This Update fixes numerous vulnerabilities in PHP. Most of them were made public during the 'Month of PHP Bugs'. The vulnerabilities potentially lead to crashes, information leaks or even execution of malicious code.

CVE-2007-1380, CVE-2007-0988, CVE-2007-1375, CVE-2007-1454 CVE-2007-1453, CVE-2007-1521, CVE-2007-1522, CVE-2007-1376 CVE-2007-1583, CVE-2007-1460, CVE-2007-1461, CVE-2007-1484 CVE-2007-1700, CVE-2007-1717, CVE-2007-1718, CVE-2007-1001 CVE-2007-1824, CVE-2007-1889, CVE-2007-1900

According to its banner, the version of PHP installed on the remote host is older than 4.4.7 / 5.2.2.  Such versions may be affected by several issues, including buffer overflows in the GD library.

Numerous vulnerabilities were discovered in the PHP scripting language that are corrected with this update.

An integer overflow in the substr_compare() function allows context-dependent attackers to read sensitive memory via a large value in the length argument. This only affects PHP5 (CVE-2007-1375).

A stack-based buffer overflow in the zip:// URI wrapper in PECL ZIP 1.8.3 and earlier allowes remote attackers to execute arbitrary code via a long zip:// URL. This only affects Corporate Server 4.0 (CVE-2007-1399).

A CRLF injection vulnerability in the FILTER_VALIDATE_EMAIL filter could allow an attacker to inject arbitrary email headers via a special email address. This only affects Mandriva Linux 2007.1 (CVE-2007-1900).

The mcrypt_create_iv() function calls php_rand_r() with an uninitialized seed variable, thus always generating the same initialization vector, which may allow an attacker to decrypt certain data more easily because of the guessable encryption keys (CVE-2007-2727).

The soap extension calls php_rand_r() with an uninitialized seec variable, which has unknown impact and attack vectors; an issue similar to that affecting mcrypt_create_iv(). This only affects PHP5 (CVE-2007-2728).

The substr_count() function allows attackers to obtain sensitive information via unspecified vectors. This only affects PHP5 (CVE-2007-2748).

An infinite loop was found in the gd extension that could be used to cause a denial of service if a script were forced to process certain PNG images from untrusted sources (CVE-2007-2756).

An integer overflow flaw was found in the chunk_split() function that ould possibly execute arbitrary code as the apache user if a remote attacker was able to pass arbitrary data to the third argument of chunk_split() (CVE-2007-2872).

A flaw in the PHP session cookie handling could allow an attacker to create a cross-site cookie insertion attack if a victim followed an untrusted carefully-crafted URL (CVE-2007-3799).

Various integer overflow flaws were discovered in the PHP gd extension that could allow a remote attacker to execute arbitrary code as the apache user (CVE-2007-3996).

A flaw in the wordwrap() frunction could result in a denial of ervice if a remote attacker was able to pass arbitrary data to the function (CVE-2007-3998).

A flaw in the money_format() function could result in an information leak or denial of service if a remote attacker was able to pass arbitrary data to this function; this situation would be unlikely however (CVE-2007-4658).

A bug in the PHP session cookie handling could allow an attacker to stop a victim from viewing a vulnerable website if the victim first visited a malicious website under the control of the attacker who was able to use that page to set a cookie for the vulnerable website (CVE-2007-4670).

Updated packages have been patched to prevent these issues. In addition, PECL ZIP version 1.8.10 is being provided for Corporate Server 4.0.

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-2007-1286     Stefan Esser discovered an overflow in the object     reference handling code of the unserialize() function,     which allows the execution of arbitrary code if     malformed input is passed from an application.

  - CVE-2007-1375     Stefan Esser discovered that an integer overflow in the     substr_compare() function allows information disclosure     of heap memory.

  - CVE-2007-1376     Stefan Esser discovered that insufficient validation of     shared memory functions allows the disclosure of heap     memory.

  - CVE-2007-1380     Stefan Esser discovered that the session handler     performs insufficient validation of variable name length     values, which allows information disclosure through a     heap information leak.

  - CVE-2007-1453     Stefan Esser discovered that the filtering framework     performs insufficient input validation, which allows the     execution of arbitrary code through a buffer underflow.

  - CVE-2007-1454     Stefan Esser discovered that the filtering framework can     be bypassed with a special whitespace character.

  - CVE-2007-1521     Stefan Esser discovered a double free vulnerability in     the session_regenerate_id() function, which allows the     execution of arbitrary code.

  - CVE-2007-1583     Stefan Esser discovered that a programming error in the     mb_parse_str() function allows the activation of     'register_globals'.

  - CVE-2007-1700     Stefan Esser discovered that the session extension     incorrectly maintains the reference count of session     variables, which allows the execution of arbitrary code.

  - CVE-2007-1711     Stefan Esser discovered a double free vulnerability in     the session management code, which allows the execution     of arbitrary code.

  - CVE-2007-1718     Stefan Esser discovered that the mail() function     performs insufficient validation of folded mail headers,     which allows mail header injection.

  - CVE-2007-1777     Stefan Esser discovered that the extension to handle ZIP     archives performs insufficient length checks, which     allows the execution of arbitrary code.

  - CVE-2007-1824     Stefan Esser discovered an off-by-one error in the     filtering framework, which allows the execution of     arbitrary code.

  - CVE-2007-1887     Stefan Esser discovered that a buffer overflow in the     sqlite extension allows the execution of arbitrary code.

  - CVE-2007-1889     Stefan Esser discovered that the PHP memory manager     performs an incorrect type cast, which allows the     execution of arbitrary code through buffer overflows.

  - CVE-2007-1900     Stefan Esser discovered that incorrect validation in the     email filter extension allows the injection of mail     headers.

