SB2012090801 - Input validation error in PHP

Description

This security bulletin contains information about 1 vulnerability.

1) Input validation error (CVE-ID: CVE-2012-4388)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote non-authenticated attacker to manipulate data.

The sapi_header_op function in main/SAPI.c in PHP 5.4.0RC2 through 5.4.0 does not properly determine a pointer during checks 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. NOTE: this vulnerability exists because of an incorrect fix for CVE-2011-1398.

Remediation

Install update from vendor's website.

References

• http://article.gmane.org/gmane.comp.php.devel/70584
• http://lists.opensuse.org/opensuse-security-announce/2013-08/msg00006.html
• http://openwall.com/lists/oss-security/2012/08/29/5
• http://openwall.com/lists/oss-security/2012/09/02/1
• http://openwall.com/lists/oss-security/2012/09/05/15
• http://openwall.com/lists/oss-security/2012/09/07/3
• http://security-tracker.debian.org/tracker/CVE-2012-4388
• http://svn.php.net/viewvc/php/php-src/branches/PHP_5_4/main/SAPI.c?r1=323986&r2=323985&pathrev=323986
• http://www.securitytracker.com/id?1027463
• http://www.ubuntu.com/usn/USN-1569-1
• https://bugs.php.net/bug.php?id=60227