The sapi_header_op function in main/SAPI.c in PHP before 5.3.11 and 5.4.x before 5.4.0RC2 does not check for %0D sequences (aka carriage return characters), which allows remote attackers to bypass an HTTP response-splitting protection mechanism via a crafted URL, related to improper interaction between the PHP header function and certain browsers, as demonstrated by Internet Explorer and Google Chrome.

This update fixes header code injection issues in PHP5 (CVE-2011-1398 and CVE-2011-4388).

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.

Updated php53 packages that fix multiple security issues, several bugs, and add one enhancement are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

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

It was found that PHP did not properly handle file names with a NULL character. A remote attacker could possibly use this flaw to make a PHP script access unexpected files and bypass intended file system access restrictions. (CVE-2006-7243)

It was found that PHP did not check for carriage returns in HTTP headers, allowing intended HTTP response splitting protections to be bypassed. Depending on the web browser the victim is using, a remote attacker could use this flaw to perform HTTP response splitting attacks. (CVE-2011-1398)

A flaw was found in PHP's SSL client's hostname identity check when handling certificates that contain hostnames with NULL bytes. If an attacker was able to get a carefully crafted certificate signed by a trusted Certificate Authority, the attacker could use the certificate to conduct man-in-the-middle attacks to spoof SSL servers.
(CVE-2013-4248)

An integer signedness issue, leading to a heap-based buffer underflow, was found in the PHP scandir() function. If a remote attacker could upload an excessively large number of files to a directory the scandir() function runs on, it could cause the PHP interpreter to crash or, possibly, execute arbitrary code. (CVE-2012-2688)

It was found that PHP did not correctly handle the magic_quotes_gpc configuration directive. This could result in magic_quotes_gpc input escaping not being applied in all cases, possibly making it easier for a remote attacker to perform SQL injection attacks. (CVE-2012-0831)

It was found that the PHP SOAP parser allowed the expansion of external XML entities during SOAP message parsing. A remote attacker could possibly use this flaw to read arbitrary files that are accessible to a PHP application using a SOAP extension.
(CVE-2013-1643)

These updated php53 packages also include numerous bug fixes and enhancements. Space precludes documenting all of these changes in this advisory. Users are directed to the Red Hat Enterprise Linux 5.10 Technical Notes, linked to in the References, for information on the most significant of these changes.

All PHP users are advised to upgrade to these updated packages, which contain backported patches to correct these issues and add this enhancement. After installing the updated packages, the httpd daemon must be restarted for the update to take effect.

php5 was updated to fix two security issues :

  - use FilesMatch with 'SetHandler' rather than     'AddHandler' [bnc#775852] Since this update just hardens     a configuration to protect weakly designed web     applications, there was no CVE assigned.

  - A HTTP header Carriage-Return injection flaw was fixed     (CVE-2011-1398 and CVE-2011-4388 [bnc#778003])

A memory corruption flaw was found in the way the openssl_x509_parse() function of the PHP openssl extension parsed X.509 certificates. A remote attacker could use this flaw to provide a malicious self-signed certificate or a certificate signed by a trusted authority to a PHP application using the aforementioned function, causing the application to crash or, possibly, allow the attacker to execute arbitrary code with the privileges of the user running the PHP interpreter.
(CVE-2013-6420)

It was found that PHP did not check for carriage returns in HTTP headers, allowing intended HTTP response splitting protections to be bypassed. Depending on the web browser the victim is using, a remote attacker could use this flaw to perform HTTP response splitting attacks. (CVE-2011-1398)

An integer signedness issue, leading to a heap-based buffer underflow, was found in the PHP scandir() function. If a remote attacker could upload an excessively large number of files to a directory the scandir() function runs on, it could cause the PHP interpreter to crash or, possibly, execute arbitrary code. (CVE-2012-2688)

It was found that the PHP SOAP parser allowed the expansion of external XML entities during SOAP message parsing. A remote attacker could possibly use this flaw to read arbitrary files that are accessible to a PHP application using a SOAP extension.
(CVE-2013-1643)

After installing the updated packages, the httpd daemon must be restarted for the update to take effect.

