Summary
Cloud Commander contains a path traversal vulnerability in the /api/v1/pack endpoint that can allow files outside the configured root directory to be read and returned as a downloadable archive.
The issue becomes risky when an attacker can reach the pack API and provide traversal sequences that bypass the intended path validation logic.
Cloud Commander contains a path traversal vulnerability in the /api/v1/pack endpoint that can allow files outside the configured root directory to be read and returned as a downloadable archive.
The issue becomes risky when an attacker can reach the pack API and provide traversal sequences that bypass the intended path validation logic.
Affected context
The vulnerability occurs in Cloud Commander deployments where the /api/v1/pack endpoint processes attacker-controlled path data. The affected handler uses an unguarded root-path operation rather than the validation wrapper applied by other request paths, allowing encoded traversal sequences to escape the configured --root directory. Exploitation may expose operating-system files, application configuration, credentials, or private keys if they are readable by the service account.
The vulnerability occurs in Cloud Commander deployments where the /api/v1/pack endpoint processes attacker-controlled path data. The affected handler uses an unguarded root-path operation rather than the validation wrapper applied by other request paths, allowing encoded traversal sequences to escape the configured --root directory. Exploitation may expose operating-system files, application configuration, credentials, or private keys if they are readable by the service account.
Exploit preconditions
- Attack surface: The HTTP
/api/v1/packendpoint - Required access: Network access to the Cloud Commander service; authentication requirements depend on deployment configuration
- Trigger point: A pack request containing percent-encoded directory traversal sequences
- Why exploitation is possible: The request path reaches an unguarded root operation that does not consistently enforce the configured directory boundary before files are archived and streamed
- Attack surface: The HTTP
/api/v1/packendpoint - Required access: Network access to the Cloud Commander service; authentication requirements depend on deployment configuration
- Trigger point: A pack request containing percent-encoded directory traversal sequences
- Why exploitation is possible: The request path reaches an unguarded root operation that does not consistently enforce the configured directory boundary before files are archived and streamed
Why this happens
The underlying bug is inconsistent path validation between related request handlers. The pack handler invokes a filesystem-root operation directly instead of routing the requested path through a canonicalization and boundary-checking wrapper.
As a result, attacker-controlled path components can be interpreted outside the intended directory. This behavior maps to CWE-23: Relative Path Traversal, where insufficient validation of relative path elements permits access to files beyond the authorized filesystem scope.
The underlying bug is inconsistent path validation between related request handlers. The pack handler invokes a filesystem-root operation directly instead of routing the requested path through a canonicalization and boundary-checking wrapper.
As a result, attacker-controlled path components can be interpreted outside the intended directory. This behavior maps to CWE-23: Relative Path Traversal, where insufficient validation of relative path elements permits access to files beyond the authorized filesystem scope.
Potential impact
- Sensitive operating-system files may be disclosed
- SSH private keys, credentials, or application secrets could be exposed
- Archived responses may enable bulk retrieval of readable files
- Service-account-readable configuration and source files may be collected
- Exposed secrets could support follow-on account or infrastructure compromise
- Sensitive operating-system files may be disclosed
- SSH private keys, credentials, or application secrets could be exposed
- Archived responses may enable bulk retrieval of readable files
- Service-account-readable configuration and source files may be collected
- Exposed secrets could support follow-on account or infrastructure compromise
General mitigation guidance
Mitigation generally focuses on enforcing a single, centralized filesystem boundary for every file-related operation.
Common defensive patterns include:
- Canonicalizing requested paths before access and confirming they remain beneath the configured root
- Reusing the same validated path-resolution wrapper across download, archive, and browse operations
- Rejecting encoded traversal components and ambiguous path representations
- Applying allowlists for files or directories when an archive operation does not require arbitrary paths
- Running the service with a dedicated least-privilege account and limiting readable secrets
- Using filesystem isolation, read-only mounts, and restrictive container or service permissions where practical
- Avoiding the inclusion of sensitive files within directories exposed to file-management features
Mitigation generally focuses on enforcing a single, centralized filesystem boundary for every file-related operation.
Common defensive patterns include:
- Canonicalizing requested paths before access and confirming they remain beneath the configured root
- Reusing the same validated path-resolution wrapper across download, archive, and browse operations
- Rejecting encoded traversal components and ambiguous path representations
- Applying allowlists for files or directories when an archive operation does not require arbitrary paths
- Running the service with a dedicated least-privilege account and limiting readable secrets
- Using filesystem isolation, read-only mounts, and restrictive container or service permissions where practical
- Avoiding the inclusion of sensitive files within directories exposed to file-management features
How teams detect issues like this
Organizations can look for path traversal risks through:
- Static analysis rules identifying filesystem calls that consume request-derived paths without canonicalization and boundary checks
- Code review checks for inconsistent validation between similar endpoints
- Tests using encoded, double-encoded, absolute, and mixed-separator path representations
- Web application monitoring for repeated traversal markers and unusual archive requests
- Policy enforcement requiring centralized path-resolution helpers for file-serving functionality
- Automated security review tools that flag user-controlled paths passed to archive or file-read APIs
Organizations can look for path traversal risks through:
- Static analysis rules identifying filesystem calls that consume request-derived paths without canonicalization and boundary checks
- Code review checks for inconsistent validation between similar endpoints
- Tests using encoded, double-encoded, absolute, and mixed-separator path representations
- Web application monitoring for repeated traversal markers and unusual archive requests
- Policy enforcement requiring centralized path-resolution helpers for file-serving functionality
- Automated security review tools that flag user-controlled paths passed to archive or file-read APIs
