZReadByte function in ext/gd/libgd/gd_gif_in.c in the GD extension in PHP before 5.1.5 allows remote attackers to have an unknown impact via a GIF file with input_code_size greater than MAX_LWZ_BITS, which triggers an overflow when initializing the table array (CVE-2006-4484).

The stripos function in PHP before 5.1.5 has unknown impact and attack vectors related to an out-of-bounds read (CVE-2006-4485).

CVE-2006-4485 does not affect the Corporate3 or MNF2 versions of PHP.

Updated packages have been patched to correct these issues.

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 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.

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
67657	Oracle Linux 5 : Moderate: / gd (ELSA-2008-0146)	Nessus	Oracle Linux Local Security Checks	high
67421	Oracle Linux 4 : php (ELSA-2006-0730 / ELSA-2006-0669)	Nessus	Oracle Linux Local Security Checks	high
60367	Scientific Linux Security Update : gd on SL4.x, SL5.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	high
17713	PHP 5.1.x < 5.1.5 Multiple Vulnerabilities	Nessus	CGI abuses	critical
41199	SuSE9 Security Update : perl-Tk (YOU Patch Number 12093)	Nessus	SuSE Local Security Checks	low
37016	Mandriva Linux Security Advisory : gd (MDVSA-2008:038)	Nessus	Mandriva Local Security Checks	low
36248	Mandriva Linux Security Advisory : perl-Tk (MDVSA-2008:077)	Nessus	Mandriva Local Security Checks	low
33123	openSUSE 10 Security Update : tkimg (tkimg-5328)	Nessus	SuSE Local Security Checks	medium
33122	openSUSE 10 Security Update : tkimg (tkimg-5320)	Nessus	SuSE Local Security Checks	medium
31340	openSUSE 10 Security Update : perl-Tk (perl-Tk-5035)	Nessus	SuSE Local Security Checks	low
31339	SuSE 10 Security Update : perl-Tk (ZYPP Patch Number 5034)	Nessus	SuSE Local Security Checks	low
31310	CentOS 4 / 5 : gd (CESA-2008:0146)	Nessus	CentOS Local Security Checks	high
31306	RHEL 4 / 5 : gd (RHSA-2008:0146)	Nessus	Red Hat Local Security Checks	high
31079	Fedora 7 : graphviz-2.12-10.fc7 (2008-1643)	Nessus	Fedora Local Security Checks	low
30141	openSUSE 10 Security Update : SDL_image (SDL_image-4956)	Nessus	SuSE Local Security Checks	low
27921	Ubuntu 5.04 / 5.10 / 6.06 LTS : php4, php5 vulnerabilities (USN-342-1)	Nessus	Ubuntu Local Security Checks	high
23906	Mandrake Linux Security Advisory : php (MDKSA-2006:162)	Nessus	Mandriva Local Security Checks	critical
3732	PHP 4.x < 4.4.4 / 5.x < 5.1.4 Multiple Vulnerabilities	Nessus Network Monitor	Web Servers	medium
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
801073	PHP < 4.4.4 / 5.1.4 Multiple Vulnerabilities	Log Correlation Engine	Web Servers	high

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CVE-2006-4484

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