Summary
Satel Netco Design contains a relative path traversal vulnerability in its data export functionality. An authenticated Viewer-level user may influence file paths and content, potentially creating or modifying files accessible to the application service and, in certain environments, enabling arbitrary code execution.
Satel Netco Design contains a relative path traversal vulnerability in its data export functionality. An authenticated Viewer-level user may influence file paths and content, potentially creating or modifying files accessible to the application service and, in certain environments, enabling arbitrary code execution.
Affected context
The vulnerability occurs in deployments using the affected data export functionality when user-controlled or insufficiently constrained path information is used for file output. Exploitation generally requires an authenticated account with Viewer privileges and depends on the application service having write access to the targeted filesystem locations.
The vulnerability occurs in deployments using the affected data export functionality when user-controlled or insufficiently constrained path information is used for file output. Exploitation generally requires an authenticated account with Viewer privileges and depends on the application service having write access to the targeted filesystem locations.
Exploit preconditions
- Attack surface: Data export functionality exposed by the Satel Netco Design application
- Required access: An authenticated account with Viewer privileges
- Trigger point: Export processing that resolves a relative, attacker-influenced file path
- Why exploitation is possible: Path handling may allow output to escape the intended export directory and write attacker-influenced content to other application-accessible locations
- Attack surface: Data export functionality exposed by the Satel Netco Design application
- Required access: An authenticated account with Viewer privileges
- Trigger point: Export processing that resolves a relative, attacker-influenced file path
- Why exploitation is possible: Path handling may allow output to escape the intended export directory and write attacker-influenced content to other application-accessible locations
Why this happens
The underlying bug is insufficient canonicalization and validation of user-influenced relative paths before filesystem operations. When traversal sequences are not constrained to an approved destination, the application may interpret a path outside its intended directory and write exported content there. This maps to CWE-23: Relative Path Traversal, which describes improper limitation of a pathname to a restricted directory.
The underlying bug is insufficient canonicalization and validation of user-influenced relative paths before filesystem operations. When traversal sequences are not constrained to an approved destination, the application may interpret a path outside its intended directory and write exported content there. This maps to CWE-23: Relative Path Traversal, which describes improper limitation of a pathname to a restricted directory.
Potential impact
- An attacker may create unauthorized files in locations writable by the application service.
- An attacker may modify existing files, potentially disrupting application behavior or data integrity.
- The application service may be used to overwrite configuration or operational files.
- Arbitrary code execution could occur if a writable target is later interpreted or executed by the host or application.
- Data integrity, availability, and confidentiality could be affected.
- An attacker may create unauthorized files in locations writable by the application service.
- An attacker may modify existing files, potentially disrupting application behavior or data integrity.
- The application service may be used to overwrite configuration or operational files.
- Arbitrary code execution could occur if a writable target is later interpreted or executed by the host or application.
- Data integrity, availability, and confidentiality could be affected.
General mitigation guidance
Mitigation typically focuses on treating export paths as untrusted input and enforcing a confined destination.
Common defensive patterns include:
- Resolve paths canonically and verify that the resulting location remains within an explicitly permitted export directory.
- Prefer server-controlled filenames and storage locations over user-supplied paths.
- Reject traversal markers, absolute paths, symbolic-link escapes, and ambiguous path encodings.
- Use dedicated, minimally privileged service accounts with write access only to required export locations.
- Apply secure-by-default filesystem permissions and separate generated exports from executable or configuration directories.
- Validate export content and destination policy before performing any filesystem write.
Mitigation typically focuses on treating export paths as untrusted input and enforcing a confined destination.
Common defensive patterns include:
- Resolve paths canonically and verify that the resulting location remains within an explicitly permitted export directory.
- Prefer server-controlled filenames and storage locations over user-supplied paths.
- Reject traversal markers, absolute paths, symbolic-link escapes, and ambiguous path encodings.
- Use dedicated, minimally privileged service accounts with write access only to required export locations.
- Apply secure-by-default filesystem permissions and separate generated exports from executable or configuration directories.
- Validate export content and destination policy before performing any filesystem write.
How teams detect issues like this
Organizations can look for this weakness through:
- Static analysis rules identifying filesystem writes that use request-derived or user-controlled path components.
- Code review checks for missing canonicalization, containment validation, or symlink handling.
- Dynamic testing of export endpoints with normalized and encoded traversal variants in controlled environments.
- File integrity monitoring for unexpected changes outside designated export directories.
- Policy enforcement that restricts application write permissions and flags writes to executable, configuration, or system-sensitive paths.
Automated code review and application security testing tools may help identify these patterns when configured for path traversal detection.
Organizations can look for this weakness through:
- Static analysis rules identifying filesystem writes that use request-derived or user-controlled path components.
- Code review checks for missing canonicalization, containment validation, or symlink handling.
- Dynamic testing of export endpoints with normalized and encoded traversal variants in controlled environments.
- File integrity monitoring for unexpected changes outside designated export directories.
- Policy enforcement that restricts application write permissions and flags writes to executable, configuration, or system-sensitive paths.
Automated code review and application security testing tools may help identify these patterns when configured for path traversal detection.
