CVE-2015-7611 in James Server
Summary
by MITRE
Apache James Server 2.3.2, when configured with file-based user repositories, allows attackers to execute arbitrary system commands via unspecified vectors.
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Analysis
by VulDB Data Team • 11/27/2024
The Apache James Server represents a widely deployed email server solution that has historically served organizations requiring robust mail handling capabilities. Version 2.3.2, specifically when configured with file-based user repositories, contains a critical vulnerability that exposes systems to remote command execution attacks. This vulnerability stems from insufficient input validation and sanitization within the server's user repository handling mechanisms, creating a pathway for malicious actors to inject and execute arbitrary system commands on the underlying host. The flaw exists in the server's processing of user repository data, where attacker-controlled inputs are not properly validated before being processed within the system's execution context.
The technical implementation of this vulnerability involves the improper handling of user repository data structures that are typically stored in flat file formats. When the server processes user information through file-based repositories, it fails to adequately sanitize input parameters that could contain malicious command sequences. This allows attackers to craft specially formatted user data or repository entries that, when processed by the server, result in unintended system command execution. The vulnerability manifests through unspecified vectors that likely involve manipulation of user account creation, modification, or authentication processes within the file-based repository system. The flaw operates at the intersection of input validation failure and command execution, creating a dangerous privilege escalation scenario.
The operational impact of this vulnerability extends beyond simple remote code execution, encompassing complete system compromise and potential lateral movement within network environments. Successful exploitation enables attackers to execute arbitrary commands with the privileges of the James Server process, which typically runs with elevated system permissions. This creates opportunities for attackers to establish persistent access, exfiltrate sensitive data, or deploy additional malicious payloads. The vulnerability affects organizations using file-based user repositories, which represent a common configuration approach for many deployments, making the attack surface particularly broad. Security teams must consider the potential for this vulnerability to be leveraged as a stepping stone for broader network infiltration and data breaches.
Organizations should prioritize immediate remediation through official patches provided by the Apache Software Foundation, as this vulnerability has been widely documented and exploited in the wild. The recommended mitigation strategy involves upgrading to a patched version of Apache James Server that addresses the input validation deficiencies in user repository handling. Additionally, implementing network segmentation and access controls around James Server installations can limit the potential impact of successful exploitation. Security monitoring should focus on unusual command execution patterns and unexpected file modifications within James Server directories. The vulnerability aligns with CWE-78, which addresses improper neutralization of special elements used in OS commands, and maps to ATT&CK technique T1059 for command and scripting interpreter, highlighting the fundamental nature of this security flaw. Organizations should also consider implementing application whitelisting controls and restricting file system access for the James Server process to minimize potential damage from exploitation attempts.