The remote Oracle Linux 5 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2013-1814 advisory.

    [5.1.6-43]
    - drop unneeded patch

    [5.1.6-42]
    - add security fixes for CVE-2012-2688,       CVE-2011-1398, CVE-2013-1643, CVE-2013-6420

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 multiple security issues are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having critical security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

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

A memory corruption flaw was found in the way the openssl_x509_parse() function of the PHP openssl extension parsed X.509 certificates. A remote attacker could use this flaw to provide a malicious self-signed certificate or a certificate signed by a trusted authority to a PHP application using the aforementioned function, causing the application to crash or, possibly, allow the attacker to execute arbitrary code with the privileges of the user running the PHP interpreter.
(CVE-2013-6420)

It was found that PHP did not check for carriage returns in HTTP headers, allowing intended HTTP response splitting protections to be bypassed. Depending on the web browser the victim is using, a remote attacker could use this flaw to perform HTTP response splitting attacks. (CVE-2011-1398)

An integer signedness issue, leading to a heap-based buffer underflow, was found in the PHP scandir() function. If a remote attacker could upload an excessively large number of files to a directory the scandir() function runs on, it could cause the PHP interpreter to crash or, possibly, execute arbitrary code. (CVE-2012-2688)

It was found that the PHP SOAP parser allowed the expansion of external XML entities during SOAP message parsing. A remote attacker could possibly use this flaw to read arbitrary files that are accessible to a PHP application using a SOAP extension.
(CVE-2013-1643)

Red Hat would like to thank the PHP project for reporting CVE-2013-6420. Upstream acknowledges Stefan Esser as the original reporter.

All php users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. After installing the updated packages, the httpd daemon must be restarted for the update to take effect.

It was found that PHP did not properly handle file names with a NULL character. A remote attacker could possibly use this flaw to make a PHP script access unexpected files and bypass intended file system access restrictions. (CVE-2006-7243)

It was found that PHP did not check for carriage returns in HTTP headers, allowing intended HTTP response splitting protections to be bypassed. Depending on the web browser the victim is using, a remote attacker could use this flaw to perform HTTP response splitting attacks. (CVE-2011-1398)

A flaw was found in PHP's SSL client's hostname identity check when handling certificates that contain hostnames with NULL bytes. If an attacker was able to get a carefully crafted certificate signed by a trusted Certificate Authority, the attacker could use the certificate to conduct man-in-the-middle attacks to spoof SSL servers.
(CVE-2013-4248)

An integer signedness issue, leading to a heap-based buffer underflow, was found in the PHP scandir() function. If a remote attacker could upload an excessively large number of files to a directory the scandir() function runs on, it could cause the PHP interpreter to crash or, possibly, execute arbitrary code. (CVE-2012-2688)

It was found that PHP did not correctly handle the magic_quotes_gpc configuration directive. This could result in magic_quotes_gpc input escaping not being applied in all cases, possibly making it easier for a remote attacker to perform SQL injection attacks. (CVE-2012-0831)

It was found that the PHP SOAP parser allowed the expansion of external XML entities during SOAP message parsing. A remote attacker could possibly use this flaw to read arbitrary files that are accessible to a PHP application using a SOAP extension.
(CVE-2013-1643)

After installing the updated packages, the httpd daemon must be restarted for the update to take effect.

