Overview
CVE-2025-13875 details a path traversal vulnerability found in Yohann0617’s oci-helper, specifically versions up to 3.2.4. This medium-severity flaw resides within the addCfg function of the OciServiceImpl.java file, which is part of the OCI Configuration Upload component. An attacker can exploit this vulnerability to read arbitrary files on the server by manipulating the File argument. This issue can be exploited remotely.
Technical Details
The vulnerability exists because the addCfg function in src/main/java/com/yohann/ocihelper/service/impl/OciServiceImpl.java doesn’t properly sanitize the input provided through the File argument. An attacker can inject path traversal sequences (e.g., ../) within the filename to navigate outside the intended directory and access sensitive files on the system. The publicly available exploit demonstrates how to craft malicious requests to read arbitrary files.
CVSS Analysis
- Severity: MEDIUM
- CVSS Score: 6.3
A CVSS score of 6.3 indicates a medium severity vulnerability. While not as critical as remote code execution, the ability to read arbitrary files can still lead to significant data breaches and system compromise.
Possible Impact
Successful exploitation of this vulnerability can have severe consequences:
- Configuration File Disclosure: Attackers can read sensitive configuration files containing credentials, API keys, and other sensitive information.
- Data Breach: Access to configuration files or other data can facilitate further attacks and data exfiltration.
- System Compromise: Gained access can be used to compromise the underlying system and potentially gain control.
Mitigation or Patch Steps
Unfortunately, the vendor has not responded to the vulnerability disclosure. Therefore, the following mitigation steps are recommended:
- Isolate oci-helper: If possible, isolate the application to limit the impact of a successful exploit.
- Input Validation: Implement strict input validation on the
Fileargument within theaddCfgfunction. Ensure that path traversal sequences are properly sanitized or rejected. Blacklisting `../` is not sufficient; canonicalization and whitelisting are preferred. - Restrict File System Access: Limit the application’s file system access to only the necessary directories.
- Web Application Firewall (WAF): Deploy a Web Application Firewall (WAF) to detect and block malicious requests containing path traversal attempts. Configure the WAF with rules that specifically target this vulnerability.
- Monitor System Logs: Monitor system logs for suspicious activity, such as attempts to access unusual files.
- Consider Alternative Solutions: If possible, explore alternative solutions that provide similar functionality with improved security.