The oldstable distribution (sarge) doesn't include php5.

This Update fixes numerous vulnerabilities in PHP. Most of them were made public during the 'Month of PHP Bugs'. The vulnerabilities potentially lead to crashes, information leaks or even execution of malicious code.

CVE-2007-1380 / CVE-2007-0988 / CVE-2007-1375 / CVE-2007-1521 / CVE-2007-1376 / CVE-2007-1583 / CVE-2007-1461 / CVE-2007-1484 / CVE-2007-1700 / CVE-2007-1717 / CVE-2007-1718 / CVE-2007-1001 / CVE-2007-1824

The remote host is affected by the vulnerability described in GLSA-200703-21 (PHP: Multiple vulnerabilities)

    Several vulnerabilities were found in PHP by the Hardened-PHP Project     and other researchers. These vulnerabilities include a heap-based     buffer overflow in htmlentities() and htmlspecialchars() if called with     UTF-8 parameters, and an off-by-one error in str_ireplace(). Other     vulnerabilities were also found in the PHP4 branch, including possible     overflows, stack corruptions and a format string vulnerability in the
    *print() functions on 64 bit systems.
  Impact :

    Remote attackers might be able to exploit these issues in PHP     applications making use of the affected functions, potentially     resulting in the execution of arbitrary code, Denial of Service,     execution of scripted contents in the context of the affected site,     security bypass or information leak.
  Workaround :

    There is no known workaround at this time.

Stefan Esser discovered multiple vulnerabilities in the 'Month of PHP bugs'.

The substr_compare() function did not sufficiently verify its length argument. This might be exploited to read otherwise unaccessible memory, which might lead to information disclosure. (CVE-2007-1375)

The shared memory (shmop) functions did not verify resource types, thus they could be called with a wrong resource type that might contain user-supplied data. This could be exploited to read and write arbitrary memory addresses of the PHP interpreter. This issue does not affect Ubuntu 7.04. (CVE-2007-1376)

The php_binary handler of the session extension was missing a boundary check. When unserializing overly long variable names this could be exploited to read up to 126 bytes of memory, which might lead to information disclosure. (CVE-2007-1380)

The internal array_user_key_compare() function, as used for example by the PHP function uksort(), incorrectly handled memory unreferencing of its arguments. This could have been exploited to execute arbitrary code with the privileges of the PHP interpreter, and thus circumventing any disable_functions, open_basedir, or safe_mode restrictions. (CVE-2007-1484)

The session_regenerate_id() function did not properly clean up the former session identifier variable. This could be exploited to crash the PHP interpreter, possibly also remotely. (CVE-2007-1521)

Under certain conditions the mb_parse_str() could cause the register_globals configuration option to become permanently enabled.
This opened an attack vector for a large and common class of vulnerabilities. (CVE-2007-1583)

The session extension did not set the correct reference count value for the session variables. By unsetting _SESSION and HTTP_SESSION_VARS (or tricking a PHP script into doing that) this could be exploited to execute arbitrary code with the privileges of the PHP interpreter.
This issue does not affect Ubuntu 7.04. (CVE-2007-1700)

The mail() function did not correctly escape control characters in multiline email headers. This could be remotely exploited to inject arbitrary email headers. (CVE-2007-1718)

The php_stream_filter_create() function had an off-by-one buffer overflow in the handling of wildcards. This could be exploited to remotely crash the PHP interpreter. This issue does not affect Ubuntu 7.04. (CVE-2007-1824)

When calling the sqlite_udf_decode_binary() with special arguments, a buffer overflow happened. Depending on the application this could be locally or remotely exploited to execute arbitrary code with the privileges of the PHP interpreter. (CVE-2007-1887 CVE-2007-1888)

The FILTER_VALIDATE_EMAIL filter extension used a wrong regular expression that allowed injecting a newline character at the end of the email string. This could be exploited to inject arbitrary email headers. This issue only affects Ubuntu 7.04. (CVE-2007-1900).

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 remote host is running a version of PHP lower than 4.4.7 or 5.2.2.  This version is vulnerable to a number of remote issues.  At least one of these issues is related to a buffer overflow attack.  An attacker exploiting these flaws would be able to impact confidentiality, integrity, and availability. 

ID	Name	Product	Family	Published	Updated	Severity
27150	openSUSE 10 Security Update : apache2-mod_php5 (apache2-mod_php5-3289)	Nessus	SuSE Local Security Checks	10/17/2007	1/14/2021	high
25159	PHP < 4.4.7 / 5.2.2 Multiple Vulnerabilities	Nessus	CGI abuses	5/4/2007	4/11/2022	high
26107	Mandrake Linux Security Advisory : php (MDKSA-2007:187)	Nessus	Mandriva Local Security Checks	9/24/2007	1/6/2021	critical
25100	Debian DSA-1283-1 : php5 - several vulnerabilities	Nessus	Debian Local Security Checks	4/30/2007	1/4/2021	high
29378	SuSE 10 Security Update : PHP5 (ZYPP Patch Number 3290)	Nessus	SuSE Local Security Checks	12/13/2007	1/14/2021	high
24887	GLSA-200703-21 : PHP: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	3/26/2007	1/6/2021	critical
28053	Ubuntu 6.06 LTS / 6.10 / 7.04 : php5 vulnerabilities (USN-455-1)	Nessus	Ubuntu Local Security Checks	11/10/2007	1/19/2021	high
3982	PHP 4.x < 4.4.7 / 5.x < 5.2.2 Multiple Vulnerabilities	Nessus Network Monitor	Web Servers	5/4/2007	3/6/2019	high
801085	PHP < 4.4.7 / 5.2.2 Multiple Vulnerabilities	Log Correlation Engine	Web Servers			high

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