CVE-2007-1990 in MyBlog
Summary
by MITRE
PHP remote file inclusion vulnerability in games.php in Sam Crew MyBlog, possibly 1.0 through 1.6, allows remote attackers to execute arbitrary PHP code via a URL in the id parameter, a different vector than CVE-2007-1968. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.
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Analysis
by VulDB Data Team • 08/28/2018
The vulnerability identified as CVE-2007-1990 represents a critical remote file inclusion flaw in the Sam Crew MyBlog software version 1.0 through 1.6, specifically affecting the games.php component. This vulnerability falls under the category of insecure direct object references and remote code execution threats that have been systematically catalogued under CWE-829. The issue manifests when the application fails to properly validate or sanitize user input parameters, particularly the id parameter that is processed through the games.php script. This particular vulnerability differs from CVE-2007-1968 in its attack vector, indicating a distinct pathway for exploitation that requires careful analysis of the software's input handling mechanisms.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious URL and passes it through the id parameter of the games.php script. When the vulnerable application processes this parameter without proper validation, it inadvertently includes and executes the remote PHP code from the attacker-controlled URL. This mechanism operates through the PHP include or require functions that accept dynamic file paths, allowing attackers to inject arbitrary PHP code that gets executed within the context of the web server. The vulnerability is particularly dangerous because it enables attackers to execute code with the privileges of the web server process, potentially leading to complete system compromise.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with a pathway to establish persistent access to the compromised system. According to ATT&CK framework categorization, this vulnerability maps to T1190 - Exploit Public-Facing Application and T1059 - Command and Scripting Interpreter, representing both the initial compromise vector and the execution techniques available to adversaries. Attackers can leverage this vulnerability to deploy web shells, exfiltrate sensitive data, or establish backdoors that persist across system reboots. The vulnerability affects not only the immediate web application but potentially the entire underlying server infrastructure, especially when the web server has access to sensitive system resources or databases.
Mitigation strategies for CVE-2007-1990 should focus on immediate input validation and sanitization measures that prevent the inclusion of external URLs in file parameters. The recommended approach involves implementing strict parameter validation using allowlists of acceptable values, disabling remote file inclusion features in PHP configurations, and employing proper input sanitization techniques that prevent malicious URLs from being processed. Organizations should also consider implementing web application firewalls to detect and block suspicious parameter patterns, as well as conducting regular security audits to identify similar vulnerabilities in other components of the application stack. Additionally, the vulnerability highlights the importance of keeping software components updated, as this issue was resolved in later versions of the MyBlog software that implemented proper input validation mechanisms.