CVE-2014-8731 in phpMemcachedAdmin
Summary
by MITRE
PHPMemcachedAdmin 1.2.2 and earlier allows remote attackers to execute arbitrary PHP code via vectors related "serialized data and the last part of the concatenated filename," which creates a file in webroot.
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Analysis
by VulDB Data Team • 11/14/2022
The vulnerability identified as CVE-2014-8731 represents a critical remote code execution flaw within PHPMemcachedAdmin version 1.2.2 and earlier. This administrative tool for managing memcached servers contains a dangerous input validation weakness that can be exploited by remote attackers to gain unauthorized execution privileges on affected systems. The vulnerability stems from improper handling of user-supplied data during file operations, creating a pathway for malicious actors to inject and execute arbitrary PHP code within the web server environment.
The technical exploitation mechanism involves manipulating serialized data structures combined with filename concatenation operations that occur within the application's file handling routines. When attackers craft specific input parameters that include serialized objects and malicious filename components, the application processes these inputs without adequate sanitization, leading to unintended file creation in the web root directory. This vulnerability operates at the intersection of several security concerns including insecure deserialization, path traversal, and arbitrary code execution, making it particularly dangerous for systems that rely on PHPMemcachedAdmin for memcached server management.
The operational impact of this vulnerability extends beyond simple code execution, as it can enable attackers to establish persistent access, escalate privileges, and potentially compromise entire server infrastructures. Once successfully exploited, attackers can upload malicious files, modify existing application components, and create backdoors for continued access. The vulnerability affects organizations that deploy vulnerable versions of PHPMemcachedAdmin in production environments, particularly those that expose administrative interfaces to untrusted networks or users without proper authentication mechanisms. This creates a significant risk for web applications that depend on memcached for caching operations, as the compromised administrative interface can serve as a gateway to broader system compromise.
Organizations should prioritize immediate patching of affected systems to address this vulnerability, as no reliable workarounds exist for the underlying deserialization flaw. The implementation of proper input validation, secure coding practices, and regular security assessments can help prevent similar issues in future deployments. Security teams should also consider implementing network segmentation and access controls to limit exposure of administrative interfaces to trusted networks only. This vulnerability aligns with CWE-502 which addresses insecure deserialization, and represents a typical attack vector categorized under ATT&CK technique T1059 for execution through PHP scripts, emphasizing the importance of robust application security controls and regular vulnerability assessments to maintain system integrity.