CVE-2015-2962 in BloBee
Summary
by MITRE
CGI RESCUE BloBee 1.20 and earlier allows remote attackers to write to arbitrary files, and consequently execute arbitrary code, via unspecified vectors.
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Analysis
by VulDB Data Team • 04/06/2019
The vulnerability identified as CVE-2015-2962 affects CGI RESCUE BloBee version 1.20 and earlier, representing a critical security flaw that enables remote attackers to achieve arbitrary file writing and code execution capabilities. This vulnerability stems from insufficient input validation and inadequate file handling mechanisms within the application's core functionality. The unspecified vectors mentioned in the description suggest that attackers can exploit multiple pathways to achieve the unauthorized file manipulation, making the vulnerability particularly concerning due to its potential for diverse exploitation techniques.
The technical flaw manifests through improper validation of user-supplied input that flows into file operations within the BloBee application. When attackers can manipulate input parameters that control file creation or modification processes, they gain the ability to write data to locations outside of intended directories. This weakness aligns with CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal vulnerabilities. The vulnerability essentially allows attackers to bypass normal access controls and write malicious payloads to arbitrary locations on the target system, potentially including system directories or critical application files.
The operational impact of this vulnerability extends beyond simple file manipulation to encompass full system compromise capabilities. Remote attackers can leverage this flaw to upload malicious executables, modify existing binaries, or inject malicious code into the application's execution flow. This creates a persistent threat vector where attackers can establish backdoors, escalate privileges, or maintain long-term access to compromised systems. The vulnerability's potential for code execution places it within the ATT&CK framework's technique T1059, which covers command and scripting interpreter, and T1078, which addresses valid accounts, as attackers can utilize this capability to establish more sophisticated attack chains.
The exploitation of this vulnerability typically involves crafting malicious input that triggers the flawed file handling logic, allowing attackers to specify arbitrary file paths for writing operations. This could involve manipulating URL parameters, form inputs, or API calls that are processed by the BloBee application. The vulnerability's remote nature means that attackers do not require physical access or local system credentials to exploit the flaw, making it particularly dangerous in web-facing environments. Organizations running affected versions should prioritize immediate remediation through patch updates, as the vulnerability represents a high-severity risk that can lead to complete system compromise.
Mitigation strategies should focus on implementing proper input validation and output encoding mechanisms to prevent malicious input from reaching file operations. The application should enforce strict path validation, ensuring that all file operations occur within designated directories and that user input cannot manipulate the target file paths. Additionally, implementing proper access controls and privilege separation can limit the damage that can be caused by successful exploitation attempts. Organizations should also consider network segmentation, intrusion detection systems, and regular security assessments to monitor for potential exploitation attempts. The vulnerability's classification as a remote code execution flaw underscores the importance of maintaining up-to-date security patches and implementing defense-in-depth strategies to protect against similar vulnerabilities in other applications.