ext/filter in PHP 5.2.0, when FILTER_SANITIZE_STRING is used with the FILTER_FLAG_STRIP_LOW flag, does not properly strip HTML tags, which allows remote attackers to conduct cross-site scripting (XSS) attacks via HTML with a < character followed by certain whitespace characters, which passes one filter but is collapsed into a valid tag, as demonstrated using %0b.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Php | Php | 5.2.0 (including) | 5.2.0 (including) |
| Php5 | Ubuntu | dapper | * |
| Php5 | Ubuntu | devel | * |
| Php5 | Ubuntu | edgy | * |
| Php5 | Ubuntu | feisty | * |
References
- http://secunia.com/advisories/25056
- http://secunia.com/advisories/25062
- http://www.debian.org/security/2007/dsa-1283
- http://www.mandriva.com/security/advisories?name=MDKSA-2007:090
- http://www.novell.com/linux/security/advisories/2007_32_php.html
- http://www.php-security.org/MOPB/MOPB-18-2007.html
- http://www.securityfocus.com/bid/22914
- http://secunia.com/advisories/25056
- http://secunia.com/advisories/25062
- http://www.debian.org/security/2007/dsa-1283
- http://www.mandriva.com/security/advisories?name=MDKSA-2007:090
- http://www.novell.com/linux/security/advisories/2007_32_php.html
- http://www.php-security.org/MOPB/MOPB-18-2007.html
- http://www.securityfocus.com/bid/22914