PHP HTML tags may bypass strip_tag function in Microsoft Internet Explorer and Safari
| php-strip-tag-bypass (16692) |  Medium Risk |
Description:
PHP could allow a remote attacker to inject arbitrary script tags in Microsoft Internet Explorer and Safari Web browsers, caused by improper handling of HTML tags within the strip_tag function. If 'magic_quotes_gpc' is not enabled, the strip_tag function does not properly strip HTML supplied tags, allowing the tags to bypass security. An attacker could exploit this vulnerability to launch further attacks against a vulnerable system, such as cross-site scripting attacks.
Note: It is reported that Opera, Konqueror, Mozilla, Firefox, and Epiphany are not vulnerable.
Platforms Affected:
- Canonical, Ubuntu 4.10
- Canonical, Ubuntu 5.04
- Conectiva, Linux 10
- Conectiva, Linux 8.0
- Conectiva, Linux 9.0
- Debian, Debian Linux 3.0
- Gentoo, Linux
- HP, HP-UX 11.00
- HP, HP-UX 11.11
- HP, HP-UX 11.22
- HP, HP-UX 11.23
- MandrakeSoft, Mandrake Linux 10.0
- MandrakeSoft, Mandrake Linux 10.0 AMD64
- MandrakeSoft, Mandrake Linux 9.1 PPC
- MandrakeSoft, Mandrake Linux 9.1
- MandrakeSoft, Mandrake Linux 9.2 AMD64
- MandrakeSoft, Mandrake Linux 9.2
- MandrakeSoft, Mandrake Linux Corporate Server 2.1
- MandrakeSoft, Mandrake Linux Corporate Server 2.1 X86_64
- MandrakeSoft, Mandrake Multi Network Firewall 8.2
- Novell, UnitedLinux 1.0
- OpenPKG, OpenPKG 2.0
- OpenPKG, OpenPKG 2.1
- OpenPKG, OpenPKG CURRENT
- PHP, PHP 4.0 Beta3
- PHP, PHP 4.0 RC1
- PHP, PHP 4.0 RC2
- PHP, PHP 4.0 Beta2
- PHP, PHP 4.0 Beta1
- PHP, PHP 4.0 Beta 4 Patch1
- PHP, PHP 4.0 Beta4
- PHP, PHP 4.0.0
- PHP, PHP 4.0.1
- PHP, PHP 4.0.2
- PHP, PHP 4.0.3
- PHP, PHP 4.0.4
- PHP, PHP 4.0.5
- PHP, PHP 4.0.6
- PHP, PHP 4.0.7
- PHP, PHP 4.1.0
- PHP, PHP 4.1.1
- PHP, PHP 4.1.2
- PHP, PHP 4.1.3
- PHP, PHP 4.2.0
- PHP, PHP 4.2.1
- PHP, PHP 4.2.2
- PHP, PHP 4.2.3
- PHP, PHP 4.2.4
- PHP, PHP 4.3.0
- PHP, PHP 4.3.1
- PHP, PHP 4.3.2
- PHP, PHP 4.3.3
- PHP, PHP 4.3.4
- PHP, PHP 4.3.5
- PHP, PHP 4.3.6
- PHP, PHP 4.3.7
- PHP, PHP 5.0.0 Beta4
- PHP, PHP 5.0.0 Beta3
- PHP, PHP 5.0.0 Beta2
- PHP, PHP 5.0.0 Beta1
- PHP, PHP 5.0.0 RC2
- PHP, PHP 5.0.0 RC1
- RedHat, Enterprise Linux 2.1 AW
- RedHat, Enterprise Linux 2.1 WS
- RedHat, Enterprise Linux 2.1 AS
- RedHat, Enterprise Linux 2.1 ES
- RedHat, Enterprise Linux 3 WS
- RedHat, Enterprise Linux 3 ES
- RedHat, Enterprise Linux 3 AS
- RedHat, Enterprise Linux 3 Desktop
- RedHat, Linux Advanced Workstation 2.1 Itanium
- RedHat, Stronghold
- Slackware, Slackware Linux 8.1
- Slackware, Slackware Linux 9.0
- Slackware, Slackware Linux 9.1
- Slackware, Slackware Linux current
- SuSE, Linux Enterprise Server 8
- SuSE, SuSE Linux 8.0
- SuSE, SuSE Linux 8.1