From Red Hat Security Advisory 2013:1307 :

Updated php53 packages that fix multiple security issues, several bugs, and add one enhancement are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

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

It was found that PHP did not properly handle file names with a NULL character. A remote attacker could possibly use this flaw to make a PHP script access unexpected files and bypass intended file system access restrictions. (CVE-2006-7243)

It was found that PHP did not check for carriage returns in HTTP headers, allowing intended HTTP response splitting protections to be bypassed. Depending on the web browser the victim is using, a remote attacker could use this flaw to perform HTTP response splitting attacks. (CVE-2011-1398)

A flaw was found in PHP's SSL client's hostname identity check when handling certificates that contain hostnames with NULL bytes. If an attacker was able to get a carefully crafted certificate signed by a trusted Certificate Authority, the attacker could use the certificate to conduct man-in-the-middle attacks to spoof SSL servers.
(CVE-2013-4248)

An integer signedness issue, leading to a heap-based buffer underflow, was found in the PHP scandir() function. If a remote attacker could upload an excessively large number of files to a directory the scandir() function runs on, it could cause the PHP interpreter to crash or, possibly, execute arbitrary code. (CVE-2012-2688)

It was found that PHP did not correctly handle the magic_quotes_gpc configuration directive. This could result in magic_quotes_gpc input escaping not being applied in all cases, possibly making it easier for a remote attacker to perform SQL injection attacks. (CVE-2012-0831)

It was found that the PHP SOAP parser allowed the expansion of external XML entities during SOAP message parsing. A remote attacker could possibly use this flaw to read arbitrary files that are accessible to a PHP application using a SOAP extension.
(CVE-2013-1643)

These updated php53 packages also include numerous bug fixes and enhancements. Space precludes documenting all of these changes in this advisory. Users are directed to the Red Hat Enterprise Linux 5.10 Technical Notes, linked to in the References, for information on the most significant of these changes.

All PHP users are advised to upgrade to these updated packages, which contain backported patches to correct these issues and add this enhancement. After installing the updated packages, the httpd daemon must be restarted for the update to take effect.

The remote Redhat Enterprise Linux 5 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2013:1307 advisory.

  - php: paths with NULL character were considered valid (CVE-2006-7243)

  - PHP: sapi_header_op() %0D sequence handling security bypass (CVE-2011-1398)

  - php: PG(magic_quote_gpc) was not restored on shutdown (CVE-2012-0831)

  - php: Integer Signedness issues in _php_stream_scandir (CVE-2012-2688)

  - php: Ability to read arbitrary files due use of external entities while parsing SOAP WSDL files     (CVE-2013-1643)

  - php: hostname check bypassing vulnerability in SSL client (CVE-2013-4248)

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

PHP versions earlier than 5.3.11 are affected by the following vulnerabilities : 

 - During the import of environment variables, temporary changes to the 'magic_quotes_gpc' directive are not handled properly. This can lower the difficulty for SQL injection attacks. (CVE-2012-0831)

  - The '$_FILES' variable can be corrupted because the names of uploaded files are not properly validated. (CVE-2012-1172)

  - The 'open_basedir' directive is not properly handled by the functions 'readline_write_history' and 'readline_read_history'.

  - The 'header()' function does not detect multi-line headers with a CR. (Bug #60227 / CVE-2011-1398)

From Red Hat Security Advisory 2013:0514 :

Updated php packages that fix three security issues, several bugs, and add various enhancements are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

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

It was found that PHP did not check for carriage returns in HTTP headers, allowing intended HTTP response splitting protections to be bypassed. Depending on the web browser the victim is using, a remote attacker could use this flaw to perform HTTP response splitting attacks. (CVE-2011-1398)

An integer signedness issue, leading to a heap-based buffer underflow, was found in the PHP scandir() function. If a remote attacker could upload an excessively large number of files to a directory the scandir() function runs on, it could cause the PHP interpreter to crash or, possibly, execute arbitrary code. (CVE-2012-2688)

It was found that PHP did not correctly handle the magic_quotes_gpc configuration directive. This could result in magic_quotes_gpc input escaping not being applied in all cases, possibly making it easier for a remote attacker to perform SQL injection attacks. (CVE-2012-0831)

These updated php packages also include numerous bug fixes and enhancements. Space precludes documenting all of these changes in this advisory. Users are directed to the Red Hat Enterprise Linux 6.4 Technical Notes, linked to in the References, for information on the most significant of these changes.

