CVE-2012-4388: Input Validation
First published: Fri Sep 07 2012(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| PHP | >=5.3.0<5.3.11 | |
| PHP | =5.4.0-rc2 | |
| Ubuntu Linux | =8.04 | |
| Ubuntu Linux | =10.04 | |
| Ubuntu Linux | =11.04 | |
| Ubuntu Linux | =11.10 | |
| Ubuntu Linux | =12.04 | |
| Debian GNU/Linux | =6.0 |
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Reference Links
- 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
Frequently Asked Questions
What is the severity of CVE-2012-4388?
CVE-2012-4388 has a medium severity level as it allows remote attackers to bypass HTTP response-splitting protections.
How do I fix CVE-2012-4388?
To fix CVE-2012-4388, upgrade PHP to a version later than 5.4.0 that addresses this vulnerability.
What versions of PHP are affected by CVE-2012-4388?
CVE-2012-4388 affects PHP versions from 5.4.0RC2 through 5.4.0, as well as 5.3.0 to 5.3.11.
Can CVE-2012-4388 be exploited remotely?
Yes, CVE-2012-4388 can be exploited remotely through crafted URLs that bypass the protection mechanism.
Which operating systems are impacted by CVE-2012-4388?
CVE-2012-4388 impacts various operating systems, including Ubuntu Linux 8.04 to 12.04 and Debian Linux 6.0.
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- agent/description
- agent/event
- agent/softwarecombine
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/php
- canonical/php
- version/php/5.3.0
- version/php/5.4.0-rc2
- vendor/canonical
- canonical/ubuntu linux
- version/ubuntu linux/8.04
- version/ubuntu linux/10.04
- version/ubuntu linux/11.04
- version/ubuntu linux/11.10
- version/ubuntu linux/12.04
- vendor/debian
- canonical/debian gnu/linux
- version/debian gnu/linux/6.0