- SuSE, SuSE Linux 8.2
- SuSE, SuSE Linux 9.0
- SuSE, SuSE Linux 9.1
- SuSE, SuSE Linux Office Server
- Turbolinux, Turbolinux 7 Server
- Turbolinux, Turbolinux 7 Workstation
- Turbolinux, Turbolinux 8 Server
- Turbolinux, Turbolinux 8 Workstation
- Turbolinux, Turbolinux Appliance Server 1.0
- Turbolinux, Turbolinux Appliance Server 1.0 Hosting Ed
- Turbolinux, Turbolinux Appliance Server 1.0 Workgroup Ed
Remedy:
For PHP4:
Upgrade to the latest version of PHP4 (4.3.8 or later), available from the PHP Web site. See References.
For PHP5:
Upgrade to the latest version of PHP5 (5.0.0 dated 13-Jul-2004 or later), available from the PHP Web site. See References.
For Mandrake Linux:
Upgrade to the latest php package, as listed below. Refer to MandrakeSoft Security Advisory MDKSA-2004:068 : php for more information. See References.
Mandrake Linux 9.1: 430-11.2.91mdk or later
Mandrake Linux 9.2: 4.3.3-2.1.92mdk or later
Mandrake Linux Multi Network Firewall 8.2: 4.1.2-1.3.M82mdk or later
Mandrake Linux Corporate Server 2.1: 4.2.3-4.2.C21mdk or later
Mandrake Linux 10.0: 4.3.4-4.1.100mdk or later
For Gentoo Linux:
Upgrade to the latest version of php (4.3.8 or later), as listed in GLSA 200407-13. See References.
For SuSE Linux:
Upgrade to the latest php package, as listed below. Refer to SuSE Security Announcement SUSE-SA:2004:021 for more information. See References.
SuSE Linux 9.1: 4.3.4-43.11 or later
SuSE Linux 9.0: 4.3.3-177 or later
SuSE Linux 8.2: 4.3.1-169 or later
SuSE Linux 8.1: 4.2.2-479 or later
SuSE Linux 8.0: 4.1.0-317 or later
For Red Hat Linux:
Upgrade to the latest php package, as listed below. Refer to RHSA-2004:395-10 for more information. See References.
Red Hat Enterprise Linux AS (v. 2.1), ES (v. 2.1), WS (v. 2.1), and Red Hat Linux Advanced Workstation 2.1 for the Itanium Processor: 4.1.2-2.1.8 or later
For Red Hat Linux Stronghold:
Refer to RHSA-2005:816-10 for patch, upgrade, or suggested workaround information. See References.
For Conectiva Linux:
Upgrade to the latest php package, as listed below. Refer to Conectiva Linux Security Announcement CLSA-2004:847 for more information. See References.
Conectiva Linux 10: 4.3.6-63187U10_1cl or later
Conectiva Linux 8: 4.3.3-1U80_2cl or later
Conectiva Linux 9: 4.3.3-26997U90_3cl or later
For Slackware Linux:
Upgrade to the latest php package, as listed below. Refer to slackware-security Mailing List, Tue, 20 Jul 2004 23:21:16 -0700 (PDT) for more information. See References.
Slackware Linux 8.1and 9.0 : 4.3.8-i386-1 or later
Slackware Linux 9.1, 10.0 and -current: 4.3.8-i486-1 or later
For Debian GNU/Linux 3.0 (alias woody):
Upgrade to the latest php package (4.1.2-7 or later), as listed in DSA-531-1. See References.
