CVE-2008-6499 in xampp
Summary
by MITRE
security/xamppsecurity.php in XAMPP 1.6.8 performs an extract operation on the SERVER superglobal array, which allows remote attackers to spoof critical variables, as demonstrated by setting the REMOTE_ADDR variable to 127.0.0.1.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 11/16/2024
The vulnerability identified as CVE-2008-6499 resides within the security/xamppsecurity.php component of XAMPP version 1.6.8, representing a critical flaw in the application's input sanitization and variable handling mechanisms. This issue stems from the insecure use of the extract function on the SERVER superglobal array, a practice that fundamentally compromises the integrity of server-side variable management. The vulnerability allows remote attackers to manipulate critical server variables through crafted HTTP requests, effectively bypassing security controls that rely on these variables for access validation and authentication purposes.
The technical implementation of this vulnerability exploits the PHP extract function's behavior of creating variables from array keys and values, without proper validation or sanitization. When the XAMPP security script processes the SERVER superglobal array through extract(), it inadvertently creates variables in the local scope that can be overridden by attackers. The specific demonstration of this flaw involves the manipulation of the REMOTE_ADDR variable, which is crucial for determining client IP addresses and enforcing access controls. By setting REMOTE_ADDR to 127.0.0.1, attackers can spoof their location as localhost, potentially gaining unauthorized access to administrative functions and bypassing network-based security restrictions that typically protect sensitive areas of web applications.
The operational impact of CVE-2008-6499 extends beyond simple variable spoofing, as it fundamentally undermines the security model of XAMPP installations. This vulnerability enables attackers to circumvent authentication mechanisms that depend on server variables for determining access privileges, potentially allowing unauthorized users to gain administrative access to the XAMPP control panel and underlying web applications. The implications are particularly severe in development environments where XAMPP is commonly deployed, as these systems often contain sensitive data and may be accessible from untrusted networks. The vulnerability also aligns with CWE-20, which describes improper input validation, and represents a classic example of insecure data handling that enables privilege escalation and unauthorized access.
The attack vector for this vulnerability is straightforward, requiring only an attacker with network access to the XAMPP server to craft HTTP requests that include malicious SERVER array data. This weakness directly corresponds to techniques outlined in the attack pattern taxonomy under the MITRE ATT&CK framework, particularly those related to privilege escalation and defense evasion. The vulnerability demonstrates the dangerous consequences of improper variable handling and inadequate input validation, which are common in legacy applications and development environments that have not been properly secured. Organizations using XAMPP 1.6.8 or similar vulnerable versions face significant risks, as this flaw can be exploited to gain complete control over the web server environment, potentially leading to data breaches, system compromise, and further lateral movement within network infrastructures. The recommended mitigation involves upgrading to patched versions of XAMPP, implementing proper variable sanitization techniques, and avoiding the use of extract() with untrusted data sources to prevent similar vulnerabilities from manifesting in other applications.