PHP HTML entity encoder heap overflow vulnerability

Description
  • This alert was generated using only banner information. It may be a false positive.

    Stefan Esser reported some vulnerabilities in PHP, which can be exploited by malicious people to cause a DoS (Denial of Service) or potentially compromise a vulnerable system.The vulnerabilities are caused due to boundary errors within the "htmlentities()" and "htmlspecialchars()" functions. If a PHP application uses these functions to process user-supplied input, this can be exploited to cause a heap-based buffer overflow by passing specially crafted data to the affected application. Successful exploitation may allow execution of arbitrary code, but requires that the UTF-8 character set is selected. For a detailed explanation of the vulnerability read the referenced article.
    Vendor has released PHP 5.2.0 which fixes this issue.

    Affected PHP versions (up to 4.4.4/5.1.6).
Remediation
  • Upgrade PHP to the latest version.
References