For Debian GNU/Linux 3.0 (woody):
Upgrade to the latest version of php3 (3.0.18-23.1woody2 or later), as listed in DSA-669-1. See References.
For OpenPKG:
Upgrade to the latest php package, as listed in OpenPKG Security Advisory OpenPKG-SA-2004.034-php. See References.
OpenPKG CURRENT: 4.3.8-20040714 or later
OpenPKG 2.0 : 4.3.4-2.0.1 or later
For HP-UX 11.00, 11.11, 11.22, and 11.23:
Apply the appropriate patch for your system, as listed in Hewlett-Packard Company Security Bulletin HPSBUX01064. See References.
For Turbolinux:
Upgrade to the latest php package, as listed below. Refer to Turbolinux Security Advisory TLSA-2004-23 for more information. See References.
Turbolinux Appliance Server 1.0 Hosting Edition and Turbolinux Appliance Server 1.0 Workgroup Edition: 4.2.3-19 or later
Turbolinux Turbolinux 8 Server and Workstation: 4.2.3-18 or later
Turbolinux Turbolinux 7 Server and Workstation: 4.2.3-18 or later
For Ubuntu Linux:
Refer to USN-155-2 and USN-155-3 for patch, upgrade, or workaround information. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
Consequences:
Bypass Security
References:
- CIAC Information Bulletin 0-184, PHP memory_limit and strip_tags Vulnerabilities [REVISED 5 Aug 2004] at http://www.ciac.org/ciac/bulletins/o-184.shtml.
- CIAC Information Bulletin 0-184, PHP memory_limit and strip_tags Vulnerabilities at http://www.ciac.org/ciac/bulletins/o-184.shtml.
- CIAC Information Bulletin P-116, Apple Security Update 2005-001 for Mac OS X at http://www.ciac.org/ciac/bulletins/p-116.shtml.
- Conectiva Linux Security Announcement CLSA-2004:847, Remote arbitrary code execution vulnerabilities and other at http://distro.conectiva.com.br/atualizacoes/index.php?id=a&anuncio=000847.
- ematter Security Advisory 2004/07/14, PHP strip_tags() bypass vulnerability at http://www.hardened-php.net/advisory_em122004.101.html.
- Full-Disclosure Mailing List, Tue Jul 13 2004 - 17:55:25 CDT , PHP strip_tags() bypass vulnerability at http://archives.neohapsis.com/archives/fulldisclosure/2004-07/0577.html.
- PHP Web site, PHP:Hypertext Preprocessor at http://www.php.net.
- Slackware Security Advisories Tue, 20 Jul 2004 23:21:16 -0700 (PDT), [slackware-security] PHP (SSA:2004-202-01) at http://slackware.com/security/viewer.php?l=slackware-security&y=2004&m=slackware-security.406480.
- BID-10724: PHP Strip_Tags() Function Bypass Vulnerability
- CVE-2004-0595: The strip_tags function in PHP 4.x up to 4.3.7, and 5.x up to 5.0.0RC3, does not filter null (\0) characters within tag names when restricting input to allowed tags, which allows dangerous tags to be processed by web browsers such as Internet Explorer and Safari, which ignore null characters and facilitate the exploitation of cross-site scripting (XSS) vulnerabilities.
- DSA-531: php4 -- several vulnerabilities
- DSA-669: php3 -- several vulnerabilities
- GLSA-200407-13: PHP: Multiple security vulnerabilities
- MDKSA-2004:068: Updated php packages fix multiple vulnerabilities
- OpenPKG-SA-2004.034: PHP
- RHSA-2004-392: php security update
- RHSA-2004-395: php security update
- RHSA-2005-816: apache
- SUSE-SA:2004:021: php4 / mod_php4: remote code execution
Reported:
Jul 14, 2004
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.
For corrections or additions please email xforce@iss.net