All users of php are advised to upgrade to these updated packages, which fix these issues and add these enhancements. After installing the updated packages, the httpd daemon must be restarted for the update to take effect.

Updated php packages that fix three security issues, several bugs, and add various enhancements are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

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

It was found that PHP did not check for carriage returns in HTTP headers, allowing intended HTTP response splitting protections to be bypassed. Depending on the web browser the victim is using, a remote attacker could use this flaw to perform HTTP response splitting attacks. (CVE-2011-1398)

An integer signedness issue, leading to a heap-based buffer underflow, was found in the PHP scandir() function. If a remote attacker could upload an excessively large number of files to a directory the scandir() function runs on, it could cause the PHP interpreter to crash or, possibly, execute arbitrary code. (CVE-2012-2688)

It was found that PHP did not correctly handle the magic_quotes_gpc configuration directive. This could result in magic_quotes_gpc input escaping not being applied in all cases, possibly making it easier for a remote attacker to perform SQL injection attacks. (CVE-2012-0831)

These updated php packages also include numerous bug fixes and enhancements. Space precludes documenting all of these changes in this advisory. Users are directed to the Red Hat Enterprise Linux 6.4 Technical Notes, linked to in the References, for information on the most significant of these changes.

All users of php are advised to upgrade to these updated packages, which fix these issues and add these enhancements. After installing the updated packages, the httpd daemon must be restarted for the update to take effect.

It was found that PHP did not check for carriage returns in HTTP headers, allowing intended HTTP response splitting protections to be bypassed. Depending on the web browser the victim is using, a remote attacker could use this flaw to perform HTTP response splitting attacks. (CVE-2011-1398)

An integer signedness issue, leading to a heap-based buffer underflow, was found in the PHP scandir() function. If a remote attacker could upload an excessively large number of files to a directory the scandir() function runs on, it could cause the PHP interpreter to crash or, possibly, execute arbitrary code. (CVE-2012-2688)

It was found that PHP did not correctly handle the magic_quotes_gpc configuration directive. This could result in magic_quotes_gpc input escaping not being applied in all cases, possibly making it easier for a remote attacker to perform SQL injection attacks. (CVE-2012-0831)

After installing the updated packages, the httpd daemon must be restarted for the update to take effect.

This update fixes CVE-2011-1398 / CVE-2011-4388 (header injection via CR).

This update also changes the default configuration to use FilesMatch with 'SetHandler' rather than 'AddHandler' to protect weakly written web applications from content confusion. Since this is a hardening measure, no CVE was assigned.

The remote host is affected by the vulnerability described in GLSA-201209-03 (PHP: Multiple vulnerabilities)

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

    A remote attacker could execute arbitrary code with the privileges of       the process, cause a Denial of Service condition, obtain sensitive       information, create arbitrary files, conduct directory traversal attacks,       bypass protection mechanisms, or perform further attacks with unspecified       impact.
  Workaround :

    There is no known workaround at this time.

This update fixes header code injection issues in PHP5. (CVE-2011-1398 / CVE-2011-4388)

It was discovered that PHP incorrectly handled certain character sequences when applying HTTP response-splitting protection. A remote attacker could create a specially crafted URL and inject arbitrary headers. (CVE-2011-1398, CVE-2012-4388)

It was discovered that PHP incorrectly handled directories with a large number of files. This could allow a remote attacker to execute arbitrary code with the privileges of the web server, or to perform a denial of service. (CVE-2012-2688)

It was discovered that PHP incorrectly parsed certain PDO prepared statements. A remote attacker could use this flaw to cause PHP to crash, leading to a denial of service. (CVE-2012-3450).

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.

Rui Hirokawa reports :

As of PHP 5.1.2, header() can no longer be used to send multiple response headers in a single call to prevent the HTTP Response Splitting Attack. header() only checks the linefeed (LF, 0x0A) as line-end marker, it doesn't check the carriage-return (CR, 0x0D).

