PHP HTML entity encoder heap overflow vulnerability

Description
  • <div class="bb-coolbox"><span class="bb-dark">This alert was generated using only banner information. It may be a false positive. </span></div><br/>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.<br/>Vendor has released PHP 5.2.0 which fixes this issue.<br/><br/><span class="bb-navy">Affected PHP versions (up to 4.4.4/5.1.6).</span><br/>
Remediation
  • Upgrade PHP to the latest version.
References