Full Report
Incorrect Privilege Assignment vulnerability (CVE-2025-2098) has been found in Fast CAD Reader (Beijing Honghu Yuntu Technology) application.
Analysis Summary
# Vulnerability: Incorrect Privilege Assignment in Fast CAD Reader (Dylib Hijacking)
## CVE Details
- CVE ID: CVE-2025-2098
- CVSS Score: Information Unavailable (Severity not explicitly stated, but potential for privilege escalation suggests **High**)
- CWE: CWE-266 (Incorrect Privilege Assignment)
## Affected Systems
- Products: Fast CAD Reader (Beijing Honghu Yuntu Technology)
- Versions: All versions through 4.1.5 (Tested version was 4.1.5)
- Configurations: Application installed on macOS systems.
## Vulnerability Description
The Fast CAD Reader application on macOS is installed with overly permissive file permissions (`rwxrwxrwx`). This configuration violates standard macOS security practices (which typically require `drwxr-xr-x` for directories/applications). This incorrect privilege assignment enables **Dylib Hijacking**, allowing unauthorized users (including Guest accounts and other standard users/applications) to escalate privileges or execute arbitrary code within the context of the application.
## Exploitation
- Status: PoC assumed readily available due to the nature of Dylib Hijacking on improperly permissioned libraries. Vendor non-response noted.
- Complexity: Low (Leveraging known Dylib Hijacking techniques against known permission issues).
- Attack Vector: Local (Requires the attacker to have access to the underlying file system, typically via a low-privileged local account).
## Impact
- Confidentiality: High (If the hijacked library executes with higher privileges, sensitive data accessible to the legitimate application process might be compromised).
- Integrity: High (Unauthorized modification of the application's execution flow or persistent code injection).
- Availability: Medium (Potential for Denial of Service if application binaries are corrupted).
## Remediation
### Patches
- No official patch version was identified as the vendor has not responded to the report.
*Action Required: Monitor vendor communications for updates.*
### Workarounds
- Manually correct the file permissions on the installed Fast CAD Reader application directory/files to adhere to stricter security standards (e.g., `rwxr-xr-x` or stricter ownership/permissions if possible without breaking functionality).
- Restrict user accounts with write access to the directory containing the application installation files.
## Detection
- Indicators of Compromise: Unexpected dynamic library loading errors, process execution tracing showing execution from untrusted library paths, or unauthorized file modifications within the application installation directory.
- Detection methods and tools: File integrity monitoring (FIM) tools configured to monitor the installed path of Fast CAD Reader for unauthorized permission changes or file writes. Static analysis of running processes to check the loaded dynamic libraries against expected paths.
## References
- Vendor advisories: None available due to lack of vendor response.
- Relevant links - defanged:
- hxxps://incydent.cert.pl/#!/lang=en
- hxxps://cert.pl/en/cvd/
- hxxps://www.cve.org/CVERecord?id=CVE-2025-2098