However, some browsers including Google Chrome, IE also recognize CR as the line-end.

The current specification of header() still has the vulnerability against the HTTP header splitting attack.

According to its banner, the version of PHP installed on the remote host is earlier than 5.3.11, and as such is potentially affected by multiple vulnerabilities :

 - During the import of environment variables, temporary    changes to the 'magic_quotes_gpc' directive are not    handled properly. This can lower the difficulty for    SQL injection attacks. (CVE-2012-0831)

 - The '$_FILES' variable can be corrupted because the    names of uploaded files are not properly validated.
   (CVE-2012-1172)

 - The 'open_basedir' directive is not properly handled by    the functions 'readline_write_history' and    'readline_read_history'.

  - The 'header()' function does not detect multi-line     headers with a CR. (Bug #60227 / CVE-2011-1398)

ID	Name	Product	Family	Severity
83560	SUSE SLES10 Security Update : PHP5 (SUSE-SU-2012:1210-1)	Nessus	SuSE Local Security Checks	high
79149	CentOS 5 : php53 (CESA-2013:1307)	Nessus	CentOS Local Security Checks	critical
74755	openSUSE Security Update : php5 (openSUSE-SU-2012:1169-1)	Nessus	SuSE Local Security Checks	medium
71373	Scientific Linux Security Update : php on SL5.x i386/x86_64 (20131211)	Nessus	Scientific Linux Local Security Checks	critical
71367	Oracle Linux 5 : php (ELSA-2013-1814)	Nessus	Oracle Linux Local Security Checks	high
71356	CentOS 5 : php (CESA-2013:1814)	Nessus	CentOS Local Security Checks	critical
71337	RHEL 5 : php (RHSA-2013:1814)	Nessus	Red Hat Local Security Checks	critical
70389	Scientific Linux Security Update : php53 on SL5.x i386/x86_64 (20130930)	Nessus	Scientific Linux Local Security Checks	critical
70284	Oracle Linux 5 : php53 (ELSA-2013-1307)	Nessus	Oracle Linux Local Security Checks	critical
70244	RHEL 5 : php53 (RHSA-2013:1307)	Nessus	Red Hat Local Security Checks	critical
6995	PHP < 5.3.11 Multiple Vulnerabilities	Nessus Network Monitor	Web Servers	high
68751	Oracle Linux 6 : php (ELSA-2013-0514)	Nessus	Oracle Linux Local Security Checks	critical
65146	CentOS 6 : php (CESA-2013:0514)	Nessus	CentOS Local Security Checks	critical
64957	Scientific Linux Security Update : php on SL6.x i386/x86_64 (20130221)	Nessus	Scientific Linux Local Security Checks	critical
64762	RHEL 6 : php (RHSA-2013:0514)	Nessus	Red Hat Local Security Checks	critical
64107	SuSE 11.2 Security Update : PHP5 (SAT Patch Number 6778)	Nessus	SuSE Local Security Checks	medium
64102	SuSE 11.2 Security Update : PHP5 (SAT Patch Number 6777)	Nessus	SuSE Local Security Checks	medium
62236	GLSA-201209-03 : PHP: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	critical
62198	SuSE 10 Security Update : PHP5 (ZYPP Patch Number 8293)	Nessus	SuSE Local Security Checks	medium
62178	Ubuntu 8.04 LTS / 10.04 LTS / 11.04 / 11.10 / 12.04 LTS : php5 vulnerabilities (USN-1569-1)	Nessus	Ubuntu Local Security Checks	critical
61782	FreeBSD : php5 -- header splitting attack via carriage-return character (918f38cd-f71e-11e1-8bd8-0022156e8794)	Nessus	FreeBSD Local Security Checks	medium
58966	PHP < 5.3.11 Multiple Vulnerabilities	Nessus	CGI abuses	medium

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CVE-2011-1398

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