CVE-2025-6209 in llama_index
Summary
by MITRE • 07/07/2025
A path traversal vulnerability exists in run-llama/llama_index versions 0.12.27 through 0.12.40, specifically within the `encode_image` function in `generic_utils.py`. This vulnerability allows an attacker to manipulate the `image_path` input to read arbitrary files on the server, including sensitive system files. The issue arises due to improper validation or sanitization of the file path, enabling path traversal sequences to access files outside the intended directory. The vulnerability is fixed in version 0.12.41.
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Analysis
by VulDB Data Team • 07/31/2025
The path traversal vulnerability identified in run-llama/llama_index versions 0.12.27 through 0.12.40 represents a critical security flaw that directly impacts the integrity and confidentiality of systems utilizing this machine learning framework. This vulnerability specifically resides within the `encode_image` function located in `generic_utils.py`, where the application fails to properly validate or sanitize user-supplied file paths. The flaw enables attackers to manipulate the `image_path` parameter through crafted input sequences that can traverse directory structures and access files outside the intended application scope. This type of vulnerability falls under the common weakness enumeration CWE-22, which specifically addresses path traversal or directory traversal issues in software systems. The attack vector exploits the lack of proper input validation mechanisms that should prevent malicious path manipulation attempts. When an attacker successfully exploits this vulnerability, they can potentially access sensitive system files, configuration data, or other confidential information stored on the server filesystem. The implications extend beyond simple file access as this vulnerability can serve as a foothold for more sophisticated attacks including privilege escalation, data exfiltration, or system compromise. The vulnerability exists due to inadequate sanitization of the `image_path` input parameter, allowing attackers to inject path traversal sequences such as "../" or similar constructs that bypass normal directory access controls. This weakness is particularly dangerous in server environments where the application may have elevated privileges and access to sensitive system resources.
The operational impact of this vulnerability extends significantly beyond the immediate scope of file access, as it represents a fundamental flaw in the application's input handling and validation processes. Attackers can leverage this vulnerability to perform unauthorized file reads across the entire filesystem, potentially accessing critical system files, user data, or application configuration information. The vulnerability affects a specific function within the generic utilities module, suggesting that any application using the `encode_image` functionality could be compromised. The path traversal sequences work by manipulating the file path resolution mechanism, allowing attackers to navigate up directory trees and access files that should normally be restricted. This type of vulnerability is particularly concerning in containerized environments or cloud deployments where the application might have broader filesystem access than intended. The attack surface is expanded when considering that the vulnerability affects multiple versions within the 0.12.x release series, indicating a persistent flaw that required multiple releases to address properly. Security teams must consider this vulnerability as part of their broader threat landscape, as it aligns with techniques described in the attack pattern taxonomy under the MITRE ATT&CK framework for privilege escalation and credential access. The vulnerability's exploitation requires minimal sophistication, making it attractive to attackers across different threat levels and potentially automated attack tools.
Mitigation strategies for this path traversal vulnerability should focus on immediate remediation through version upgrade to 0.12.41 or later, which contains the necessary patches to address the improper input validation. Organizations should implement comprehensive input validation and sanitization measures that prevent path traversal sequences from being processed by the application. The recommended approach includes implementing strict path validation that ensures file paths remain within designated directories and reject any attempts to traverse parent directories. Security controls should enforce the use of absolute paths and normalize all file paths before processing to eliminate potential injection opportunities. Additionally, privilege separation mechanisms should be implemented to ensure that the application runs with minimal required permissions, limiting the damage that can occur even if the vulnerability is exploited. Organizations should conduct thorough security testing including penetration testing and code reviews to identify similar vulnerabilities within their application codebase. The fix for this vulnerability demonstrates the importance of proper input validation and the principle of least privilege in software development. Security teams should also implement monitoring and logging mechanisms to detect potential exploitation attempts, as path traversal attacks often generate unusual access patterns that can be flagged by security information and event management systems. Regular security updates and patch management processes should be enforced to prevent similar vulnerabilities from accumulating in software dependencies. The vulnerability serves as a reminder of the critical importance of validating all user inputs and implementing proper access controls, particularly in applications that handle file operations and system resources.